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Ding N, Zhang B, Khan IM, Qin M, Qi S, Dong X, Wang Z, Yang J. Dual pH- and ATP-Responsive Antibacterial Nanospray: On-Demand Release of Antibacterial Factors, Imaging Monitoring, and Accelerated Healing of Bacteria-Infected Wounds under NIR Activation. ACS APPLIED MATERIALS & INTERFACES 2024; 16:30728-30741. [PMID: 38847598 DOI: 10.1021/acsami.4c03587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
The prevalence of pathogenic bacterial infections with high morbidity and mortality poses a widespread challenge to the healthcare system. Therefore, it is imperative to develop nanoformulations capable of adaptively releasing antimicrobial factors and demonstrating multimodal synergistic antimicrobial activity. Herein, an NIR-activated multifunctional synergistic antimicrobial nanospray MXene/ZIF-90@ICG was prepared by incorporating ZIF-90@ICG nanoparticles onto MXene-NH2 nanosheets. MXene/ZIF-90@ICG can on-demand release the antimicrobial factors MXenes, ICG, and Zn2+ in response to variations in pH and ATP levels within the bacterial infection microenvironment. Under NIR radiation, the combination of MXenes, Zn2+, and ICG generated a significant amount of ROS and elevated heat, thereby enhancing the antimicrobial efficacy of PDT and PTT. Meanwhile, NIR excitation could accelerate the further release of ICG and Zn2+, realizing the multimodal synergistic antibacterial effect of PDT/PTT/Zn2+. Notably, introducing MXenes improved the dispersion of the synthesized antimicrobial nanoparticles in aqueous solution, rendering MXene/ZIF-90@ICG a candidate for application as a nanospray. Importantly, MXene/ZIF-90@ICG demonstrated antimicrobial activity and accelerated wound healing in the constructed in vivo subcutaneous Staphylococcus aureus infection model with NIR activation, maintaining a favorable biosafety level. Therefore, MXene/ZIF-90@ICG holds promise as an innovative nanospray for adaptive multimodal synergistic and efficient antibacterial applications with NIR activation.
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Affiliation(s)
- Ning Ding
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, P. R. China
| | - Bo Zhang
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, P. R. China
| | - Imran Mahmood Khan
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo 315100, P. R. China
| | - Mingwei Qin
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, P. R. China
| | - Shuo Qi
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, P. R. China
| | - Xiaoze Dong
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, P. R. China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, P. R. China
- National Engineering Research Center for Functional Food, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, P. R. China
- Teaching and Research Office of Food Safety, School of Public Course, Bengbu Medical University, Bengbu 233000, P. R. China
| | - Junsong Yang
- Teaching and Research Office of Food Safety, School of Public Course, Bengbu Medical University, Bengbu 233000, P. R. China
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Kou J, Li Y, Zhao Z, Qiao J, Zhang Q, Han X, Cheng X, Man S, Ma L. Simultaneous Dual-Gene Test of Methicillin-Resistant Staphylococcus Aureus using an Argonaute-Centered Portable and Visual Biosensor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311764. [PMID: 38506607 DOI: 10.1002/smll.202311764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Indexed: 03/21/2024]
Abstract
The development of novel method for drug-resistant bacteria detection is imperative. A simultaneous dual-gene Test of methicillin-resistant Staphylococcus aureus (MRSA) is developed using an Argonaute-centered portable biosensor (STAR). This is the first report concerning Argonaute-based pathogenic bacteria detection. Simply, the species-specific mecA and nuc gene are isothermally amplified using loop-mediated isothermal amplification (LAMP) technique, followed by Argonaute-based detection enabled by its programmable, guided, sequence-specific recognition and cleavage. With the strategy, the targeted nucleic acid signals gene are dexterously converted into fluorescent signals. STAR is capable of detecting the nuc gene and mecA gene simultaneously in a single reaction. The limit of detection is 10 CFU/mL with a dynamic range from 10 to 107 CFU/mL. The sample-to-result time is <65 min. This method is successfully adapted to detect clinical samples, contaminated foods, and MRSA-infected animals. This work broadens the reach of Argonaute-based biosensing and presents a novel bacterial point-of-need (PON) detection platform.
