1
|
Nezami R, Otis C, Boyer A, Blanchard J, Moreau M, Pelletier JP, Martel-Pelletier J, Godoy P, Troncy E. Surveillance of Ancylostoma caninum in naturally infected dogs in Quebec, Canada, and assessment of benzimidazole anthelmintics reveal a variable efficacy with the presence of a resistant isolate in imported dogs. Vet Parasitol Reg Stud Reports 2024; 52:101036. [PMID: 38880561 DOI: 10.1016/j.vprsr.2024.101036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 05/09/2024] [Accepted: 05/12/2024] [Indexed: 06/18/2024]
Abstract
Ancylostoma caninum is a widely prevalent parasitic nematode in dogs across the world. There has been a notable increase in reports of anthelmintic resistance in A. caninum within the United States of America in recent years, which has led us to investigate the potential of this scenario in Canada. The study objectives were to assess the prevalence of A. caninum in two different groups, including a colony of rescued dogs in Canada and three imported Greyhound dogs from USA, and to evaluate the efficacy of two benzimidazole (BZ) anthelmintics against A. caninum, complemented with a molecular genetic analysis adapted to low prevalence. Fecal samples were collected at pre- and post-treatment with fenbendazole for the native shelters-origin group, and a combination of anthelmintic formulations, including the pro-BZ febantel for the USA-origin group. The coprology analyses found several genera of internal parasites. Canine ancylostomiasis was the most prevalent parasitosis with 30.77% in the native group and 100% in the USA group, but with overall low average of A. caninum eggs per gram. Through the fecal egg count reduction test (FECRT), applying a cut-off at 90% as baseline of egg reduction for successful efficacy, BZ showed variable efficacy. Furthermore, molecular analysis confirmed the presence of A. caninum in both groups of dogs and found differences in the genetics linked to BZ resistance on the A. caninum β-tubulin isotype 1 gene. In the isolate from the native group, both codons 167 and 200 were homozygous without the presence of single nucleotide polymorphism (SNP). In contrast, the selected isolate from the USA group, showed a homozygous allele at position 200 and a heterozygous SNP at position 167. The latter was congruent with the low efficacy in FECRT and agrees with the recent findings of USA A. caninum isolate resistant phenotype to the BZ anthelmintics. The limitations of the study include an overall low eggs-per-gram in both canine groups, and the shortage of additional fecal samples from the USA group, restraining the molecular analysis only to one out of the three Greyhounds. This study provided some insights on the efficacy of BZs against A. caninum and revealed the presence of BZ resistant isolates in imported dogs in Quebec, Canada. All this information should be considered, for choosing the best strategy in the control of A. caninum using anthelmintic drugs.
Collapse
Affiliation(s)
- Roxana Nezami
- Research Group in Animal Pharmacology of Quebec (GREPAQ) - Université de Montréal, 3200 Sicotte St., Saint-Hyacinthe, QC J2S 2M2, Canada
| | - Colombe Otis
- Research Group in Animal Pharmacology of Quebec (GREPAQ) - Université de Montréal, 3200 Sicotte St., Saint-Hyacinthe, QC J2S 2M2, Canada
| | - Alexandre Boyer
- Research Group in Animal Pharmacology of Quebec (GREPAQ) - Université de Montréal, 3200 Sicotte St., Saint-Hyacinthe, QC J2S 2M2, Canada
| | - Julie Blanchard
- Hôpital vétérinaire de Buckingham, Gatineau, QC, J8L 2H5, Canada
| | - Maxim Moreau
- Université de Montréal Hospital Research Center (CRCHUM), Montréal, QC H2X 0A9, Canada
| | - Jean-Pierre Pelletier
- Université de Montréal Hospital Research Center (CRCHUM), Montréal, QC H2X 0A9, Canada
| | | | - Pablo Godoy
- Research Group in Animal Pharmacology of Quebec (GREPAQ) - Université de Montréal, 3200 Sicotte St., Saint-Hyacinthe, QC J2S 2M2, Canada.
| | - Eric Troncy
- Research Group in Animal Pharmacology of Quebec (GREPAQ) - Université de Montréal, 3200 Sicotte St., Saint-Hyacinthe, QC J2S 2M2, Canada; Université de Montréal Hospital Research Center (CRCHUM), Montréal, QC H2X 0A9, Canada.
| |
Collapse
|
2
|
Kołodziej P, Wujec M, Doligalska M, Makuch-Kocka A, Khylyuk D, Bogucki J, Demkowska-Kutrzepa M, Roczeń-Karczmarz M, Studzińska M, Tomczuk K, Kocki M, Reszka-Kocka P, Granica S, Typek R, Dawidowicz AL, Kocki J, Bogucka-Kocka A. Synthesis and anthelmintic activity of novel thiosemicarbazide and 1,2,4-triazole derivatives: In vitro, in vivo, and in silico study. J Adv Res 2024; 60:57-73. [PMID: 37467960 PMCID: PMC11156610 DOI: 10.1016/j.jare.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 07/06/2023] [Accepted: 07/09/2023] [Indexed: 07/21/2023] Open
Abstract
INTRODUCTION Intestinal parasitic infections are neglected diseases and, due to the increasing resistance of parasites to available drugs, they pose an increasing therapeutic challenge. Therefore, there is a great need for finding new compounds with antiparasitic activity. OBJECTIVES In this work, new thiosemicarbazide and 1,2,4-triazole derivatives were synthesized and tested for their anthelmintic activity. METHODS The synthesis was carried out by classical methods of organic chemistry. Anthelmintic activity tests were carried out in vitro (Rhabditis sp., Haemonchus contortus, Strongylidae sp.) in vivo (Heligmosomoides polygyrus/bakeri), and in silico analysis was performed. RESULTS Quinoline-6-carboxylic acid derivative compounds were designed and synthesized. The highest activity in the screening tests in the Rhabditis model was demonstrated by compound II-1 with a methoxyphenyl substituent LC50 = 0.3 mg/mL. In the next stage of the research, compound II-1 was analyzed in the H. contortus model. The results showed that compound II-1 was active and had ovicidal (percentage of dead eggs > 45 %) and larvicidal (percentage of dead larvae > 75 %) properties. Studies in the Strongylidae sp. model confirmed the ovicidal activity of compound II-1 (percentage of dead eggs ≥ 55 %). In vivo studies conducted in the H. polygyrus/bakeri nematode model showed that the number of nematodes decreased by an average of 30 % under the influence of compound II-1. In silico studies have shown two possible modes of action of compound II-1, i.e. inhibition of tubulin polymerization and SDH. The test compound did not show any systemic toxic effects. Its influence on drug metabolism related to the activity of cytochrome CYP450 enzymes was also investigated. CONCLUSION The results obtained in the in vitro, in vivo, and in silico studies indicate that the test compound can be described as a HIT, which in the future may be used in the treatment of parasitic diseases in humans and animals.
Collapse
Affiliation(s)
- Przemysław Kołodziej
- Laboratory of Diagnostic Parasitology, Chair and Department of Biology and Genetics, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland.
| | - Monika Wujec
- Chair and Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
| | - Maria Doligalska
- Department of Parasitology, Faculty of Biology, University of Warsaw, Miecznikowa 1 Street, 02-096 Warsaw, Poland
| | - Anna Makuch-Kocka
- Department of Pharmacology, Faculty of Health Sciences, Medical University of Lublin, Radziwiłłowska 11 Street, 20-080 Lublin, Poland
| | - Dmytro Khylyuk
- Chair and Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
| | - Jacek Bogucki
- Chair and Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
| | - Marta Demkowska-Kutrzepa
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12 Street, 20-033 Lublin, Poland
| | - Monika Roczeń-Karczmarz
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12 Street, 20-033 Lublin, Poland
| | - Maria Studzińska
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12 Street, 20-033 Lublin, Poland
| | - Krzysztof Tomczuk
- Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12 Street, 20-033 Lublin, Poland
| | - Marcin Kocki
- Chair and Department of Biology and Genetics, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
| | - Patrycja Reszka-Kocka
- Chair and Department of Biology and Genetics, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
| | - Sebastian Granica
- Microbiota Lab, Department of Pharmacognosy and Molecular Basis of Phytotherapy, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1 Street, 02-097 Warsaw, Poland
| | - Rafał Typek
- Department of Chromatography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Marii Curie Sklodowskiej 3 Square, 20-031 Lublin, Poland
| | - Andrzej L Dawidowicz
- Department of Chromatography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Marii Curie Sklodowskiej 3 Square, 20-031 Lublin, Poland
| | - Janusz Kocki
- Department of Clinical Genetics, Faculty of Medicine, Medical University of Lublin, Radziwiłłowska 11 Street, 20-080 Lublin, Poland
| | - Anna Bogucka-Kocka
- Chair and Department of Biology and Genetics, Faculty of Pharmacy, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
| |
Collapse
|
3
|
Zhang Y, Guo W, Wen H, Shi Y, Gao W, Chen X, Wang T, Wang W, Wu W. Analysis of lncRNA-related studies of ivermectin-sensitive and -resistant strains of Haemonchus contortus. Parasitol Res 2024; 123:226. [PMID: 38814484 DOI: 10.1007/s00436-024-08238-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 05/13/2024] [Indexed: 05/31/2024]
Abstract
In this study, 858 novel long non-coding RNAs (lncRNAs) were predicted as sensitive and resistant strains of Haemonchus contortus to ivermectin. These lncRNAs underwent bioinformatic analysis. In total, 205 lncRNAs significantly differed using log2 (difference multiplicity) > 1 or log2 (difference multiplicity) < - 1 and FDR < 0.05 as the threshold for significant difference analysis. We selected five lncRNAs based on significant differences in expression, cis-regulation, and their association with the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathways. These expressions of lncRNAs, namely MSTRG.12610.1, MSTRG.8169.1, MSTRG.6355.1, MSTRG.980.1, and MSTRG.9045.1, were significantly downregulated. These findings were consistent with the results of transcriptomic sequencing. We further investigated the relative expression of target gene mRNAs and the regulation of mRNA and miRNA, starting with lncRNA cis-regulation of mRNA, and constructed a lncRNA-mRNA-miRNA network regulation. After a series of statistical analyses, we finally screened out UGT8, Unc-116, Fer-related kinase-1, GGPP synthase 1, and sart3, which may be involved in developing drug resistance under the regulation of their corresponding lncRNAs. The findings of this study provide a novel direction for future studies on drug resistance targets.
Collapse
Affiliation(s)
- Yanmin Zhang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China
| | - Wenrui Guo
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China
| | - Haifeng Wen
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China
| | - Yaqin Shi
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China
| | - Wa Gao
- Inner Mongolia Key Laboratory of Tick-Borne Infectious Diseases, Inner Mongolia, China
| | - Xindi Chen
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China
| | - Tengyu Wang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China
| | - Wenlong Wang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Inner Mongolia, China.
| | - Weijie Wu
- Hinggan League Agricultural and Animal Husbandry Technology Extension Centre, Ulanhot, China.
| |
Collapse
|
4
|
Rivero J, Cutillas C, Callejón R. New Insights on Tools for Detecting β-Tubulin Polymorphisms in Trichuris trichiura Using rhAmp TM SNP Genotyping. Animals (Basel) 2024; 14:1545. [PMID: 38891592 PMCID: PMC11171370 DOI: 10.3390/ani14111545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/20/2024] [Accepted: 05/20/2024] [Indexed: 06/21/2024] Open
Abstract
Soil-transmitted helminth (STH) infections, commonly treated with benzimidazoles, are linked to resistance through single nucleotide polymorphisms (SNPs) at position 167, 198, or 200 in the β-tubulin isotype 1 gene. The aim of this study was to establish a novel genotyping assay characterized by its rapidity and specificity. This assay was designed to detect the presence of SNPs within the partial β-tubulin gene of Trichuris trichiura. This was achieved through the biallelic discrimination at codons 167, 198, and 200 by employing the competitive binding of two allele-specific forward primers. The specificity and reliability of this assay were subsequently confirmed using Trichuris samples isolated from captive primates. Furthermore, a molecular study was conducted to substantiate the utility of the β-tubulin gene as a molecular marker. The assays showed high sensitivity and specificity when applied to field samples. Nevertheless, none of the SNPs within the β-tubulin gene were detected in any of the adult worms or eggs from the analyzed populations. All specimens consistently displayed an SS genotype. The examination of the β-tubulin gene further validated the established close relationships between the T. trichiura clade and Trichuris suis clade. This reaffirms its utility as a marker for phylogenetic analysis.
Collapse
Affiliation(s)
| | | | - Rocío Callejón
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain; (J.R.); (C.C.)
| |
Collapse
|
5
|
Dolsophon K, Nak-On S, Chontananarth T. Tegumental surface change in Paramphistomum epiclitum caused by Bombax ceiba flowers and black pepper seed extract. Exp Parasitol 2024; 260:108724. [PMID: 38431114 DOI: 10.1016/j.exppara.2024.108724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/12/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
Rumen flukes, parasites of the superfamily Paramphistomoidea, are found in cattle rumen. Heavy infections can cause symptoms such as diarrhea, weight loss, and poor body condition, resulting in a decrease in milk and meat production. This study compares the tegumental surface change of Paramphistomum epiclitum as a response to ethanolic extracts of Bombax ceiba flowers and black pepper seeds. Adult flukes were subjected to various concentrations of crude extracts, including 12.5, 25, 50, 100, and 200 μg/mL for 12, 18, and 24 h incubation. Scanning electron microscopy (SEM) exhibited that the ethanolic extracts of both Bombax ceiba flowers and black pepper seeds caused tegumental surface changes in adult P. epiclitum. Based on the results, Bombax ceiba flower extract has anthelmintic activity, compared with black pepper seed extract, towards adult P. epiclitum due to the deformation of the tegument at lower concentrations than black pepper extract.
Collapse
Affiliation(s)
- Kulvadee Dolsophon
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Sirapat Nak-On
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Thapana Chontananarth
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand; Research and Innovation Unit for Diagnosis of Medical and Veterinary Important Parasites, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand.
| |
Collapse
|
6
|
Assefa A, Damtie D, Abeje G, Almaw A, Berhan A, Debsh H, Getie M. Efficacy of 400 mg albendazole against soil-transmitted helminthes among Salgy Primary School Children, Dembia district, Northwest Ethiopia, 2020. "Uncontrolled experimental study". Health Sci Rep 2024; 7:e2041. [PMID: 38633736 PMCID: PMC11022293 DOI: 10.1002/hsr2.2041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 03/19/2024] [Accepted: 03/26/2024] [Indexed: 04/19/2024] Open
Abstract
Background and Aims Soil-transmitted helminths are one of the most prevalent causes of both intellectual and physical disability in the world. Albendazole (ALB) is a drug recommended for mass treatment of the high burden of soil-transmitted helminths in schoolchildren, particularly in developing countries. However, some researchers have reported that the efficacy of albedazole against soil-transmitted helminths is inconsistent. Monitoring the programs is crucial to evaluating the effectiveness of 400 mg of ALB against soil-transmitted helminths, as well as any changes in its therapeutic efficacy. Thus, the purpose of this study was to evaluate ALB effectiveness in treating soil-transmitted helminthes in Salgy Primary School Children. Methods An uncontrolled experimental study was conducted at Salgy Primary School Children, Northwest Ethiopia, from March to May 2020. A total of 439 schoolchildren were enrolled and screened for soil-transmitted helminths by stratified proportionate systematic random sampling to get 228 positive schoolchildren. Students in grades one through eight were grouped based on their educational attainment. Using the Kato-Katz thick smear technique, the selected stool sample collected from school children was examined using the Kato-Katz thick smear technique to determine the cure and egg reduction rates. The statistical package for social science software, version 20, was used to analyze the data. To determine the relationship between CR (cure rate) and ERR (egg reduction rate) by age, a chi-square test (X 2) was employed and significance was considered at A 95% confidence interval and p Value (p < 0.05). Results A 400 mg single dosage of ALB showed a 99.35% CR and a 97.30% egg reduction rate against Ascaris lumibricoides. Additionally, a 400 mg dose of ALB showed a 95.75% CR and an 82.07% egg reduction rate, suggesting questionable effectiveness against hookworm infections. Trichuris trichiura showed a decreased efficacy, with a 43.53% CR and a 23.12% egg reduction rate. Conclusion A single dose of 400 mg ALB is effective (satisfactory), doubtful, and unsatisfactory against Ascaris lumbricoides, hookworm, and T. trichiura infections, respectively. Further studies using different brands, doses, and routes will be needed to treat hookworm and T. trichiura infections successfully by using a larger sample size.
Collapse
Affiliation(s)
- Adane Assefa
- Department of Medical Parasitology, College of Medical and Health SciencesUniversity of GondarGondarEthiopia
| | - Demekech Damtie
- Department of Medical Parasitology, College of Medical and Health SciencesUniversity of GondarGondarEthiopia
| | - Getu Abeje
- Department of Biomedical sciences, College of Medical and Health SciencesSamara UniversitySamaraEthiopia
| | - Andargachew Almaw
- Department of Medical Laboratory Sciences, College of Medical and Health SciencesDebre Tabor UniversityDebre TaborEthiopia
| | - Ayenew Berhan
- Department of Medical Laboratory Sciences, College of Medical and Health SciencesDebre Tabor UniversityDebre TaborEthiopia
| | - Habtu Debsh
- Department of Medical Laboratory Sciences, College of Medical and Health SciencesWollo UniversityDessieEthiopia
| | - Molla Getie
- Department of Medical Laboratory Sciences, College of Medical and Health SciencesInji‐bara Universityinje‐baraEthiopia
| |
Collapse
|
7
|
McKean EL, Grill E, Choi YJ, Mitreva M, O'Halloran DM, Hawdon JM. Altered larval activation response associated with multidrug resistance in the canine hookworm Ancylostoma caninum. Parasitology 2024; 151:271-281. [PMID: 38163962 PMCID: PMC11007283 DOI: 10.1017/s0031182023001385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 12/15/2023] [Accepted: 12/16/2023] [Indexed: 01/03/2024]
Abstract
Parasitic gastrointestinal nematodes pose significant health risks to humans, livestock, and companion animals, and their control relies heavily on the use of anthelmintic drugs. Overuse of these drugs has led to the emergence of resistant nematode populations. Herein, a naturally occurring isolate (referred to as BCR) of the dog hookworm, Ancylostoma caninum, that is resistant to 3 major classes of anthelmintics is characterized. Various drug assays were used to determine the resistance of BCR to thiabendazole, ivermectin, moxidectin and pyrantel pamoate. When compared to a drug-susceptible isolate of A. caninum, BCR was shown to be significantly resistant to all 4 of the drugs tested. Multiple single nucleotide polymorphisms have been shown to impart benzimidazole resistance, including the F167Y mutation in the β-tubulin isotype 1 gene, which was confirmed to be present in BCR through molecular analysis. The frequency of the resistant allele in BCR was 76.3% following its first passage in the lab, which represented an increase from approximately 50% in the founding hookworm population. A second, recently described mutation in codon 134 (Q134H) was also detected at lower frequency in the BCR population. Additionally, BCR exhibits an altered larval activation phenotype compared to the susceptible isolate, suggesting differences in the signalling pathways involved in the activation process which may be associated with resistance. Further characterization of this isolate will provide insights into the mechanisms of resistance to macrocyclic lactones and tetrahydropyrimidine anthelmintics.
Collapse
Affiliation(s)
- Elise L. McKean
- Department of Microbiology, Immunology, and Tropical Medicine, The George Washington University, Washington, DC, USA
- Department of Biological Sciences, The George Washington University, Washington, DC, USA
| | - Emilia Grill
- Department of Microbiology, Immunology, and Tropical Medicine, The George Washington University, Washington, DC, USA
| | - Young-Jun Choi
- Infectious Diseases Division, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Makedonka Mitreva
- Infectious Diseases Division, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
- McDonnell Genome Institute, Washington University, St. Louis, MO, USA
| | - Damien M. O'Halloran
- Department of Biological Sciences, The George Washington University, Washington, DC, USA
| | - John M. Hawdon
- Department of Microbiology, Immunology, and Tropical Medicine, The George Washington University, Washington, DC, USA
| |
Collapse
|
8
|
Le B, Clarke NE, Legrand N, Nery SV. Effectiveness of ivermectin mass drug administration in the control of soil-transmitted helminth infections in endemic populations: a systematic review and meta-analysis. Infect Dis Poverty 2024; 13:16. [PMID: 38369483 PMCID: PMC10874526 DOI: 10.1186/s40249-024-01185-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 02/01/2024] [Indexed: 02/20/2024] Open
Abstract
BACKGROUND Current soil-transmitted helminth (STH) control guidelines endorse the use of albendazole or mebendazole for school-based targeted preventive chemotherapy (PC), yet their reduced efficacy against Strongyloides stercoralis and Trichuris trichiura presents significant limitations. Emerging evidence indicates that community-wide PC [or mass drug administration (MDA)] using ivermectin, commonly used in other neglected tropical disease (NTD) control programs, may play an important role in controlling these parasites. We conducted a systematic review and meta-analysis to evaluate the effectiveness of ivermectin PC in reducing STH prevalence in endemic populations. METHODS We searched Pubmed, EMBASE, and Web of Science on February 14, 2023, for studies that investigated the effectiveness of ivermectin PC, either alone or in combination with other anthelmintic drugs, on STH infections, and provided a measure of STH prevalence before and after PC. We calculated pooled prevalence reductions for each STH using random-effects meta-analyses. Our protocol is available on PROSPERO (registration number CRD42023401219). RESULTS A total of 21 were eligible for the systematic review, of which 15 were eligible for meta-analysis. All studies delivered ivermectin through MDA. The pooled prevalence reduction of S. stercoralis following MDA with ivermectin alone was 84.49% (95% CI 54.96-94.66) across five studies and 81.37% (95% CI 61.62-90.96) across seven studies with or without albendazole. The prevalence reduction of T. trichiura was 49.93% (95% CI 18.23-69.34) across five studies with ivermectin alone, and 89.40% (95% CI 73.66-95.73) across three studies with the addition of albendazole. There was high heterogeneity for all syntheses (I2 > 65%). CONCLUSIONS This study underscores the key role of ivermectin-based MDA in addressing limitations in current global STH guidelines in terms of limited efficacy against S. stercoralis and T. trichiura. Based on these findings, revising international STH guidelines to include ivermectin is a promising option to progress the control and eventual elimination of STHs and other NTDs.
Collapse
Affiliation(s)
- Brandon Le
- The Kirby Institute, University of New South Wales, Level 6, Wallace Wurth Building, Sydney, NSW, 2052, Australia.
| | - Naomi E Clarke
- The Kirby Institute, University of New South Wales, Level 6, Wallace Wurth Building, Sydney, NSW, 2052, Australia
| | - Nicolas Legrand
- The Kirby Institute, University of New South Wales, Level 6, Wallace Wurth Building, Sydney, NSW, 2052, Australia
| | - Susana Vaz Nery
- The Kirby Institute, University of New South Wales, Level 6, Wallace Wurth Building, Sydney, NSW, 2052, Australia
| |
Collapse
|
9
|
Shaver AO, Miller IR, Schaye ES, Moya ND, Collins J, Wit J, Blanco AH, Shao FM, Andersen EJ, Khan SA, Paredes G, Andersen EC. Quantifying the fitness effects of resistance alleles with and without anthelmintic selection pressure using Caenorhabditis elegans. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.01.578300. [PMID: 38370666 PMCID: PMC10871296 DOI: 10.1101/2024.02.01.578300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Albendazole and ivermectin are the two most commonly co-administered anthelmintic drugs in mass-drug administration programs worldwide. Despite emerging resistance, we do not fully understand the mechanisms of resistance to these drugs nor the consequences of delivering them in combination. Albendazole resistance has primarily been attributed to variation in the drug target, a beta-tubulin gene. Ivermectin targets glutamate-gated chloride channel (GluCl) genes, but it is unknown whether these genes are involved in ivermectin resistance in nature. Using Caenorhabditis elegans, we defined the fitness costs associated with loss of the drug target genes singly or in combinations of the genes that encode GluCl subunits. We quantified the loss-of function effects on three traits: (i) multi-generational competitive fitness, (ii) fecundity, and (iii) development. In competitive fitness and development assays, we found that a deletion of the beta-tubulin gene ben-1 conferred albendazole resistance, but ivermectin resistance required loss of two GluCl genes (avr-14 and avr-15) or loss of three GluCl genes (avr-14, avr-15, and glc-1). The fecundity assays revealed that loss of ben-1 did not provide any fitness benefit in albendazole and that no GluCl deletion mutants were resistant to ivermectin. Next, we searched for evidence of multi-drug resistance across the three traits. Loss of ben-1 did not confer resistance to ivermectin, nor did loss of any single GluCl subunit or combination confer resistance to albendazole. Finally, we assessed the development of 124 C. elegans wild strains across six benzimidazoles and seven macrocyclic lactones to identify evidence of multi-drug resistance between the two drug classes and found a strong phenotypic correlation within a drug class but not across drug classes. Because each gene affects various aspects of nematode physiology, these results suggest that it is necessary to assess multiple fitness traits to evaluate how each gene contributes to anthelmintic resistance.
Collapse
Affiliation(s)
- Amanda O. Shaver
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Isabella R. Miller
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Etta S. Schaye
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Nicolas D. Moya
- Dept. of Biology, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - J.B. Collins
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Janneke Wit
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Alyssa H. Blanco
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Fiona M. Shao
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Elliot J. Andersen
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Sharik A. Khan
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Gracie Paredes
- Molecular Biosciences, Northwestern University, Evanston, Illinois, United States of America
| | - Erik C. Andersen
- Dept. of Biology, Johns Hopkins University, Baltimore, Maryland, United States of America
| |
Collapse
|
10
|
Coffeng LE, Stolk WA, de Vlas SJ. Predicting the risk and speed of drug resistance emerging in soil-transmitted helminths during preventive chemotherapy. Nat Commun 2024; 15:1099. [PMID: 38321011 PMCID: PMC10847116 DOI: 10.1038/s41467-024-45027-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 01/12/2024] [Indexed: 02/08/2024] Open
Abstract
Control of soil-transmitted helminths relies heavily on regular large-scale deworming of high-risk groups (e.g., children) with benzimidazole derivatives. Although drug resistance has not yet been documented in human soil-transmitted helminths, regular deworming of cattle and sheep has led to widespread benzimidazole resistance in veterinary helminths. Here we predict the population dynamics of human soil-transmitted helminth infections and drug resistance during 20 years of regular preventive chemotherapy, using an individual-based model. With the current preventive chemotherapy strategy of mainly targeting children in schools, drug resistance may evolve in soil-transmitted helminths within a decade. More intense preventive chemotherapy strategies increase the prospects of soil-transmitted helminths elimination, but also increase the speed at which drug efficacy declines, especially when implementing community-based preventive chemotherapy (population-wide deworming). If during the last decade, preventive chemotherapy against soil-transmitted helminths has led to resistance, we may not have detected it as drug efficacy has not been structurally monitored, or incorrectly so. These findings highlight the need to develop and implement strategies to monitor and mitigate the evolution of benzimidazole resistance.
Collapse
Affiliation(s)
- Luc E Coffeng
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.
| | - Wilma A Stolk
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Sake J de Vlas
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| |
Collapse
|
11
|
Eteme ON, Zondegoumba EN, Tadayozzi YS, Serafim JA, Leite WQ, de Freitas Genari Severino M, Vicente EF. Methods for extraction, isolation and sequencing of cyclotides and others cyclic peptides with anti-helminthic activities: An overview. Parasitol Int 2024; 98:102808. [PMID: 37717651 DOI: 10.1016/j.parint.2023.102808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 08/21/2023] [Accepted: 09/07/2023] [Indexed: 09/19/2023]
Abstract
The mortality rate caused by parasitic worms on their hosts is of great concern and studies have been carried out to find molecules to reduce the prevalence, host-parasite interaction, and resistance of parasites to treatments. Existing drugs on the market are very often toxic and have many side effects, hence the need to find new, more active molecules. It has been demonstrated in several works that medicinal plants constitute a wide range of new molecules that can solve this problem. Several works have already been able to demonstrate that cyclic peptides of plant origin have shown good activity in the fight against different types of helminths. Therefore, this review aims to provide a general overview of the methods and techniques of extraction, isolation, activities and mechanisms of action of cyclotides and other cyclic peptides for application in the treatment of helminthic infections.
Collapse
Affiliation(s)
- Olivier Ndogo Eteme
- São Paulo State University (UNESP), School of Sciences and Engineering, Tupã, São Paulo 17602-496, Brazil; University of Yaounde I, Faculty of Science, Department of Organic Chemistry, PO. BOX 812, Cameroon.
| | | | - Yasmin Saegusa Tadayozzi
- São Paulo State University (UNESP), School of Sciences and Engineering, Tupã, São Paulo 17602-496, Brazil
| | - Jessica Aparecida Serafim
- São Paulo State University (UNESP), School of Sciences and Engineering, Tupã, São Paulo 17602-496, Brazil
| | - Wendell Queiroz Leite
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal 14884-900, Brazil
| | | | - Eduardo Festozo Vicente
- São Paulo State University (UNESP), School of Sciences and Engineering, Tupã, São Paulo 17602-496, Brazil.
| |
Collapse
|
12
|
Antonopoulos A, Higgins O, Doyle SR, Bartley D, Morrison A, Shalaby MM, Reboud J, Devaney E, Smith TJ, Laing R, Busin V. Real-time single-base specific detection of the Haemonchus contortus S168T variant associated with levamisole resistance using loop-primer endonuclease cleavage loop-mediated isothermal amplification. Mol Cell Probes 2024; 73:101946. [PMID: 38097144 PMCID: PMC10884526 DOI: 10.1016/j.mcp.2023.101946] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/07/2023] [Accepted: 12/07/2023] [Indexed: 12/22/2023]
Abstract
Haemonchus contortus is a parasitic haematophagous nematode that primarily affects small ruminants and causes significant economic loss to the global livestock industry. Treatment of haemonchosis typically relies on broad-spectrum anthelmintics, resistance to which is an important cause of treatment failure. Resistance to levamisole remains less widespread than to other major anthelmintic classes, prompting the need for more effective and accurate surveillance to maintain its efficacy. Loop-primer endonuclease cleavage loop-mediated isothermal amplification (LEC-LAMP) is a recently developed diagnostic method that facilitates multiplex target detection with single nucleotide polymorphism (SNP) specificity and portable onsite testing. In this study, we designed a new LEC-LAMP assay and applied it to detect the levamisole resistance marker S168T in H. contortus. We explored multiplexing probes for both the resistant S168T and the susceptible S168 alleles in a single-tube assay. We then included a generic probe to detect the acr-8 gene in the multiplex assay, which could facilitate the quantification of both resistance markers and overall genetic material from H. contortus in a single step. Our results showed promising application of these technologies, demonstrating a proof-of-concept assay which is amenable to detection of resistance alleles within the parasite population, with the potential for multiplex detection, and point-of-care application enabled by lateral flow end-point detection. However, further optimisation and validation is necessary.