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Affiliation(s)
- Jun Kou
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Yaru Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Zhiying Zhao
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Jiali Qiao
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Qiang Zhang
- Branch of Tianjin Third Central Hospital, Tianjin, 300250, China
| | - Xiao Han
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Xinkuan Cheng
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Shuli Man
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Long Ma
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
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Yi XL, Yang WH, Zheng HL, Cao ML, Xiong J, Chen WC, Zhou YJ, Li F, Zhu XQ, Liu GH. Seroprevalence and molecular detection of Toxoplasma gondii and Neospora caninum in beef cattle and goats in Hunan province, China. Parasit Vectors 2024; 17:195. [PMID: 38671515 PMCID: PMC11055231 DOI: 10.1186/s13071-024-06283-9] [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: 01/08/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Toxoplasma gondii and Neospora caninum are closely related protozoan parasites that are considered important causes of abortion in livestock, causing huge economic losses. Hunan Province ranks 12th in the production of beef and mutton in China. However, limited data are available on the seroprevalence, risk factors and molecular characterization of T. gondii and N. caninum in beef cattle and goats in Hunan province, China. METHODS Sera of 985 beef cattle and 1147 goats were examined for the presence of specific antibodies against T. gondii using indirect hemagglutination test (IHAT) and anti-N. caninum IgG using competitive-inhibition enzyme-linked immunoassay assay (cELISA). Statistical analysis of possible risk factors was performed using PASW Statistics. Muscle samples of 160 beef cattle and 160 goats were examined for the presence of T. gondii DNA (B1 gene) and N. caninum DNA (Nc-5 gene) by nested PCR. The B1 gene-positive samples were genotyped at 10 genetic markers using the multilocus nested PCR-RFLP (Mn-PCR-RFLP). RESULTS Specific IgG against T. gondii were detected in 8.3% (82/985) and 13.3% (153/1147) and against N. caninum in 2.1% (21/985) and 2.0% (23/1147) of the beef cattle and goats, respectively. Based on statistical analysis, the presence of cats, semi-intensive management mode and gender were identified as significant risk factors for T. gondii infection in beef cattle. Age was a significant risk factor for T. gondii infection in goats (P < 0.05), and age > 3 years was a significant risk factor for N. caninum infection in beef cattle (P < 0.05). PCR positivity for T. gondii was observed in three beef samples (1.9%; 3/160) and seven chevon samples (4.4%; 7/160). Genotyping of PCR positive samples identified one to be ToxoDB#10. The N. caninum DNA was observed in one beef sample (0.6%; 1/160) but was negative in all chevon samples. CONCLUSIONS To our knowledge, this is the first large-scale serological and molecular investigation of T. gondii and N. caninum and assessment of related risk factors in beef cattle and goats in Hunan Province, China. The findings provide baseline data for executing prevention and control of these two important parasites in beef cattle and goats in China.
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Affiliation(s)
- Xi-Long Yi
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Wen-He Yang
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - He-Liang Zheng
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Mei-Ling Cao
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Jun Xiong
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Wen-Cheng Chen
- Chenzhou Center for Livestock Poultry and Aquatic Product Quality Inspection, Chenzhou, 423000, Hunan, People's Republic of China
| | - Yu-Jing Zhou
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Fen Li
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China
| | - Xing-Quan Zhu
- Laboratory of Parasitic Diseases, College of Veterinary Medicine, Shanxi Agricultural University, Taigu, 030801, Shanxi, People's Republic of China.
| | - Guo-Hua Liu
- Research Center for Parasites & Vectors, College of Veterinary Medicine, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.