Collapse
Affiliation(s)
- Alistair Antonopoulos
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom; Kreavet, Kruibeke, Belgium.
| | - Owen Higgins
- Molecular Diagnostics Research Group, School of Biological and Chemical Sciences, University of Galway, Galway, Ireland
| | - Stephen R Doyle
- Wellcome Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - David Bartley
- Moredun Research Institute, Penicuik, Scotland, United Kingdom
| | - Alison Morrison
- Moredun Research Institute, Penicuik, Scotland, United Kingdom
| | - Maha Mansour Shalaby
- James Watt School of Engineering, University of Glasgow, Glasgow, Scotland, United Kingdom; Food Control Department, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr-El-Sheikh, Egypt
| | - Julien Reboud
- James Watt School of Engineering, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Eileen Devaney
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Terry J Smith
- Molecular Diagnostics Research Group, School of Biological and Chemical Sciences, University of Galway, Galway, Ireland
| | - Roz Laing
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Valentina Busin
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom.
| |
Collapse
|
13
|
Le B, Clarke NE, Hii SF, Byrne A, Khattak A, Lake S, Lazu E, Wickham S, Wand H, Olsen N, Zendejas-Heredia PA, Sokana O, Romani L, Engelman D, Nasi T, Boara D, Kaldor J, Steer A, Traub R, Nery SV. Effectiveness of one and two doses of ivermectin mass drug administration in reducing the prevalence and intensity of soil-transmitted helminth (STH) infections in Western Province, Solomon Islands: a cluster-randomised, before-after analysis. THE LANCET REGIONAL HEALTH. WESTERN PACIFIC 2024; 42:100942. [PMID: 38357395 PMCID: PMC10865046 DOI: 10.1016/j.lanwpc.2023.100942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/23/2023] [Accepted: 10/09/2023] [Indexed: 02/16/2024]
Abstract
Background Ivermectin mass drug administration (MDA) is effective for controlling onchocerciasis and scabies, with evidence supporting its role in some species of soil-transmitted helminth (STH) infections. In the context of RISE, a cluster-randomised trial for scabies, this study evaluated the effectiveness of ivermectin MDA in reducing STH burden in the Western Province of Solomon Islands. Methods Twenty villages were randomised 1:1 to receive ivermectin MDA as one dose (IVM-1) or two doses (IVM-2) for scabies. The effectiveness of one and two doses in reducing STH prevalence and intensity was evaluated before (May 2019) and 21 months after (February 2021) MDA in May 2019. All residents aged 12 months or older in the study villages were eligible to participate and provide stool specimens. Species-specific STH infection and intensity were assessed using quantitative PCR. We compared prevalence and intensity of infection between baseline and 21 months in each intervention arm individually using cluster-level analysis (adjusted for clustering) and individual-level analysis (adjusted for sex, age, and clustering). The primary outcomes were the prevalence risk difference (RD) from the cluster-level analysis, and the change in adjusted odds of infection from the individual-level analysis. Secondary outcomes included change in incident rates of mean eggs per gram (epg) of stool from baseline to 21 months, relative risk difference in prevalence and relative change in odds of infection between arms at 21 months. Sex data (male/female) were self-reported. Findings Overall, STH infection was assessed in 830 participants from 18 villages at baseline and 1172 from 20 villages at follow-up. Females represented 58% (n = 478) of the sample at baseline and 59% (n = 690) at follow-up. We observed a reduction in Strongyloides spp. prevalence following two doses of ivermectin MDA in the cluster-level analysis from 7.0% (32/458 participants) to 1.2% (8/674 participants), corresponding to a RD of -0.07 (95% CI -0.14 to -0.01, p = 0.036), and in the individual-level analysis (OR 0.11, 95% CI 0.04-0.33, p < 0.001). T. trichiura prevalence decreased following one dose from 19.4% (74/372 participants) to 11.7% (56/505 participants) (OR 0.44, 95% CI 0.26-0.73, p = 0.0040), while egg count reduced in both arms (IVM-1: IRR 0.28, 95% CI 0.11-0.70, p = 0.0070; IVM-2: IRR 0.18, 95% CI 0.08-0.40, p < 0.001), in the individual-level analysis. We did not detect a significant difference in effect measures between the one- and two-dose arms for any species after 21 months. Interpretation Our study highlights the long-term benefits of ivermectin MDA in reducing the burden of Strongyloides spp. and T. trichiura. STH control programs should leverage the geographical overlap of NTDs, existing drug distribution channels, and broad-spectrum agents. Funding The National Health and Medical Research Council of Australia.
Collapse
Affiliation(s)
- Brandon Le
- The Kirby Institute, University of New South Wales, Sydney, Australia
| | - Naomi E. Clarke
- The Kirby Institute, University of New South Wales, Sydney, Australia
| | - Sze Fui Hii
- The University of Melbourne, Melbourne, Australia
| | - Aisling Byrne
- The Kirby Institute, University of New South Wales, Sydney, Australia
| | - Alam Khattak
- The Kirby Institute, University of New South Wales, Sydney, Australia
| | - Susanna Lake
- Murdoch Children's Research Institute, Melbourne, Australia
| | | | | | - Handan Wand
- The Kirby Institute, University of New South Wales, Sydney, Australia
| | - Nick Olsen
- Stats Central, University of New South Wales, Sydney, Australia
| | | | - Oliver Sokana
- Ministry of Health & Medical Services, Honiara, Solomon Islands
| | - Lucia Romani
- The Kirby Institute, University of New South Wales, Sydney, Australia
- Murdoch Children's Research Institute, Melbourne, Australia
| | | | - Titus Nasi
- Ministry of Health & Medical Services, Honiara, Solomon Islands
| | | | - John Kaldor
- The Kirby Institute, University of New South Wales, Sydney, Australia
| | - Andrew Steer
- Murdoch Children's Research Institute, Melbourne, Australia
| | | | - Susana Vaz Nery
- The Kirby Institute, University of New South Wales, Sydney, Australia
| |
Collapse
|
14
|
Salama MA, Alabiad MA, Saleh AA. Impact of resveratrol and zinc on biomarkers of oxidative stress induced by Trichinella spiralis infection. J Helminthol 2023; 97:e100. [PMID: 38099459 DOI: 10.1017/s0022149x23000810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Trichinellosis is a re-emerging worldwide foodborne zoonosis. Oxidative stress is one of the most common detrimental effects caused by trichinellosis. In addition, Trichinella infection poses an infinite and major challenge to the host's immune system. Resistance and side effects limit the efficiency of the existing anti-trichinella medication. Given that concern, this work aimed to investigate the anti-helminthic, antioxidant, anti-inflammatory and immunomodulatory effects of resveratrol and zinc during both phases of Trichinella spiralis infection. Sixty-four Swiss albino mice were divided into four equal groups: non-infected control, infected control, infected and treated with resveratrol, and infected and treated with zinc. Animals were sacrificed on the 7th and 35th days post-infection for intestinal and muscular phase assessments. Drug efficacy was assessed by biochemical, parasitological, histopathological, immunological, and immunohistochemical assays. Resveratrol and zinc can be promising antiparasitic, antioxidant, anti-inflammatory, and immunomodulatory agents, as evidenced by the significant decrease in parasite burden, the significant improvement of liver and kidney function parameters, the increase in total antioxidant capacity (TAC), the reduction of malondialdehyde (MDA) level, the increase in nuclear factor (erythroid-derived 2)-like-2 factor expression, and the improvement in histopathological findings. Moreover, both drugs enhanced the immune system and restored the disturbed immune balance by increasing the interleukin 12 (IL-12) level. In conclusion, resveratrol and zinc provide protection for the host against oxidative harm and the detrimental effects produced by the host's defense response during Trichinella spiralis infection, making them promising natural alternatives for the treatment of trichinellosis.
Collapse
Affiliation(s)
- M A Salama
- Department of Medical Parasitology, Faculty of Medicine, Zagazig University, Egypt
| | - M A Alabiad
- Pathology Department, Faculty of Medicine, Zagazig University, Egypt
| | - A A Saleh
- Department of Medical Parasitology, Faculty of Medicine, Zagazig University, Egypt
| |
Collapse
|
15
|
Höglund J, Daş G, Tarbiat B, Geldhof P, Jansson DS, Gauly M. Ascaridia galli - An old problem that requires new solutions. Int J Parasitol Drugs Drug Resist 2023; 23:1-9. [PMID: 37516026 PMCID: PMC10409999 DOI: 10.1016/j.ijpddr.2023.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/20/2023] [Accepted: 07/22/2023] [Indexed: 07/31/2023]
Abstract
Reports of Ascaridia galli in laying hens in Europe have increased since the ban on conventional battery cages in 2012. As this parasite is transmitted directly via the faecal-oral route by parasite eggs containing a larva, it is reasonable to assume that the escalating problem is related to the increased exposure now occurring in modern welfare-friendly cage-free housing systems. On many farms, A. galli reappears in subsequent flocks, even though the birds have no access to the outdoors, biosecurity is high and empty houses are cleaned and disinfected during downtime. Since the egg production cycle lasts only ≈80 weeks and recombinant antigen production for helminth vaccines has not yet been solved, the development of a vaccine seems to be an unrealistic option. Therefore, disrupting the life cycle of the parasite by other means, including the strategic use of dewormers, appears to be the key to controlling infection. Of concern is that only one class of anthelmintics is licenced for poultry in Europe and that are usually administered indiscriminately through the birds' drinking water and often too late when the parasite is already established. If current calendar-based parasite control strategies are not changed, there is a risk that resistance to anthelmintics may develop, as has already been demonstrated with nematodes in livestock. We insist that treatments can be more effective and the risk of developing drug resistance can be mitigated if we invest in a better understanding of A. galli responses to more prudent and judicious use of anthelmintics. This review identifies knowledge gaps and highlights aspects of sustainable parasite control that require further research to support commercial egg producers.
Collapse
Affiliation(s)
- Johan Höglund
- Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - Gürbüz Daş
- Institute of Nutritional Physiology 'Oskar Kellner', Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany.
| | - Behdad Tarbiat
- Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - Peter Geldhof
- Laboratory for Parasitology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820, Merelbeke, Belgium.
| | - Désirée S Jansson
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - Matthias Gauly
- Free University of Bolzano, Department of Animal Science, Piazza Università 5, 39100, Bolzano, Italy.
| |
Collapse
|
16
|
Mukherjee A, Kar I, Patra AK. Understanding anthelmintic resistance in livestock using "omics" approaches. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:125439-125463. [PMID: 38015400 DOI: 10.1007/s11356-023-31045-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/08/2023] [Indexed: 11/29/2023]
Abstract
Widespread and improper use of various anthelmintics, genetic, and epidemiological factors has resulted in anthelmintic-resistant (AR) helminth populations in livestock. This is currently quite common globally in different livestock animals including sheep, goats, and cattle to gastrointestinal nematode (GIN) infections. Therefore, the mechanisms underlying AR in parasitic worm species have been the subject of ample research to tackle this challenge. Current and emerging technologies in the disciplines of genomics, transcriptomics, metabolomics, and proteomics in livestock species have advanced the understanding of the intricate molecular AR mechanisms in many major parasites. The technologies have improved the identification of possible biomarkers of resistant parasites, the ability to find actual causative genes, regulatory networks, and pathways of parasites governing the AR development including the dynamics of helminth infection and host-parasite infections. In this review, various "omics"-driven technologies including genome scan, candidate gene, quantitative trait loci, transcriptomic, proteomic, and metabolomic approaches have been described to understand AR of parasites of veterinary importance. Also, challenges and future prospects of these "omics" approaches are also discussed.
Collapse
Affiliation(s)
- Ayan Mukherjee
- Department of Animal Biotechnology, West Bengal University of Animal and Fishery Sciences, Nadia, Mohanpur, West Bengal, India
| | - Indrajit Kar
- Department of Avian Sciences, West Bengal University of Animal and Fishery Sciences, Nadia, Mohanpur, West Bengal, India
| | - Amlan Kumar Patra
- American Institute for Goat Research, Langston University, Oklahoma, 73050, USA.
| |
Collapse
|
17
|
Nielsen MK, Kaplan RM, Abbas G, Jabbar A. Biological implications of long-term anthelmintic treatment: what else besides resistance are we selecting for? Trends Parasitol 2023; 39:945-953. [PMID: 37633759 DOI: 10.1016/j.pt.2023.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/28/2023]
Abstract
Long-term intensive use of anthelmintics for parasite control of livestock, companion animals, and humans has resulted in widespread anthelmintic resistance, a problem of great socioeconomic significance. But anthelmintic therapy may also select for other biological traits, which could have implications for anthelmintic performance. Here, we highlight recent examples of changing parasite dynamics following anthelmintic administration, which do not fit the definition of anthelmintic resistance. We also consider other possible examples in which anthelmintic resistance has clearly established, but where coselection for other biological traits may have also occurred. We offer suggestions for collecting more information and gaining a better understanding of these phenomena. Finally, we propose research questions that require further investigation and make suggestions to help address these knowledge gaps.
Collapse
Affiliation(s)
- Martin K Nielsen
- M.H. Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA.
| | - Ray M Kaplan
- School of Veterinary Medicine, St George's University, Grenada, West Indies
| | - Ghazanfar Abbas
- Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, Australia
| | - Abdul Jabbar
- Melbourne Veterinary School, The University of Melbourne, Werribee, Victoria, Australia
| |
Collapse
|
18
|
Alvi MA, Alshammari A, Ali RMA, Ul Haq S, Bashir R, Li L, Saqib M, Sajid MS, Ghafoor M, Imran M, Ijaz MU, Fu BQ, Saeed M, Ahmad I, Liu YY, Yan HB, Jia WZ. Revealing novel cytb and nad5 genes-based population diversity and benzimidazole resistance in Echinococcus granulosus of bovine origin. Front Vet Sci 2023; 10:1191271. [PMID: 37396990 PMCID: PMC10312306 DOI: 10.3389/fvets.2023.1191271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/17/2023] [Indexed: 07/04/2023] Open
Abstract
Cystic echinococcosis (CE) is a neglected zoonotic disease caused by Echinococcus granulosus (sensu stricto). The parasite affects a wide range of livestock and wild animals. In this study, the population diversity of the Echinococcus species was investigated based on mitochondrial cytochrome b (cytb) and NADH dehydrogenase subunit 5 (nad5) genes. In addition to this, β-tubulin gene isoforms of Echinococcus granulosus were amplified to determine the resistance against benzimidazoles. For this purpose, 40 cyst samples from cattle (n = 20) and buffaloes (n = 20) were collected from the main abattoir of Sialkot. DNA extraction was performed using Qiagen Blood and Tissue Kits. Amplification was performed through PCR. Each amplicon was confirmed by GelRed™ stained agarose gel (2%). Samples were sequenced in a DNA analyzer and viewed for any misread nucleotide by using MEGA (v.11). Corrections in nucleotide sequence and multiple sequence alignment were made through the same software. NCBI-BLAST was used for sample specific sequences to identify them as belonging to a particular species. Diversity indices were estimated using DnaSP (v.6) while phylogenetic analysis was inferred using the Bayesian method using MrBayes (v.1.1). β-tubulin gene isoforms sequence analysis was performed to find out the candidate gene causing benzimidazole resistance. All 40 isolates were found positive for E. granulosus. BLAST-based searches of sequences of each isolate for each gene (nad5 and cytb) confirmed their maximum similarity with the G1 genotype. Overall, high haplotype diversity (Hd nad5 = 1.00; Hd cytb = 0.833) and low nucleotide diversity (π nad5 = 0.00560; π = cytb = 0.00763) was identified based on diversity indices. For both the genes, non-significant values of Tajima's D (nad5 = -0.81734; cytb = -0.80861) and Fu's Fs (nad5 = -1.012; cytb = 0.731) indicate recent population expansion. Bayesian phylogeny-based results of nad5 and cytb sequences confirmed their genotypic status as distinct from other Echinococcus species. This study shed light on the status of benzimidazole resistance in Echinococcus granulosus for the very first time from Pakistan. The findings of this study will significantly add in the information available on genetic diversity of Echinoccous granulosus based on cytb and nad5 genes sequences.
Collapse
Affiliation(s)
- Mughees Aizaz Alvi
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, National Para-Reference Laboratory for Animal Echinococcosis, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, Pakistan
| | - Ayed Alshammari
- Department of Biology, College of Science, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
| | - Rana Muhammad Athar Ali
- Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, Pakistan
| | - Shahbaz Ul Haq
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Rizwan Bashir
- Veterinary Disease Diagnostic Laboratory Sialkot, Livestock and Dairy Development Department, Government of Punjab, Lahore, Pakistan
| | - Li Li
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, National Para-Reference Laboratory for Animal Echinococcosis, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Muhammad Saqib
- Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, Pakistan
| | | | - Muzafar Ghafoor
- Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Imran
- Department of Pathology, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Umar Ijaz
- Department of Zoology, Wildlife and Fisheries, University of Agriculture, Faisalabad, Pakistan
| | - Bao-Quan Fu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, National Para-Reference Laboratory for Animal Echinococcosis, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Mohd Saeed
- Department of Biology, College of Science, University of Hail, Hail, Saudi Arabia
| | - Irfan Ahmad
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - You-Yu Liu
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, National Para-Reference Laboratory for Animal Echinococcosis, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Hong-Bin Yan
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, National Para-Reference Laboratory for Animal Echinococcosis, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Wan-Zhong Jia
- State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, National Para-Reference Laboratory for Animal Echinococcosis, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Disease, Yangzhou, China
| |
Collapse
|
19
|
Höglund J, Gustafsson K. Anthelmintic Treatment of Sheep and the Role of Parasites Refugia in a Local Context. Animals (Basel) 2023; 13:1960. [PMID: 37370470 DOI: 10.3390/ani13121960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
Gastrointestinal nematodes in grazing livestock are ubiquitous and can cause severe damage, leading to substantial losses in agricultural yields. It is undeniable that the integrated use of anthelmintics is often an essential component of successful intensive livestock management. However, anthelmintic resistance has been a major challenge for several decades, especially in pasture-based lamb production. Measures are therefore needed to reduce the risk and prevent further spread. In many countries with more extensive lamb production and pronounced resistance problems than in Sweden, the importance of keeping parasites in refugia is emphasised. To ensure that treatment is necessary, the Swedish model is based on deworming certain groups of ewes based on the parasitological results of a faecal examination and then releasing them with their lambs to safe pastures. This is intended to reduce the risk of infection, which ultimately reduces the number of subsequent treatments. Whether this preventive strategy in turn means an increased risk of resistance is debatable. In this review, we explain the importance of parasites in refugia and how they can help delay the development of resistance to anthelmintics. We also discuss how likely it is that our model contributes to an increase in resistance risk and whether there is reason to question whether it is a sustainable strategy in the long term.
Collapse
Affiliation(s)
- Johan Höglund
- Department of Biomedical Sciences and Veterinary Public Health, Section for Parasitology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
| | | |
Collapse
|
20
|
Voigt K, Geiger M, Jäger M. [Five past twelve - the resistance situation in small ruminant gastrointestinal nematodes in Germany]. Tierarztl Prax Ausg G Grosstiere Nutztiere 2023; 51:153-159. [PMID: 37567194 DOI: 10.1055/a-2097-9361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/13/2023]
Abstract
Anthelmintic resistance has reached alarming levels worldwide and already seriously threatens pasture-based small ruminant production in certain geographic regions. The situation in Europe has also dramatically deteriorated in the last decade. This review provides an overview of the occurrence of anthelmintic resistance in small ruminants with a particular focus on Germany and its neighbouring countries. It also covers mechanisms leading to the development and spread of anthelmintic resistance, and recommendations for a responsible use of anthelmintics in veterinary practice.
Collapse
Affiliation(s)
- Katja Voigt
- Klinik für Wiederkäuer mit Ambulanz und Bestandsbetreuung, Ludwig-Maximilians-Universität München
| | - Maximilian Geiger
- Klinik für Wiederkäuer mit Ambulanz und Bestandsbetreuung, Ludwig-Maximilians-Universität München
| | | |
Collapse
|
21
|
Parvin S, Dey AR, Shohana NN, Anisuzzaman M, Rony SA, Akter S, Talukder H, Alam MZ. Ex-vivo efficacy of commercially available anthelmintics against blood feeding stomach worm Haemonchus contortus of ruminants. J Parasit Dis 2023; 47:250-256. [PMID: 37193493 PMCID: PMC10182220 DOI: 10.1007/s12639-023-01565-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 01/05/2023] [Indexed: 01/12/2023] Open
Abstract
Haemonchus contortus is the most prevalent and pathogenic gastrointestinal nematodes (GINs) in ruminants causing extensive economic losses. It is essential to estimate the efficacy of common commercially available anthelmintics against Haemonchus contortus parasite. Here, we standardized an ex-vivo culture platform for H. contortus and evaluated the efficacy of commonly used anthelmintics namely, albendazole (ABZ), levamisole (LVM), ivermectin (IVM), closantel (CLS) and rafoxanide (RFX). Adult worms were collected from abomasa of slaughtered animals, cultured in MEM, DMEM, M199 or RPMI with or without 20% FBS for up to 72 h. Cultured worms were incubated with ABZ, LVM, IVM, RFX or CLS in DMEM supplemented with 20% FBS at different concentrations (0.5-50 µg/ml) in triplicates and examined at 0, 3, 6, 12, 24, 36 and 48 h post treatment. Of the culture conditions, DMEM supplemented with 20% FBS supported the survival of H. contortus for (P < 0.001) longer period of time which was used in the evaluation of anthelmintics. The efficacy of CLS and RFX were significantly (P < 0.001) higher than other drugs and 100% mortality was observed at 2 µg/ml of CLS and RFX within 12 h post treatment. However, ABZ, LVM, and IVM showed significant effect at the concentration of 50 µg/ml with 48, 36, and 24 h, respectively. Morphological changes included severe cuticle disruption around the buccal cavity, posterior region and vulva as well as loss of cuticle structure integrity coupled with expulsion and fragmentation of digestive components of parasites when treated with 50 µg/ml of ABZ, LVM, and IVM and 2 µg/ml of RFX and CLS. Collectively, DMEM supplemented with 20% FBS can be used as ex-vivo culture platform for maintenance of H. contortus, and RFX and CLS can be used as the promising drugs for the prevention, control and treatment of H. contortus infections.
Collapse
Affiliation(s)
- Shanaz Parvin
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Anita Rani Dey
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Nusrat Nowrin Shohana
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Md. Anisuzzaman
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Sharmin Aqter Rony
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Shirin Akter
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Hasanuzzaman Talukder
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| | - Mohammad Zahangir Alam
- Department of Parasitology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202 Bangladesh
| |
Collapse
|
22
|
Mrimi EC, Welsche S, Ali SM, Hattendorf J, Keiser J. Emodepside for Trichuris trichiura and Hookworm Infection. N Engl J Med 2023; 388:1863-1875. [PMID: 37195942 DOI: 10.1056/nejmoa2212825] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
BACKGROUND Current treatments for soil-transmitted helminth infections in humans have low efficacy against Trichuris trichiura. Emodepside - a drug in veterinary use and under development for the treatment of onchocerciasis in humans - is a leading therapeutic candidate for soil-transmitted helminth infection. METHODS We conducted two phase 2a, dose-ranging, randomized, controlled trials to evaluate the efficacy and safety of emodepside against T. trichiura and hookworm infections. We randomly assigned, in equal numbers, adults 18 to 45 years of age in whom T. trichiura or hookworm eggs had been detected in stool samples to receive emodepside, at a single oral dose of 5, 10, 15, 20, 25, or 30 mg; albendazole, at a single oral dose of 400 mg; or placebo. The primary outcome was the percentage of participants who were cured of T. trichiura or hookworm infection (the cure rate) with emodepside 14 to 21 days after treatment, determined with the use of the Kato-Katz thick-smear technique. Safety was assessed 3, 24, and 48 hours after the receipt of treatment or placebo. RESULTS A total of 266 persons were enrolled in the T. trichiura trial and 176 in the hookworm trial. The predicted cure rate against T. trichiura in the 5-mg emodepside group (85% [95% confidence interval {CI}, 69 to 93]; 25 of 30 participants) was higher than the predicted cure rate in the placebo group (10% [95% CI, 3 to 26]; 3 of 31 participants) and the observed cure rate in the albendazole group (17% [95% CI, 6 to 35]; 5 of 30 participants). A dose-dependent relationship was shown in participants with hookworm: the observed cure rate was 32% (95% CI, 13 to 57; 6 of 19 participants) in the 5-mg emodepside group and 95% (95% CI, 74 to 99.9; 18 of 19 participants) in the 30-mg emodepside group; the observed cure rates were 14% (95% CI, 3 to 36; 3 of 21 participants) in the placebo group and 70% (95% CI, 46 to 88; 14 of 20 participants) in the albendazole group. In the emodepside groups, headache, blurred vision, and dizziness were the most commonly reported adverse events 3 and 24 hours after treatment; the incidence of events generally increased in a dose-dependent fashion. Most adverse events were mild in severity and were self-limited; there were few moderate and no serious adverse events. CONCLUSIONS Emodepside showed activity against T. trichiura and hookworm infections. (Funded by the European Research Council; ClinicalTrials.gov number, NCT05017194.).
Collapse
Affiliation(s)
- Emmanuel C Mrimi
- From the Swiss Tropical and Public Health Institute, Allschwil, and the University of Basel, Basel - both in Switzerland (E.C.M., S.W., J.H., J.K.); and Ifakara Health Institute, Ifakara (E.C.M.), and Public Health Laboratory Ivo de Carneri, Chake Chake, Pemba (S.M.A.) - both in Tanzania
| | - Sophie Welsche
- From the Swiss Tropical and Public Health Institute, Allschwil, and the University of Basel, Basel - both in Switzerland (E.C.M., S.W., J.H., J.K.); and Ifakara Health Institute, Ifakara (E.C.M.), and Public Health Laboratory Ivo de Carneri, Chake Chake, Pemba (S.M.A.) - both in Tanzania
| | - Said M Ali
- From the Swiss Tropical and Public Health Institute, Allschwil, and the University of Basel, Basel - both in Switzerland (E.C.M., S.W., J.H., J.K.); and Ifakara Health Institute, Ifakara (E.C.M.), and Public Health Laboratory Ivo de Carneri, Chake Chake, Pemba (S.M.A.) - both in Tanzania
| | - Jan Hattendorf
- From the Swiss Tropical and Public Health Institute, Allschwil, and the University of Basel, Basel - both in Switzerland (E.C.M., S.W., J.H., J.K.); and Ifakara Health Institute, Ifakara (E.C.M.), and Public Health Laboratory Ivo de Carneri, Chake Chake, Pemba (S.M.A.) - both in Tanzania
| | - Jennifer Keiser
- From the Swiss Tropical and Public Health Institute, Allschwil, and the University of Basel, Basel - both in Switzerland (E.C.M., S.W., J.H., J.K.); and Ifakara Health Institute, Ifakara (E.C.M.), and Public Health Laboratory Ivo de Carneri, Chake Chake, Pemba (S.M.A.) - both in Tanzania
| |
Collapse
|
23
|
Elghandour MMMY, Maggiolino A, Vázquez-Mendoza P, Alvarado-Ramírez ER, Cedillo-Monroy J, De Palo P, Salem AZM. Moringa oleifera as a Natural Alternative for the Control of Gastrointestinal Parasites in Equines: A Review. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091921. [PMID: 37176979 PMCID: PMC10181162 DOI: 10.3390/plants12091921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/25/2023] [Accepted: 05/07/2023] [Indexed: 05/15/2023]
Abstract
Studies have shown a wide variety of parasites that infect horses, causing major gastrointestinal damage that can lead to death, and although the main method of control has been synthetic anthelmintics, there are parasites that have developed resistance to these drugs. For generations, plants have been used throughout the world as a cure or treatment for countless diseases and their symptoms, as is the case of Moringa oleifera, a plant native to the western region. In all its organs, mainly in leaves, M. oleifera presents a diversity of bioactive compounds, including flavonoids, tannins, phenolic acids, saponins, and vitamins, which provide antioxidant power to the plant. The compounds with the greatest antiparasitic activity are tannins and saponins, and they affect both the larvae and the oocytes of various equine gastrointestinal parasites. Therefore, M. oleifera is a promising source for the natural control of gastrointestinal parasites in horses.
Collapse
Affiliation(s)
| | - Aristide Maggiolino
- Department of Veterinary Medicine, University of Bari A. Moro, Valenzano, 70010 Bari, Italy
| | - Paulina Vázquez-Mendoza
- Facultad Maya de Estudios Agropecuarios, Universidad Autónoma de Chiapas, Catazajá 29980, Chiapas, Mexico
| | | | - José Cedillo-Monroy
- Temascaltepec University Center, Autonomous University of the State of Mexico, Temascaltepec 51300, Estado de México, Mexico
| | - Pasquale De Palo
- Department of Veterinary Medicine, University of Bari A. Moro, Valenzano, 70010 Bari, Italy
| | - Abdelfattah Zeidan Mohamed Salem
- Faculty of Veterinary Medicine and Zootechnics, Autonomous University of the State of Mexico, Toluca 50295, Estado de México, Mexico
| |
Collapse
|
24
|
Kaplan RM, Denwood MJ, Nielsen MK, Thamsborg SM, Torgerson PR, Gilleard JS, Dobson RJ, Vercruysse J, Levecke B. World Association for the Advancement of Veterinary Parasitology (W.A.A.V.P.) guideline for diagnosing anthelmintic resistance using the faecal egg count reduction test in ruminants, horses and swine. Vet Parasitol 2023; 318:109936. [PMID: 37121092 DOI: 10.1016/j.vetpar.2023.109936] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 04/18/2023] [Indexed: 05/02/2023]
Abstract
The faecal egg count reduction test (FECRT) remains the method of choice for establishing the efficacy of anthelmintic compounds in the field, including the diagnosis of anthelmintic resistance. We present a guideline for improving the standardization and performance of the FECRT that has four sections. In the first section, we address the major issues relevant to experimental design, choice of faecal egg count (FEC) method, statistical analysis, and interpretation of the FECRT results. In the second section, we make a series of general recommendations that are applicable across all animals addressed in this guideline. In the third section, we provide separate guidance details for cattle, small ruminants (sheep and goats), horses and pigs to address the issues that are specific to the different animal types. Finally, we provide overviews of the specific details required to conduct an FECRT for each of the different host species. To address the issues of statistical power vs. practicality, we also provide two separate options for each animal species; (i) a version designed to detect small changes in efficacy that is intended for use in scientific studies, and (ii) a less resource-intensive version intended for routine use by veterinarians and livestock owners to detect larger changes in efficacy. Compared to the previous FECRT recommendations, four important differences are noted. First, it is now generally recommended to perform the FECRT based on pre- and post-treatment FEC of the same animals (paired study design), rather than on post-treatment FEC of both treated and untreated (control) animals (unpaired study design). Second, instead of requiring a minimum mean FEC (expressed in eggs per gram (EPG)) of the group to be tested, the new requirement is for a minimum total number of eggs to be counted under the microscope (cumulative number of eggs counted before the application of a conversion factor). Third, we provide flexibility in the required size of the treatment group by presenting three separate options that depend on the (expected) number of eggs counted. Finally, these guidelines address all major livestock species, and the thresholds for defining reduced efficacy are adapted and aligned to host species, anthelmintic drug and parasite species. In conclusion, these new guidelines provide improved methodology and standardization of the FECRT for all major livestock species.