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Li Y, Tang X, Wang N, Zhao Z, Man S, Zhu L, Ma L. Argonaute-DNAzyme tandem biosensing for highly sensitive and simultaneous dual-gene detection of methicillin-resistant Staphylococcus aureus. Biosens Bioelectron 2024; 244:115758. [PMID: 37931440 DOI: 10.1016/j.bios.2023.115758] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 11/08/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA), a common zoonotic multidrug-resistant bacterium, puts a great threat to public health and food safety. Rapid and reliable detection of MRSA is crucial to guide effective patient treatment at early stages of infection and control the spread of MRSA infections. Herein, we developed a Simultaneous dual-gene and ulTra-sensitive detection for methicillin-resistant Staphylococcus aureus using Argonaute-DNAzyme tandem Detection (STAND). Simply, loop-mediated isothermal amplification (LAMP) was used for the amplification of the species-specific mecA and nuc gene, followed by STAND enabled by the site-specific cleavage of programable Argonaute. The Argonaute-DNAzyme tandem reaction rendered a conceptually novel signal amplification and transduction module that was more sensitive (1 or 2 order of magnitude higher) than the original Argonaute-based biosensing. With the strategy, the target nucleic acid signals gene were dexterously converted into fluorescent signals. STAND could detect the nuc gene and mecA gene simultaneously in a single reaction with 1 CFU/mL MRSA and a dynamic range from 1 to 108 CFU/mL. This method was confirmed by clinical samples and challenged by identifying contaminated foods and MRSA-infected animals. This work enriches the arsenal of Argonaute-mediated biosensing and presents a novel biosensing strategy to detect pathogenic bacteria with ultra-sensitivity, specificity and on-site capability.
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Affiliation(s)
- Yaru Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Xiaoqin Tang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Nan Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Zhiying Zhao
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Shuli Man
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China.
| | - Lei Zhu
- Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, China.
| | - Long Ma
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China.
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Ramlal A, Nautiyal A, Kumar J, Mishra V, Sogan N, Nasser B. Singab A. Botanicals against some important nematodal diseases: Ascariasis and hookworm infections. Saudi J Biol Sci 2023; 30:103814. [PMID: 37841664 PMCID: PMC10570706 DOI: 10.1016/j.sjbs.2023.103814] [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: 06/24/2023] [Revised: 08/26/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023] Open
Abstract
Ascariasis and intestinal parasitic nematodes are the leading cause of mass mortality infecting many people across the globe. In light of the various deleterious side effects of modern chemical-based allopathic drugs, our preferences have currently shifted towards the use of traditional plant-based drugs or botanicals for treating diseases. The defensive propensities in the botanicals against parasites have probably evolved during their co-habitation with parasites, humans and plants in nature and hence their combative interference in one another's defensive mechanisms has occurred naturally ultimately being very effective in treating diseases. This article broadly outlines the utility of plant-based compounds or botanicals prepared from various medicinal herbs that have the potential to be developed as effective therapies against the important parasites causing ascariasis and intestinal hookworm infections leading to ascariasis & infections and thereby human mortality, wherein allopathic treatments are less effective and causes enormous side-effects.
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Affiliation(s)
- Ayyagari Ramlal
- Division of Genetics, ICAR-Indian Agricultural Research Institute (IARI), Pusa Campus, New Delhi, Delhi, India 110012
- School of Biological Sciences, Universiti Sains Malaysia (USM), Georgetown, Penang, Malaysia 11800
| | - Aparna Nautiyal
- Department of Botany, Deshbandhu College, University of Delhi, Delhi, India 110019
| | - Jitendra Kumar
- Bangalore Bioinnovation Centre, Life Sciences Park, Electronics City Phase 1, Bengaluru, Karnataka, India 560100
- Biotechnology Industry Research Assistance Council (BIRAC), First Floor, MTNL Building, 9 Lodhi Road, CGO Complex, Pragati Vihar, New Delhi, Delhi, India 110003
| | - Vachaspati Mishra
- Department of Botany, Deen Dayal Upadhyay College, University of Delhi, Dwarka, Delhi, India 110078
| | - Nisha Sogan
- Department of Botany, Deshbandhu College, University of Delhi, Delhi, India 110019
| | - Abdel Nasser B. Singab
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt 11156
- Centre of Drug Discovery Research and Development, Ain Shams University, Abbasia, Cairo, Egypt
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Periferakis AT, Periferakis A, Periferakis K, Caruntu A, Badarau IA, Savulescu-Fiedler I, Scheau C, Caruntu C. Antimicrobial Properties of Capsaicin: Available Data and Future Research Perspectives. Nutrients 2023; 15:4097. [PMID: 37836381 PMCID: PMC10574431 DOI: 10.3390/nu15194097] [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: 08/26/2023] [Revised: 09/13/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
Capsaicin is a phytochemical derived from plants of the genus Capsicum and subject of intensive phytochemical research due to its numerous physiological and therapeutical effects, including its important antimicrobial properties. Depending on the concentration and the strain of the bacterium, capsaicin can exert either bacteriostatic or even bactericidal effects against a wide range of both Gram-positive and Gram-negative bacteria, while in certain cases it can reduce their pathogenicity by a variety of mechanisms such as mitigating the release of toxins or inhibiting biofilm formation. Likewise, capsaicin has been shown to be effective against fungal pathogens, particularly Candida spp., where it once again interferes with biofilm formation. The parasites Toxoplasma gondi and Trypanosoma cruzi have been found to be susceptible to the action of this compound too while there are also viruses whose invasiveness is significantly dampened by it. Among the most encouraging findings are the prospects for future development, especially using new formulations and drug delivery mechanisms. Finally, the influence of capsaicin in somatostatin and substance P secretion and action, offers an interesting array of possibilities given that these physiologically secreted compounds modulate inflammation and immune response to a significant extent.