Collapse
Affiliation(s)
- Ray M Kaplan
- Pathobiology Department, School of Veterinary Medicine, St. George's University, W.I., Grenada.
| | - Matthew J Denwood
- Department of Veterinary and Animal Sciences, University of Copenhagen, Denmark
| | - Martin K Nielsen
- Maxwell H. Gluck Equine Research Center, University of Kentucky, KY, USA
| | - Stig M Thamsborg
- Department of Veterinary and Animal Sciences, University of Copenhagen, Denmark
| | - Paul R Torgerson
- Section of Epidemiology, Vetsuisse Faculty, University of Zürich, Switzerland
| | - John S Gilleard
- Department of Comparative Biology and Experimental Medicine, Host-Parasite Interactions Program, Faculty of Veterinary Medicine, University of Calgary, Alberta, Canada
| | - Robert J Dobson
- School of Veterinary and Life Sciences, Murdoch University, Australia
| | - Jozef Vercruysse
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Merelbeke, Belgium
| | - Bruno Levecke
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Merelbeke, Belgium
| |
Collapse
|
25
|
Molina JM, Hernández YI, Ferrer O, Conde-Felipe MM, Rodríguez F, Ruiz A. Immunization with thiol-binding proteins from Haemonchus contortus adult worms partially protects goats against infection during prepatency. Exp Parasitol 2023; 248:108512. [PMID: 36965594 DOI: 10.1016/j.exppara.2023.108512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/25/2022] [Accepted: 03/16/2023] [Indexed: 03/27/2023]
Abstract
To contribute of the knowledge of the immune mechanisms underlying the response to the immunization of goats with thiol-binding proteins fractions (PBS-TSBP) from Haemonchus contortus (H. contortus) adult worms, this study analyzed the degree of protection and the immune responses developed against the parasite after vaccination with this antigenic complex during the time-elapsing between challenge with L3 of the parasite and the development of adult worms, evidenced by the appearance of first faecal eggs (prepatent period or prepatency). Goat kids immunized with PBS-TBSP generated an immune response during the prepatency which translates into a reduction in the number of worms, as well as a lower reduction on packed cell volume and plasma protein levels in relation to the non-vaccinated animals. As previously described in other studies carried out after the prepatent period, this protection was associated with a systemic humoral response. At the local level, a specific humoral response was also observed, together with an immune-inflammatory infiltrate in the gastric mucosa of MCH-II + cells and CD4+ lymphocytes, whose number was associated with a reduction in the number of worms and an increase in plasma proteins. A high peripheral eosinophilia was detected, but no corresponding increased infiltration of the gastric mucosa by eosinophils or globular leukocytes was observed. In agreement with previous data on the immunolocalization of the antigens used here, the results obtained contribute to the idea that these may be excretion/secretion (E/S) products necessary for parasite survival, whose inactivation during the larval and/or pre-adult stages may have contributed to immunoprotection.
Collapse
Affiliation(s)
- J M Molina
- Department of Animal Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, Gran Canaria, Spain.
| | - Y I Hernández
- Department of Animal Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, Gran Canaria, Spain.
| | - O Ferrer
- Department of Animal Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, Gran Canaria, Spain.
| | - M M Conde-Felipe
- Department of Animal Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, Gran Canaria, Spain.
| | - F Rodríguez
- Department of Anatomy and Compared Anatomy Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, Spain.
| | - A Ruiz
- Department of Animal Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, Gran Canaria, Spain.
| |
Collapse
|
26
|
Synergism of macrocyclic lactones against Haemonchus contortus. Parasitol Res 2023; 122:867-876. [PMID: 36764962 DOI: 10.1007/s00436-023-07790-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/02/2023] [Indexed: 02/12/2023]
Abstract
A possible synergistic effect of macrocyclic lactones' (MLs) combination has been previously described against resistant gastrointestinal nematodes of cattle. In addition to synergism, drug-drug interactions between MLs can also result in additive or antagonistic effect, considering the different MLs pharmacokinetics, pharmacodynamics, and interactions with molecular mechanisms of resistance. Therefore, the aim of the current work was evaluated the effect of different MLs combinations against Haemonchus contortus. Infecting larvae of two isolates (one susceptible and one resistant to ivermectin) were used in the larval migration inhibition test. After estimating the half maximal effective concentration of abamectin (ABA), eprinomectin, (EPR), ivermectin (IVM), and moxidectin (MOX) for both isolates, combinations were delineated by a simplex-centroid mixture experiment, and the mixture regression analysis was applied to the special cubic model. A synergistic effect was found for the EPR + MOX against the susceptible isolate as well as the EPR + MOX, IVM + MOX, and ABA + EPR + IVM against the resistant isolate. An antagonistic effect of ABA + IVM + MOX was found against the susceptible isolate. For the susceptible isolate, a higher inhibition was found with greater proportions of EPR and lower proportions of the other drugs compared to the reference mixture. For the resistant isolate, inhibition greater than that of the reference mixture was found with higher proportions of IVM as well as lower proportions of the other drugs. The synergistic and antagonistic effects were dependent on the following: (a) parasite drug resistance profile, (b) the composition of the combination, and (c) the proportions used, with EPR and IVM exerting a greater impact on these effects.
Collapse
|
27
|
Tribiños F, Cuevas P, Cornejo I, Sepúlveda FV, Cid LP. A new family of glutamate-gated chloride channels in parasitic sea louse Caligus rogercresseyi: A subunit refractory to activation by ivermectin is dominant in heteromeric assemblies. PLoS Pathog 2023; 19:e1011188. [PMID: 36917600 PMCID: PMC10038264 DOI: 10.1371/journal.ppat.1011188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 03/24/2023] [Accepted: 02/07/2023] [Indexed: 03/16/2023] Open
Abstract
Sea louse ectoparasitosis is a major threat to fish aquaculture. Avermectins such as ivermectin and emamectin have been effectively used against sea louse infestation, but the emergence of resistance has limited their use. A better understanding of the molecular targets of avermectins is essential to the development of novel treatment strategies or new, more effective drugs. Avermectins are known to act by inhibiting neurotransmission through allosteric activation of glutamate-gated chloride channels (GluCls). We have investigated the GluCl subunit present in Caligus rogercresseyi, a sea louse affecting aquaculture in the Southern hemisphere. We identify four new subunits, CrGluCl-B to CrGluCl-E, and characterise them functionally. CrGluCl-A (previously reported as CrGluClα), CrGluCl-B and CrGluCl-C all function as glutamate channel receptors with different sensitivities to the agonist, but in contrast to subunit -A and -C, CrGluCl-B is not activated by ivermectin but is rather antagonised by the drug. CrGluCl-D channel appears active in the absence of any stimulation by glutamate or ivermectin and CrGluCl-E does not exhibit any activity. Notably, the expression of CrGluCl-B with either -A or -C subunits gives rise to receptors unresponsive to ivermectin and showing altered response to glutamate, suggesting that coexpression has led to the preferential formation of heteromers to which the presence of CrGluCl-B confers the property of ivermectin-activation refractoriness. Furthermore, there was evidence for heteromer formation with novel properties only when coexpressing pairs E/C and D/B CrGluCl subtypes. Site-directed mutagenesis shows that three transmembrane domain residues contribute to the lack of activation by ivermectin, most crucially Gln 15' in M2, with mutation Q15'T (the residue present in ivermectin-activated subunits A and C) conferring ivermectin activation to CrGluCl-B. The differential response to avermectin of these Caligus rogercresseyi GluClsubunits, which are highly conserved in the Northern hemisphere sea louse Lepeophtheirus salmonis, could have an influence on the response of these parasites to treatment with macrocyclic lactones. They could serve as molecular markers to assess susceptibility to existing treatments and might be useful molecular targets in the search for novel antiparasitic drugs.
Collapse
Affiliation(s)
| | | | - Isabel Cornejo
- Centro de Estudios Científicos (CECs), Valdivia, Chile
- Facultad de Ciencias para el Cuidado de la Salud, Universidad San Sebastián, Valdivia, Chile
| | - Francisco V Sepúlveda
- Centro de Estudios Científicos (CECs), Valdivia, Chile
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Valdivia, Chile
| | - L Pablo Cid
- Centro de Estudios Científicos (CECs), Valdivia, Chile
- Facultad de Medicina y Ciencia, Universidad San Sebastián, Valdivia, Chile
| |
Collapse
|
28
|
Chrestia JF, Turani O, Araujo NR, Hernando G, Esandi MDC, Bouzat C. Regulation of nicotinic acetylcholine receptors by post-translational modifications. Pharmacol Res 2023; 190:106712. [PMID: 36863428 DOI: 10.1016/j.phrs.2023.106712] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/21/2023] [Accepted: 02/24/2023] [Indexed: 03/04/2023]
Abstract
Nicotinic acetylcholine receptors (nAChRs) comprise a family of pentameric ligand-gated ion channels widely distributed in the central and peripheric nervous system and in non-neuronal cells. nAChRs are involved in chemical synapses and are key actors in vital physiological processes throughout the animal kingdom. They mediate skeletal muscle contraction, autonomic responses, contribute to cognitive processes, and regulate behaviors. Dysregulation of nAChRs is associated with neurological, neurodegenerative, inflammatory and motor disorders. In spite of the great advances in the elucidation of nAChR structure and function, our knowledge about the impact of post-translational modifications (PTMs) on nAChR functional activity and cholinergic signaling has lagged behind. PTMs occur at different steps of protein life cycle, modulating in time and space protein folding, localization, function, and protein-protein interactions, and allow fine-tuned responses to changes in the environment. A large body of evidence demonstrates that PTMs regulate all levels of nAChR life cycle, with key roles in receptor expression, membrane stability and function. However, our knowledge is still limited, restricted to a few PTMs, and many important aspects remain largely unknown. There is thus a long way to go to decipher the association of aberrant PTMs with disorders of cholinergic signaling and to target PTM regulation for novel therapeutic interventions. In this review we provide a comprehensive overview of what is known about how different PTMs regulate nAChR.
Collapse
Affiliation(s)
- Juan Facundo Chrestia
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Argentina
| | - Ornella Turani
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Argentina
| | - Noelia Rodriguez Araujo
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Argentina
| | - Guillermina Hernando
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Argentina
| | - María Del Carmen Esandi
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Argentina
| | - Cecilia Bouzat
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Argentina.
| |
Collapse
|
29
|
Goel V, Sharma S, Chakroborty NK, Singla LD, Choudhury D. Targeting the nervous system of the parasitic worm, Haemonchus contortus with quercetin. Heliyon 2023; 9:e13699. [PMID: 36852031 PMCID: PMC9957779 DOI: 10.1016/j.heliyon.2023.e13699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 01/20/2023] [Accepted: 02/07/2023] [Indexed: 02/14/2023] Open
Abstract
Prevalence of infection, limited choice of drugs, and emerging resistance against contemporary medications lead to a pressing need to develop new anthelmintic drugs and drug targets. However, little understanding of worms' physiology has substantially delayed the process. Here, we are reporting the tissue morphology of Haemonchus contortus, intestinal parasitic helminths found in small ruminants, and targeting its nervous system with quercetin, a naturally occurring flavonoid. Quercetin showed anthelmintic activity against all of the developmental stages of H. contortus. Further, histological analysis demonstrated damage to various body parts, including isthmus, brut, pseudocoele, and other organs. Mechanistic studies revealed the generation of oxidative stress and alterations in the activities of the stress response enzymes, such as catalase, superoxide dismutase, and glutathione peroxidase. Moreover, the time-dependent imaging of reactive oxygen species (ROS) generated due to quercetin treatment disclosed neuropils as the primary targets of quercetin in adult worms, which eventually lead to the paralysis and death of the worms. Thus, this work demonstrates that the nervous system of the parasitic helminth, H. contortus, is a novel target of the drug quercetin.
Collapse
Affiliation(s)
- Vanshita Goel
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, Punjab, India
| | - Sunidhi Sharma
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, Punjab, India
| | - Neloy Kumar Chakroborty
- Thapar School of Liberal Arts & Sciences, Thapar Institute of Engineering & Technology, Patiala, 147004, Punjab, India
| | - Lachhman Das Singla
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab 141001, India
| | - Diptiman Choudhury
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, Punjab, India.,Thapar Institute of Engineering & Technology-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering & Technology, Patiala, 147004, Punjab, India
| |
Collapse
|
30
|
Jouffroy S, Bordes L, Grisez C, Sutra JF, Cazajous T, Lafon J, Dumont N, Chastel M, Vial-Novella C, Achard D, Karembe H, Devaux M, Abbadie M, Delmas C, Lespine A, Jacquiet P. First report of eprinomectin-resistant isolates of Haemonchus contortus in 5 dairy sheep farms from the Pyrénées Atlantiques département in France. Parasitology 2023; 150:1-9. [PMID: 36661208 PMCID: PMC10090475 DOI: 10.1017/s0031182023000069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 01/21/2023]
Abstract
Infection of sheep by gastrointestinal nematodes (GIN) in pastoral systems such as those found in the South Western area of France, the Pyrénées Atlantiques, is one of the main reasons for economic loss and degradation of their welfare. In the present study, the efficacy of eprinomectin (EPN) was monitored on farms from this area following suspicion of lack of anthelmintic efficacy. Suspicions were raised by veterinarians, based on clinical signs ranging from milk and body condition loss, to anaemia, and mortality. Resistance was evaluated according to the World Association for the Advancement for Veterinary Parasitology (WAAVP) guidelines using fecal egg count reduction tests reinforced by individual analysis of drug concentration in the serum of all treated ewes by high-performance liquid chromatography (HPLC). EPN was administered by subcutaneous (SC) and topical (T) route according to manufacturer's requirements, as well as by the oral route (O) with the topical solution according to off-labelled practices in the field. For the first time in France, the presence of resistant isolates of Haemonchus contortus to EPN was observed in 5 dairy sheep farms. The HPLC dosages showed exposure of worms to concentrations compatible with anthelmintic activity for animals treated by the SC and O routes. By contrast, they showed under exposure to the drug of most individuals treated by the T route. EPN is the only null milk withdrawal anthelmintic molecule currently available. The presence of resistant isolates of the pathogenic H. contortus to EPN in this important dairy region requires an urgent change in grazing, and sometimes production, systems.
Collapse
Affiliation(s)
- S. Jouffroy
- INTHERES, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
- CEVA Santé Animale, 33500 Libourne, France
| | - L. Bordes
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - C. Grisez
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - J. F. Sutra
- INTHERES, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - T. Cazajous
- Selarl Vétérinaire du Piémont, 64800 Mirepeix, France
| | - J. Lafon
- Clinique Vétérinaire du Haut Béarn, 64400 Oloron Ste Marie, France
| | - N. Dumont
- Vétérinaires Garazi, 64220 St Jean le Vieux, France
| | - M. Chastel
- Clinique du Saison, 64470 Tardets-Sorholus, France
| | | | - D. Achard
- CEVA Santé Animale, 33500 Libourne, France
| | - H. Karembe
- CEVA Santé Animale, 33500 Libourne, France
| | - M. Devaux
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - M. Abbadie
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - C. Delmas
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - A. Lespine
- INTHERES, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| | - P. Jacquiet
- IHAP, Université de Toulouse, INRAE, ENVT, 31027 Toulouse Cedex 3, France
| |
Collapse
|
31
|
Batista LF, Oliveira LLDS, Silva FVE, Lima WDS, Pereira CADJ, Rocha RHF, Santos IS, Dias Júnior JA, Alves CA. Anthelmintic resistance in sheep in the semiarid region of Minas Gerais, Brazil. Vet Parasitol Reg Stud Reports 2023; 37:100821. [PMID: 36623902 DOI: 10.1016/j.vprsr.2022.100821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Anthelmintic efficacy was evaluated among sheep that had become naturally infected with gastrointestinal nematodes in 17 flocks located in the semiarid region of Minas Gerais, Brazil. Feces were collected individually from 1021 hairy sheep to determine the number of eggs per gram of feces (EPG) and for coprocultures to identify nematode genera the nematodes. Only the animals that presented EPG counts greater than or equal to 200 were included in the study (totaling 381 sheep). The animals were divided into three treatment groups: albendazole, ivermectin and levamisole. Fourteen days after the administration of anthelmintics, fecal samples were taken from all animals. In each flock, the pre-treatment and post-treatment arithmetic mean EPG were used to calculate the efficacy (FECR) for each of the treatment groups and the lower 95% confidence limit. Data were analyzed with the "eggCounts 2.3" package in RStudio, using a Bayesian model for paired design. The anthelmintics were classified as being efficacious (when the FECR was both equal to or above 95% and the lower 95% confidence limit was equal to or above 90%) or as encountering anthelmintic resistance (when the FECR was below 95% and the lower 95% confidence limit was below 90%) or inconclusive (when none of the other criteria were fulfilled). Albendazole and ivermectin were not effective in any of the flocks. Levamisole was effective against gastrointestinal nematodes in 25% of the flocks studied. Haemonchus, Trichostrongylus and Oesophagostomum genera were identified in this study in a semiarid region of Minas Gerais, Brazil. The genus Haemonchus was the most prevalent, followed by Trichostrongylus and Oesophagostomum. After anthelmintic treatment, the most prevalent genus was Haemonchus, followed by Trichostrongylus; the genus Oesophagostomum was not detected. The highest percentage of Haemonchus larvae was observed after treatment with ivermectin, followed by albendazole and levamisole. This study revealed the existence of gastrointestinal nematodes in sheep that present multiple resistance to all three main classes of anthelmintic drugs.
Collapse
Affiliation(s)
- Leandro Farias Batista
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil
| | - Laura Lúcia Dos Santos Oliveira
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil.
| | - Fredson Vieira E Silva
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil.
| | - Walter Dos Santos Lima
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Av. Presidente Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil.
| | - Cíntia Aparecida de Jesus Pereira
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Av. Presidente Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Raul Herberth Freitas Rocha
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil
| | - Izadora Souza Santos
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil
| | - José Alisson Dias Júnior
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil
| | - Cleison Augusto Alves
- Departamento de Ciências Agrárias, Universidade Estadual de Montes Claros (UNIMONTES), Av. Reinaldo Viana, s/n, São Vicente, 39.448-524 Janaúba, MG, Brazil
| |
Collapse
|
32
|
Specht S, Keiser J. Helminth infections: Enabling the World Health Organization Road Map. Int J Parasitol 2022:S0020-7519(22)00180-1. [PMID: 36549443 DOI: 10.1016/j.ijpara.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/19/2022] [Accepted: 10/25/2022] [Indexed: 12/24/2022]
Abstract
Helminthiases are considered among the most persistent public health problems. Control and/or elimination remains a global health challenge and the World Health Organization Road Map highlights critical gaps and actions required to reach the 2030 targets, among them the need for new and more effective treatment options. Stronger collaborations across different fields are required to reach these goals. The helminth elimination platform is one example of how knowledge of two different disease areas can be aligned to fuse expertise and break disease silos.
Collapse
Affiliation(s)
- Sabine Specht
- Drugs for Neglected Diseases Initiative, 15 Camille-Vidart, 1202 Geneva, Switzerland.
| | - Jennifer Keiser
- Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, P.O. Box, 4002, Basel, Switzerland; University of Basel, P.O. Box, 4003, Basel, Switzerland
| |
Collapse
|
33
|
Essential Oils as Novel Anthelmintic Drug Candidates. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238327. [PMID: 36500419 PMCID: PMC9735941 DOI: 10.3390/molecules27238327] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/19/2022] [Accepted: 11/20/2022] [Indexed: 12/02/2022]
Abstract
Helminths, with an estimated 1.5 billion annual global infections, are one of the major health challenges worldwide. The current strategy of the World Health Organization to prevent helminth infection includes increasing hygienic awareness, providing better sanitation and preventative anthelmintic drug therapy in vulnerable populations. Nowadays, anthelmintic drugs are used heavily in livestock, both in case of infection and as a preventative measure. However, this has led to the development of resistance against several of the most common drugs, such as levamisole, ivermectin and thiabendazole. As many as 70% of the livestock in developed countries now has helminths that are drug resistant, and multiple resistance is common. Because of this, novel anthelmintics are urgently needed to help combat large-scale production losses. Prior to this review, no comprehensive review of the anthelmintic effects of essential oils and their components existed. Multiple review articles have been published on the uses of a single plant and its extracts that only briefly touch upon their anthelmintic activity. This review aims to provide a detailed overview of essential oils and their components as anthelmintic treatment against a wider variety of helminths.
Collapse
|
34
|
Caña-Bozada V, Morales-Serna FN, Fajer-Ávila EJ, Llera-Herrera R. De novo transcriptome assembly and identification of G-Protein-Coupled-Receptors (GPCRs) in two species of monogenean parasites of fish. Parasite 2022; 29:51. [PMID: 36350193 PMCID: PMC9645230 DOI: 10.1051/parasite/2022052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 10/13/2022] [Indexed: 11/11/2022] Open
Abstract
Genomic resources for Platyhelminthes of the class Monogenea are scarce, despite the diversity of these parasites, some species of which are highly pathogenic to their fish hosts. This work aimed to generate de novo-assembled transcriptomes of two monogenean species, Scutogyrus longicornis (Dactylogyridae) and Rhabdosynochus viridisi (Diplectanidae), providing a protocol for cDNA library preparation with low input samples used in single cell transcriptomics. This allowed us to work with sub-microgram amounts of total RNA with success. These transcriptomes consist of 25,696 and 47,187 putative proteins, respectively, which were further annotated according to the Swiss-Prot, Pfam, GO, KEGG, and COG databases. The completeness values of these transcriptomes evaluated with BUSCO against Metazoa databases were 54.1% and 73%, respectively, which is in the range of other monogenean species. Among the annotations, a large number of terms related to G-protein-coupled receptors (GPCRs) were found. We identified 109 GPCR-like sequences in R. viridisi, and 102 in S. longicornis, including family members specific for Platyhelminthes. Rhodopsin was the largest family according to GRAFS classification. Two putative melatonin receptors found in S. longicornis represent the first record of this group of proteins in parasitic Platyhelminthes. Forty GPCRs of R. viridisi and 32 of S. longicornis that were absent in Vertebrata might be potential drug targets. The present study provides the first publicly available transcriptomes for monogeneans of the subclass Monopisthocotylea, which can serve as useful genomic datasets for functional genomic research of this important group of parasites.
Collapse
Affiliation(s)
- Víctor Caña-Bozada
- Centro de Investigación en Alimentación y Desarrollo, A.C. Unidad Mazatlán en Acuicultura y Manejo Ambiental Mazatlán Sinaloa 82112 Mexico
| | - F. Neptalí Morales-Serna
- Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Universidad Nacional Autónoma de México Mazatlán Sinaloa 82040 Mexico
| | - Emma J. Fajer-Ávila
- Centro de Investigación en Alimentación y Desarrollo, A.C. Unidad Mazatlán en Acuicultura y Manejo Ambiental Mazatlán Sinaloa 82112 Mexico
| | - Raúl Llera-Herrera
- Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Universidad Nacional Autónoma de México Mazatlán Sinaloa 82040 Mexico
| |
Collapse
|
35
|
Abdel‑Fatah OR, Arafa WM, Wahba AA, El‑Dakhly KM. Tegumental alterations and resistance of Fasciola gigantica adult worms exposed to flukicides in Egypt. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022. [DOI: 10.1186/s43088-022-00287-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The current study was designed to investigate the in vitro effect of commercially available fasciolicides; albendazole (40 and 400 µg/ml), triclabendazole, rafoxanide and nitroxynil (50 and 100 µg/ml, each) against Fasciola gigantica adult worms. For all, worms were incubated for 3 h. Worm's motility was macroscopically and microscopically detected. Reduction of egg deposition was estimated. Alterations of worm's cuticle post-treatments were recorded using scanning electron microscopy (SEM).
Results
Nitroxynil had the most flukicidal effect with mild movement quickly disappeared within 15 min post-treatment. It showed the highest egg reduction (88.3% and 95% at concentrations of 50 and 100 µg/ml, respectively). Findings of SEM showed severe furrowing and destruction of spines. In rafoxanide-treated group, the motility disappeared 75 min post-treatment, and the egg deposition was significantly (P ≤ 0.05) reduced to 70% and 85% at the same concentrations. Teguments showed thickening, moderate furrowing and destruction of the spines. Albendazole showed the lowest effect: the motility of the worms was observed till 160 min post-treatment and the egg reduction was 43% and 75% at the same concentrations. Interestingly, in albendazole-treated flukes, the tegument had severe furrowing and spines were completely sloughed. Similarly, in triclabendazole-treated flukes, worms motility was observed till 160 min post-treatment and the egg reduction was 76.6% and 88.3%. The tegument showed swelling and mild furrowing with moderately damaged spines.
Conclusions
Nitroxynil was the most potent flukicide inducing evidential cuticular changes. Although albendazole induced the most potent cuticular damage, it showed the lowest flukicidal effect. Further in vivo study to investigate resistance/susceptibility of Fasciola species in cattle and buffaloes will be carried out.
Collapse
|
36
|
Hamilton KM, Waghorn TS, de Waal T, Keane OM, Green P, Leathwick DM. In vitro evaluation of fitness parameters for isolates of Teladorsagia circumcincta resistant and susceptible to multiple anthelmintic classes. Vet Parasitol 2022; 310:109791. [PMID: 36049292 DOI: 10.1016/j.vetpar.2022.109791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022]
Abstract
Anthelmintic resistance (AR) is an ever increasing problem for the sheep industry. Several studies worldwide have investigated reversing the trend of increasing AR and documented evidence for reversion toward susceptibility has been found. The hypothesis that resistance mutations compromise parasite fitness was drawn from this evidence. The aim of this study was to assess whether there were measurable differences in the fitness of Teladorsagia circumcincta isolates depending on their AR status. Four isolates were selected for the trial based on their known resistance status; D and M were multi-drug resistant, and T and W were susceptible to the benzimidazole, levamisole, and macrocyclic lactone anthelmintic classes. A secondary aim was to develop a series of in vitro bioassays for assessing fitness characteristics of parasites. The in vitro assays included; the cold stress test measured the number of third stage larvae (L3) developing from eggs stored at 4 °C for different lengths of time. Larval aging measured the locomotory activity of L3 after storage at 30 °C for different lengths of time. The exsheathment assay measured the exsheathment percentage of L3. Larval Length used length as a proxy for fecundity. The egg hatch assay evaluated egg hatch rate in water at room temperature. All isolates exhibited a decrease in the number of L3 recovered after storage of eggs at 4 °C (p < 0.001). Storage of L3 at 30 °C significantly influenced the ability of L3 to migrate through a 20 µm sieve (p < 0.001), however, there were no differences between isolates (p > 0.05). Exsheathment rate was higher for isolate D in comparison to isolates M and W, and for isolate T compared to isolate W. Isolate W was significantly longer than all other isolates (p < 0.05), whilst isolate M was significantly longer than isolate D (p < 0.05). No significant differences were found between isolates in egg hatch (p > 0.05). Overall, the results do not support differences in fitness associated with anthelmintic resistance status, even though differences were seen between the isolates for some assays. This suggests there is considerable variation in fitness parameters between isolates, making it difficult to determine whether resistance genotypes come with lower fitness.
Collapse
Affiliation(s)
- Kyra M Hamilton
- Animal & Bioscience Department, Teagasc, Athenry, Co. Galway, Ireland; AgResearch, Grasslands Research Centre, Palmerston North 4442, New Zealand; School of Veterinary Medicine, University College Dublin, Dublin 4, Ireland.
| | - Tania S Waghorn
- AgResearch, Grasslands Research Centre, Palmerston North 4442, New Zealand
| | - Theo de Waal
- School of Veterinary Medicine, University College Dublin, Dublin 4, Ireland
| | - Orla M Keane
- Animal & Bioscience Department, Teagasc, Grange, Dunsany, Co. Meath, Ireland
| | - Peter Green
- AgResearch, Grasslands Research Centre, Palmerston North 4442, New Zealand
| | - Dave M Leathwick
- AgResearch, Grasslands Research Centre, Palmerston North 4442, New Zealand
| |
Collapse
|
37
|
Anthelmintic effect of a water soluble Moringa oleifera lectin in rodents experimentally infected with Haemonchus contortus. Parasitol Int 2022; 92:102656. [PMID: 36007704 DOI: 10.1016/j.parint.2022.102656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 08/10/2022] [Accepted: 08/19/2022] [Indexed: 11/22/2022]
Abstract
Allied to the problem of gastrointestinal parasites, especially Haemochus contortus, the use of lectins of plant origin has contributed to the research of alternative anthelmintics. The nematicidal effect of a water soluble Moringa oleifera lectin (WSMoL) was investigated in an experimental model with H. contortus infected Wistar rodents. Three concentrations were tested orally: 5 mg/kg, 2.5 mg/kg and 1 mg/kg. The reduction in the number of larvae recovered in the experimental groups was analyzed, as well as biochemical, hematological and histological parameters. Treatments with 5, 2.5 and 1 mg/kg of WSMoL reduced the number of larvae recovered of animals by 74.7%, 72.8% and 66%, respectively. Untreated infected animals had anemia, moderate mononuclear multifocal hepatitis, vascular congestion in the liver and kidneys, white pulp hyperplasia in the spleen, and presence of eosinophils in the intestine. Infected animals treated with 5 mg/kg of WSMoL showed liver with moderate bleeding, kidney with vascular congestion, spleen with white pulp hyperplasia and intestine with moderate presence of mononuclear cells. An increase in the serum level of glutamic pyruvic transaminase and a reduction in the level of hemoglobin (p < 0.001) were also observed in this group when compared to the uninfected group. However, the administered concentrations of 2.5 and 1 mg/kg of WSMoL were both satisfactory in terms of reducing the number of recovered larvae and not promoting negative changes in the biochemical, hematological and histological parameters evaluated. These results indicate an in vivo nematicidal effect of WSMoL on the H. contortus parasite.
Collapse
|
38
|
Antonopoulos A, Doyle SR, Bartley DJ, Morrison AA, Kaplan R, Howell S, Neveu C, Busin V, Devaney E, Laing R. Allele specific PCR for a major marker of levamisole resistance in Haemonchus contortus. Int J Parasitol Drugs Drug Resist 2022; 20:17-26. [PMID: 35970104 PMCID: PMC9399269 DOI: 10.1016/j.ijpddr.2022.08.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 08/04/2022] [Accepted: 08/04/2022] [Indexed: 12/14/2022]
Abstract
Haemonchus contortus is a haematophagous parasitic nematode that infects small ruminants and causes significant animal health concerns and economic losses within the livestock industry on a global scale. Treatment primarily depends on broad-spectrum anthelmintics, however, resistance is established or rapidly emerging against all major drug classes. Levamisole (LEV) remains an important treatment option for parasite control, as resistance to LEV is less prevalent than to members of other major classes of anthelmintics. LEV is an acetylcholine receptor (AChR) agonist that, when bound, results in paralysis of the worm. Numerous studies implicated the AChR sub-unit, ACR-8, in LEV sensitivity and in particular, the presence of a truncated acr-8 transcript or a deletion in the acr-8 locus in some resistant isolates. Recently, a single non-synonymous SNP in acr-8 conferring a serine-to-threonine substitution (S168T) was identified that was strongly associated with LEV resistance. Here, we investigate the role of genetic variation at the acr-8 locus in a controlled genetic cross between the LEV susceptible MHco3(ISE) and LEV resistant MHco18(UGA2004) isolates of H. contortus. Using single worm PCR assays, we found that the presence of S168T was strongly associated with LEV resistance in the parental isolates and F3 progeny of the genetic cross surviving LEV treatment. We developed and optimised an allele-specific PCR assay for the detection of S168T and validated the assay using laboratory isolates and field samples that were phenotyped for LEV resistance. In the LEV-resistant field population, a high proportion (>75%) of L3 encoded the S168T variant, whereas the variant was absent in the susceptible isolates studied. These data further support the potential role of acr-8 S168T in LEV resistance, with the allele-specific PCR providing an important step towards establishing a sensitive molecular diagnostic test for LEV resistance.
Collapse
Affiliation(s)
- Alistair Antonopoulos
- School of Veterinary Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom; Institute of Biodiversity, Animal Health, & Comparative Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom.
| | - Stephen R. Doyle
- Wellcome Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | | | | | | | - Sue Howell
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, USA
| | - Cedric Neveu
- Institut National de la Recherche Agronomique, Nouzilly, France
| | - Valentina Busin
- School of Veterinary Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Eileen Devaney
- Institute of Biodiversity, Animal Health, & Comparative Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Roz Laing
- Institute of Biodiversity, Animal Health, & Comparative Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom.
| |
Collapse
|
39
|
Konopka JK, Chatterjee P, LaMontagne C, Brown J. Environmental impacts of mass drug administration programs: exposures, risks, and mitigation of antimicrobial resistance. Infect Dis Poverty 2022; 11:78. [PMID: 35773680 PMCID: PMC9243877 DOI: 10.1186/s40249-022-01000-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 06/09/2022] [Indexed: 01/05/2023] Open
Abstract
Mass drug administration (MDA) of antimicrobials has shown promise in the reduction and potential elimination of a variety of neglected tropical diseases (NTDs). However, with antimicrobial resistance (AMR) becoming a global crisis, the risks posed by widespread antimicrobial use need to be evaluated. As the role of the environment in AMR emergence and dissemination has become increasingly recognized, it is likewise crucial to establish the role of MDA in environmental AMR pollution, along with the potential impacts of such pollution. This review presents the current state of knowledge on the antimicrobial compounds, resistant organisms, and antimicrobial resistance genes in MDA trials, routes of these determinants into the environment, and their persistence and ecological impacts, particularly in low and middle-income countries where these trials are most common. From the few studies directly evaluating AMR outcomes in azithromycin MDA trials, it is becoming apparent that MDA efforts can increase carriage and excretion of resistant pathogens in a lasting way. However, research on these outcomes for other antimicrobials used in MDA trials is sorely needed. Furthermore, while paths of AMR determinants from human waste to the environment and their persistence thereafter are supported by the literature, quantitative information on the scope and likelihood of this is largely absent. We recommend some mitigative approaches that would be valuable to consider in future MDA efforts. This review stands to be a valuable resource for researchers and policymakers seeking to evaluate the impacts of MDA.
Collapse
Affiliation(s)
- Joanna K Konopka
- The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
| | - Pranab Chatterjee
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Connor LaMontagne
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7431, USA
| | - Joe Brown
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7431, USA
| |
Collapse
|
40
|
Assessment of anthelmintic potentials of Myrtus communis against Haemonchus contortus and Heligmosomoides polygyrus. Exp Parasitol 2022; 240:108320. [PMID: 35779645 DOI: 10.1016/j.exppara.2022.108320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 06/25/2022] [Accepted: 06/26/2022] [Indexed: 11/20/2022]
Abstract
Anthelmintic resistance in grazing livestock systems has been spreading worldwide in prevalence and severity. Therefore, alternative measures including the use of herbal anthelmintic is considered as one of the successful approaches for the control of anthelmintic resistance. In the present report, we describe the chemical constituents of Myrtus communis essential oil, its in vitro anthelmintic effect against the most pathogenic gastrointestinal parasite of sheep; Haemonchus contortus and its in vivo anthelmintic potential using an in vivo gastrointestinal parasite model of rodents; i.e. Heligmosomoides polygyrus. Chromatographic analyzes of the essential oil (EO) extracted from the leaves of M. communis have shown that this oil was composed mainly of a α-pinene (33.59%), eucalyptol (23.85%) and limonene (14.70%). Regarding the in vitro anthelmintic potential, the ovicidal effect was confirmed in an egg hatch inhibition assay at IC50 = 0.7 mg/mL and with 95.83% of immobility of adult worm's after 8 h of exposure to 2 mg/mL of M. communis EO. The anthelmintic capacity of M. communis EO was also confirmed by in vivo assays conducted against the murine parasite H. polygyrus. In fact, at 1200 mg/kg bw of M. communis EO, a reduction of 99.70% in faecal egg counts was observed after 7 days of oral treatment, together with a 71.12% reduction in total worm counts. Based on the obtained results, M. communis EO showed relevant in vitro and in vivo anthelmintic effects against gastro-intestinal parasites.
Collapse
|
41
|
Suleiman M, Kounosu A, Murcott B, Dayi M, Pawluk R, Yoshida A, Viney M, Kikuchi T, Hunt VL. piRNA-like small RNAs target transposable elements in a Clade IV parasitic nematode. Sci Rep 2022; 12:10156. [PMID: 35710810 PMCID: PMC9203780 DOI: 10.1038/s41598-022-14247-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 06/03/2022] [Indexed: 12/02/2022] Open
Abstract
The small RNA (sRNA) pathways identified in the model organism Caenorhabditis elegans are not widely conserved across nematodes. For example, the PIWI pathway and PIWI-interacting RNAs (piRNAs) are involved in regulating and silencing transposable elements (TE) in most animals but have been lost in nematodes outside of the C. elegans group (Clade V), and little is known about how nematodes regulate TEs in the absence of the PIWI pathway. Here, we investigated the role of sRNAs in the Clade IV parasitic nematode Strongyloides ratti by comparing two genetically identical adult stages (the parasitic female and free-living female). We identified putative small-interfering RNAs, microRNAs and tRNA-derived sRNA fragments that are differentially expressed between the two adult stages. Two classes of sRNAs were predicted to regulate TE activity including (i) a parasite-associated class of 21-22 nt long sRNAs with a 5' uridine (21-22Us) and a 5' monophosphate, and (ii) 27 nt long sRNAs with a 5' guanine/adenine (27GAs) and a 5' modification. The 21-22Us show striking resemblance to the 21U PIWI-interacting RNAs found in C. elegans, including an AT rich upstream sequence, overlapping loci and physical clustering in the genome. Overall, we have shown that an alternative class of sRNAs compensate for the loss of piRNAs and regulate TE activity in nematodes outside of Clade V.
Collapse
Affiliation(s)
- Mona Suleiman
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK
| | - Asuka Kounosu
- Parasitology, Department of Infectious Dieses, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Ben Murcott
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK
| | - Mehmet Dayi
- Parasitology, Department of Infectious Dieses, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
- Forestry Vocational School, Duzce University, 81620, Duzce, Turkey
| | - Rebecca Pawluk
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK
| | - Akemi Yoshida
- Laboratory of Genomics, Frontier Science Research Center, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Mark Viney
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Taisei Kikuchi
- Parasitology, Department of Infectious Dieses, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan.
| | - Vicky L Hunt
- Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK.
| |
Collapse
|
42
|
Drug efficacy on zoonotic nematodes of the Anisakidae family - new metabolic data. Parasitology 2022; 149:1065-1077. [PMID: 35443901 PMCID: PMC10090616 DOI: 10.1017/s0031182022000543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In the Anisakidae family, there are nematodes, most of which are parasitic for important commercial fish species. Both public health risks and socio-economic problems are attributed to these parasites. Despite these concerns, knowledge of the metabolism of these parasites remains unknown. Therefore, the main objective of this study was to investigate the receptors of drugs and oxidative metabolic status of two Anisakidae species, Pseudoterranova decipiens (s. s.) and Contracaecum osculatum (s. s.), under the influence of anthelminthic drugs, ivermectin (IVM) and pyrantel (PYR), at different concentrations: 1.56, 3.125 and 6.25 μg mL−1 of culture medium for 3, 6, 9, 12 and 72 h. The mRNA expressions of the γ-aminobutyric acid receptor, acetylcholine receptor subunits, adenosine triphosphate-binding cassette transporters and antioxidative enzymes were determined. The total antioxidant capacity and glutathione S-transferase activity were also examined. To the best of the authors' knowledge, this is the first time that IVM and PYR have been tested against these parasitic nematodes.
Collapse
|
43
|
Airs PM, Vaccaro K, Gallo KJ, Dinguirard N, Heimark ZW, Wheeler NJ, He J, Weiss KR, Schroeder NE, Huisken J, Zamanian M. Spatial transcriptomics reveals antiparasitic targets associated with essential behaviors in the human parasite Brugia malayi. PLoS Pathog 2022; 18:e1010399. [PMID: 35390105 PMCID: PMC9017939 DOI: 10.1371/journal.ppat.1010399] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 04/19/2022] [Accepted: 02/25/2022] [Indexed: 01/24/2023] Open
Abstract
Lymphatic filariasis (LF) is a chronic debilitating neglected tropical disease (NTD) caused by mosquito-transmitted nematodes that afflicts over 60 million people. Control of LF relies on routine mass drug administration with antiparasitics that clear circulating larval parasites but are ineffective against adults. The development of effective adulticides is hampered by a poor understanding of the processes and tissues driving parasite survival in the host. The adult filariae head region contains essential tissues that control parasite feeding, sensory, secretory, and reproductive behaviors, which express promising molecular substrates for the development of antifilarial drugs, vaccines, and diagnostics. We have adapted spatial transcriptomic approaches to map gene expression patterns across these prioritized but historically intractable head tissues. Spatial and tissue-resolved data reveal distinct biases in the origins of known drug targets and secreted antigens. These data were used to identify potential new drug and vaccine targets, including putative hidden antigens expressed in the alimentary canal, and to spatially associate receptor subunits belonging to druggable families. Spatial transcriptomic approaches provide a powerful resource to aid gene function inference and seed antiparasitic discovery pipelines across helminths of relevance to human and animal health.
Collapse
Affiliation(s)
- Paul M. Airs
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Kathy Vaccaro
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Kendra J. Gallo
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Nathalie Dinguirard
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Zachary W. Heimark
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Nicolas J. Wheeler
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jiaye He
- Morgridge Institute for Research, Madison, Wisconsin, United States of America
| | - Kurt R. Weiss
- Morgridge Institute for Research, Madison, Wisconsin, United States of America
| | - Nathan E. Schroeder
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Jan Huisken
- Morgridge Institute for Research, Madison, Wisconsin, United States of America
- Department of Integrative Biology, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Mostafa Zamanian
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- * E-mail:
| |
Collapse
|
44
|
Charlier J, Bartley DJ, Sotiraki S, Martinez-Valladares M, Claerebout E, von Samson-Himmelstjerna G, Thamsborg SM, Hoste H, Morgan ER, Rinaldi L. Anthelmintic resistance in ruminants: challenges and solutions. ADVANCES IN PARASITOLOGY 2022; 115:171-227. [PMID: 35249662 DOI: 10.1016/bs.apar.2021.12.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Anthelmintic resistance (AR) is a growing concern for effective parasite control in farmed ruminants globally. Combatting AR will require intensified and integrated research efforts in the development of innovative diagnostic tests to detect helminth infections and AR, sustainable anthelmintic treatment strategies and the development of complementary control approaches such as vaccination and plant-based control. It will also require a better understanding of socio-economic drivers of anthelmintic treatment decisions, in order to support a behavioural shift and develop targeted communication strategies that promote the uptake of evidence-based sustainable solutions. Here, we review the state-of-the-art in these different fields of research activity related to AR in helminths of livestock ruminants in Europe and beyond. We conclude that in the advent of new challenges and solutions emerging from continuing spread of AR and intensified research efforts, respectively, there is a strong need for transnational multi-actor initiatives. These should involve all key stakeholders to develop indicators of infection and sustainable control, set targets and promote good practices to achieve them.
Collapse
Affiliation(s)
| | - D J Bartley
- Disease Control, Moredun Research Institute, Penicuik, United Kingdom
| | - S Sotiraki
- Veterinary Research Institute, Hellenic Agricultural Organisation ELGO-DIMITRA, Thessaloniki, Greece
| | - M Martinez-Valladares
- Instituto de Ganadería de Montaña (CSIC-Universidad de León), Departamento de Sanidad Animal, León, Spain
| | - E Claerebout
- Ghent University, Faculty of Veterinary Medicine, Laboratory of Parasitology, Merelbeke, Belgium
| | - G von Samson-Himmelstjerna
- Institute for Parasitology and Tropical Veterinary Medicine, Veterinary Centre for Resistance Research, Freie Universität Berlin, Berlin, Germany
| | - S M Thamsborg
- Veterinary Parasitology, University of Copenhagen, Frederiksberg C, Denmark
| | - H Hoste
- INRAE, UMR 1225 IHAP INRAE/ENVT, Toulouse University, Toulouse, France
| | - E R Morgan
- Institute for Global Food Security, Queen's University Belfast, Belfast, United Kingdom
| | - L Rinaldi
- University of Naples Federico II, Unit of Parasitology and Parasitic Diseases, Department of Veterinary Medicine and Animal Production, CREMOPAR, Napoli, Italy.
| |
Collapse
|
45
|
Babineau M, Collis E, Ruffell A, Bunch R, McNally J, Lyons RE, Kotze AC, Hunt PW. Selection of genome-wide SNPs for pooled allelotyping assays useful for population monitoring. Genome Biol Evol 2022; 14:6531970. [PMID: 35179579 PMCID: PMC8911822 DOI: 10.1093/gbe/evac030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2022] [Indexed: 11/13/2022] Open
Abstract
Parasitic worms are serious pests of humans, livestock and crops worldwide. Multiple management strategies are employed in order to reduce their impact, and some of these may affect their genome and population allelic frequency distribution. The evolution of chemical resistance, ecological changes, and pest dispersal have allowed an increasing number of pests to become difficult to control with current management methods. Their lifestyle limits the use of ecological and individual-based management of populations. There is a need to develop rapid, affordable, and simple diagnostics to assess the efficacy of management strategies and delay the evolution of resistance to these strategies. This study presents a multi-locus, equal-representation, whole genome pooled SNPs selection approach as a monitoring tool for the ovine nematode parasite Haemonchus contortus. The SNP selection method used two reference genomes of different quality, then validated these SNPs against a high-quality recent genome assembly. From over 11 million high-quality SNPs identified, 334 SNPs were selected, of which 262 were species-specific, yielded similar allele frequencies when assessed as multiple individuals or as pools of individuals, and suitable to distinguish mixed nematode isolate pools from single isolate pools. As a proof-of-concept, 21 Australian H. contortus populations with various phenotypes and genotypes were screened. This analysis confirmed the overall low-level of genetic differentiation between populations collected from the field, but clearly identifying highly inbred populations, and populations showing genetic signatures associated with chemical resistance. The analysis showed that 66% of the SNPs were necessary for stability in assessing population genetic patterns, and SNP pairs did not show linkage according to allelic frequencies across the 21 populations. This method demonstrates that ongoing monitoring of parasite allelic frequencies and genetic changes can be achieved as a management assessment tool to identify drug-treatment failure, population incursions, and inbreeding signatures due to selection. The SNP selection method could also be applied to other parasite species.
Collapse
Affiliation(s)
- M Babineau
- CSIRO Agriculture and Food, Armidale, Australia
| | - E Collis
- School of Veterinary Science, The University of Queensland, Gatton, Qld, 4343, Australia
| | - A Ruffell
- CSIRO Agriculture and Food, St-Lucia, Australia
| | - R Bunch
- CSIRO Agriculture and Food, Armidale, Australia
| | - J McNally
- CSIRO Agriculture and Food, Armidale, Australia
| | - R E Lyons
- School of Veterinary Science, The University of Queensland, Gatton, Qld, 4343, Australia
| | - A C Kotze
- CSIRO Agriculture and Food, St-Lucia, Australia
| | - P W Hunt
- CSIRO Agriculture and Food, Armidale, Australia
| |
Collapse
|
46
|
Wondimu A, Bayu Y. Anthelmintic Drug Resistance of Gastrointestinal Nematodes of Naturally Infected Goats in Haramaya, Ethiopia. J Parasitol Res 2022; 2022:4025902. [PMID: 35083085 PMCID: PMC8786542 DOI: 10.1155/2022/4025902] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/15/2021] [Accepted: 12/31/2021] [Indexed: 11/17/2022] Open
Abstract
Gastrointestinal parasites and their anthelmintic resistance are major constraints to goat production in Ethiopia. Experimental investigation by faecal egg count reduction test (FECRT) and larval cultures were used to assess the occurrence of anthelmintic resistance in naturally infected goats with gastrointestinal nematodes (GIN) in Haramaya, Ethiopia. One hundred goats with a minimum of 150 eggs per gram (EPG) count were selected and randomly divided into five groups, 20 goats in each group, four treated and one untreated group. The result of the faecal egg count reduction test percentage (FECRT%) and the lower 95% confidence limit showed the presence of anthelmintic resistance for all tested drugs except tetramisole. FECRT% and lower 95% confidence limit were 69.9% and 36.9 for albendazole, 84.3% and 66.1 for tetraclozan, 95.7% and 87.4 for tetramisole, and 71.1% and 38.2 for ivermectin, respectively. Trichostrongylus, Teladorsagia, and Haemonchus showed anthelmintic resistance for tested drugs. Coproculture from different treatment groups revealed Trichostrongylus (69.2% in ivermectin and 59.6% in albendazole) were the predominant nematode followed by Teladorsagia (21.9% in albendazole and 14.7% in ivermectin). In tetraclozan treatment group, Trichostrongylus (42%) and Teladorsagia (41.3%) were comparable, followed by Haemonchus (13%). In group treated with tetramisole, Teladorsagia (54.3%) were the most frequently detected nematode followed by Trichostrongylus (25.7%) and Haemonchus (11.4%). Therefore, this study demonstrated the presence of multidrug resistant nematodes that may limit the productivity of goats. Moreover, further studies covering wider areas of Ethiopia and mechanisms of nematode resistance need to be studied in the future.
Collapse
Affiliation(s)
- Anteneh Wondimu
- College of Agriculture and Natural Resource, Bonga University, P.O. Box 334, Bonga, Ethiopia
| | - Yehualashet Bayu
- College of Veterinary Medicine, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia
| |
Collapse
|
47
|
Walker M, Freitas LT, Halder JB, Brack M, Keiser J, King CH, Levecke B, Ai-Lian Lim Y, Pieri O, Sow D, Stothard JR, Webster JP, Zhou XN, Terry RF, Guérin PJ, Basáñez MG. Improving anthelmintic treatment for schistosomiasis and soil-transmitted helminthiases through sharing and reuse of individual participant data. Wellcome Open Res 2022; 7:5. [PMID: 35493199 PMCID: PMC9020536 DOI: 10.12688/wellcomeopenres.17468.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2021] [Indexed: 01/13/2023] Open
Abstract
The Infectious Diseases Data Observatory (IDDO, https://www.iddo.org) has launched a clinical data platform for the collation, curation, standardisation and reuse of individual participant data (IPD) on treatments for two of the most globally important neglected tropical diseases (NTDs), schistosomiasis (SCH) and soil-transmitted helminthiases (STHs). This initiative aims to harness the power of data-sharing by facilitating collaborative joint analyses of pooled datasets to generate robust evidence on the efficacy and safety of anthelminthic treatment regimens. A crucial component of this endeavour has been the development of a Research Agenda to promote engagement with the SCH and STH research and disease control communities by highlighting key questions that could be tackled using data shared through the IDDO platform. Here, we give a contextual overview of the priority research themes articulated in the Research Agenda-a 'living' document hosted on the IDDO website-and describe the three-stage consultation process behind its development. We also discuss the sustainability and future directions of the platform, emphasising throughout the power and promise of ethical and equitable sharing and reuse of clinical data to support the elimination of NTDs.
Collapse
Affiliation(s)
- Martin Walker
- Department of Pathobiology and Population Sciences, Royal Veterinary College, London, Hatfield, UK
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected Tropical Disease Research, Imperial College London, London, UK
- Infectious Diseases Data Observatory, University of Oxford, Oxford, UK
| | - Luzia T. Freitas
- Department of Pathobiology and Population Sciences, Royal Veterinary College, London, Hatfield, UK
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected Tropical Disease Research, Imperial College London, London, UK
- Infectious Diseases Data Observatory, University of Oxford, Oxford, UK
| | - Julia B. Halder
- Department of Pathobiology and Population Sciences, Royal Veterinary College, London, Hatfield, UK
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected Tropical Disease Research, Imperial College London, London, UK
- Infectious Diseases Data Observatory, University of Oxford, Oxford, UK
| | - Matthew Brack
- Infectious Diseases Data Observatory, University of Oxford, Oxford, UK
| | - Jennifer Keiser
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Charles H. King
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, Ohio, USA
| | - Bruno Levecke
- Department of Translational Physiology, Ghent University, Merelbeke, Belgium
| | - Yvonne Ai-Lian Lim
- Department of Parasitology, University of Malaya, Kuala Lumpur, Malaysia
| | - Otavio Pieri
- Laboratory of Health and Environment Education, Oswaldo Cruz Institute, Fiocruz, Rio de Janiero, Brazil
| | - Doudou Sow
- Service de Parasitologie, Université Gaston Berger de Saint Louis, Saint Louis, Senegal
| | - J. Russell Stothard
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Joanne P. Webster
- Department of Pathobiology and Population Sciences, Royal Veterinary College, London, Hatfield, UK
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected Tropical Disease Research, Imperial College London, London, UK
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, China Center for Disease Control and Prevention, Shanghai, China
| | - Robert F. Terry
- Special Programme for Research and Training in Tropical Diseases (TDR), World Health Organization, Geneva, Switzerland
| | | | - Maria-Gloria Basáñez
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected Tropical Disease Research, Imperial College London, London, UK
- Infectious Diseases Data Observatory, University of Oxford, Oxford, UK
| |
Collapse
|
48
|
Idris OA, Wintola OA, Afolayan AJ. Anthelmintic potency of Rumex crispus L. extracts against Caenorhabditis elegans and non-targeted identification of the bioactive compounds. Saudi J Biol Sci 2022; 29:541-549. [PMID: 35002450 PMCID: PMC8716969 DOI: 10.1016/j.sjbs.2021.09.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 09/03/2021] [Accepted: 09/09/2021] [Indexed: 11/09/2022] Open
Abstract
Traditional healers and ethnoveterinary therapists use several medicinal plants, such as Rumex crispus L., to treat endoparasite infections. R. crispus has been established by researchers to be effective agasint a few parasitic worms. In this study, we evaluated the potency of R. crispus extracts on the model organism, Caenorhabditis elegans and the bioactive compounds of the extracts were also identified. The solvent extracts of R. crispus were tested against C. elegans for up to 72 h. The effect of the extracts on C. elegans was examined using light microscopy (LM) and scanning electron microscopy (SEM). LM and SEM analysis showed damage on the body wall, reduced body and slight modifications of the nematode organs. The lethality test reveals a significant reduction in the viability of the nematode with the water extract of leaf (LF-WAE), among others, having the strongest potency against the nematode, with 83% lethality. Anlysis done with Fourier-transform infrared spectroscopy (FTIR) spectra reveals various characteristic vibration bands and fingerprint bands at 3400–600 cm−1, identifying phenols, organic acids, aromatics, amines, among others in the plant. The compounds were identified with liquid chromatography-mass spectrometry (LC-MS), under the categories of flavonoids, steroidal alkaloids and proanthocyanidin. In conclusion, this study confirmed that R. crispus has anthelmintic potential, using standardised C. elegans models as a tool and suggests that there could be novel compounds yet to be explored in the studied plant that could be of great benefit to livestock and humans.
Collapse
Affiliation(s)
- Oladayo Amed Idris
- Medicinal Plants and Economic Development (MPED) Research Centre, Department of Botany, University of Fort Hare, Alice 5700, South Africa.,Unit for Environmental Sciences and Management (UESM), Faculty of Natural and Agricultural Sciences, North-West University, Potchefstroom, North West, South Africa
| | - Olubunmi Abosede Wintola
- Medicinal Plants and Economic Development (MPED) Research Centre, Department of Botany, University of Fort Hare, Alice 5700, South Africa
| | - Anthony Jide Afolayan
- Medicinal Plants and Economic Development (MPED) Research Centre, Department of Botany, University of Fort Hare, Alice 5700, South Africa
| |
Collapse
|
49
|
Fissiha W, Kinde MZ. Anthelmintic Resistance and Its Mechanism: A Review. Infect Drug Resist 2021; 14:5403-5410. [PMID: 34938088 PMCID: PMC8687516 DOI: 10.2147/idr.s332378] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 11/25/2021] [Indexed: 11/27/2022] Open
Abstract
Helminths are a various types of parasites causing a major health problem for animals in different parts of the globe. Control of helminthiasis has largely relied on the use of pharmaceutical anthelmintics. Unfortunately, the exhaustive use of anthelmintic drugs has led to a serious and dramatic level of anthelmintic resistance. Anthelmintic resistance is a heritable loss of sensitivity of an anthelmintic in a parasite population that was in the past susceptible to the same anthelmintic. The development of anthelmintic resistance is evident to different helminths of almost every animal species and to different groups of anthelmintic in several continents. Frequent treatment, underdosing, genetics of the parasite, and targeting and timing of mass treatment are predisposing factors for anthelmintic resistance. Upregulation of cellular efflux mechanisms, an increase in drug metabolism, a change in drug receptor sites that reduces drug binding or the functional consequences of drug binding, and a decrease in drug receptor abundance through reduced expression within the parasite are the main mechanisms of anthelmintic resistance. In vivo method like fecal egg count reduction test and in vitro method such as egg hatch assays, larval motility test, larval development test and PCR can be used for the detection of anthelmintic resistance. Proper utilization of anthelmintic drugs, using combined anthelmintic and applying other alternatives are essential strategies to slow down the development of anthelmintic resistance. As anthelmintic resistance is a serious challenge throughout the world, proper utilization of the existing anthelmintics and reducing dependence on anthelmintics should be implemented to reduce its challenge.
Collapse
Affiliation(s)
- Workye Fissiha
- Department of Epidemiology and Public Health, College of Veterinary Medicine and Animal Sciences, University of Gondar, Gondar, Amhara Regional State, Ethiopia
| | - Mebrie Zemene Kinde
- Department of Veterinary Biomedical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, Gondar, Amhara Regional State, Ethiopia
| |
Collapse
|
50
|
Lautens MJ, Tan JH, Serrat X, Del Borrello S, Schertzberg MR, Fraser AG. Identification of enzymes that have helminth-specific active sites and are required for Rhodoquinone-dependent metabolism as targets for new anthelmintics. PLoS Negl Trop Dis 2021; 15:e0009991. [PMID: 34843467 PMCID: PMC8659336 DOI: 10.1371/journal.pntd.0009991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 12/09/2021] [Accepted: 11/11/2021] [Indexed: 11/18/2022] Open
Abstract
Soil transmitted helminths (STHs) are major human pathogens that infect over a billion people. Resistance to current anthelmintics is rising and new drugs are needed. Here we combine multiple approaches to find druggable targets in the anaerobic metabolic pathways STHs need to survive in their mammalian host. These require rhodoquinone (RQ), an electron carrier used by STHs and not their hosts. We identified 25 genes predicted to act in RQ-dependent metabolism including sensing hypoxia and RQ synthesis and found 9 are required. Since all 9 have mammalian orthologues, we used comparative genomics and structural modeling to identify those with active sites that differ between host and parasite. Together, we found 4 genes that are required for RQ-dependent metabolism and have different active sites. Finding these high confidence targets can open up in silico screens to identify species selective inhibitors of these enzymes as new anthelmintics.
Collapse
Affiliation(s)
- Margot J. Lautens
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
| | - June H. Tan
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
| | - Xènia Serrat
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
| | | | | | - Andrew G. Fraser
- The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
| |
Collapse
|