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Affiliation(s)
- Aristodemos-Theodoros Periferakis
- Department of Physiology, The “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Elkyda, Research & Education Centre of Charismatheia, 17675 Athens, Greece
| | - Argyrios Periferakis
- Department of Physiology, The “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Elkyda, Research & Education Centre of Charismatheia, 17675 Athens, Greece
- Akadimia of Ancient Greek and Traditional Chinese Medicine, 16675 Athens, Greece
| | - Konstantinos Periferakis
- Akadimia of Ancient Greek and Traditional Chinese Medicine, 16675 Athens, Greece
- Pan-Hellenic Organization of Educational Programs (P.O.E.P), 17236 Athens, Greece
| | - Ana Caruntu
- Department of Oral and Maxillofacial Surgery, “Carol Davila” Central Military Emergency Hospital, 010825 Bucharest, Romania
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, “Titu Maiorescu” University, 031593 Bucharest, Romania
| | - Ioana Anca Badarau
- Department of Physiology, The “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Ilinca Savulescu-Fiedler
- Department of Internal Medicine and Cardiology, Coltea Clinical Hospital, 030167 Bucharest, Romania
- Department of Internal Medicine, The “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Cristian Scheau
- Department of Physiology, The “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Department of Radiology and Medical Imaging, “Foisor” Clinical Hospital of Orthopaedics, Traumatology and Osteoarticular TB, 021382 Bucharest, Romania
| | - Constantin Caruntu
- Department of Physiology, The “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Department of Dermatology, ‘Prof. N.C. Paulescu’ National Institute of Diabetes, Nutrition and Metabolic Diseases, 011233 Bucharest, Romania
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Zulu G, Mwape KE, Welte TM, Simuunza MC, Hachangu A, Mutale W, Chembensofu M, Sikasunge CS, Phiri IK, Winkler AS. Community knowledge, attitudes and practices related to Taenia solium taeniosis and cysticercosis in Zambia. PLoS Negl Trop Dis 2023; 17:e0011375. [PMID: 37561784 PMCID: PMC10443877 DOI: 10.1371/journal.pntd.0011375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/22/2023] [Accepted: 07/30/2023] [Indexed: 08/12/2023] Open
Abstract
BACKGROUND Several studies on Taenia solium taeniosis / cysticercosis (TSTC) have been conducted in Zambia. However, none has assessed community knowledge, attitudes and practices related to TSTC and epilepsy. METHODS A community-based cross-sectional study was conducted between November and December 2022. The design consisted of a questionnaire-based survey conducted in each of the 25 purposely selected villages in Chiparamba Rural Health Centre (RHC) catchment area in Chipata district of the Eastern Province. RESULTS A total of 588 participants comprising 259 (44%) males and 329 (56%) females with median age of 42 years (range 17 to 92 years) were interviewed. Awareness of the signs and symptoms of taeniosis and human cysticercosis (HCC), including transmission and prevention measures was very low. Whilst the majority had heard about epilepsy, they were not able to link HCC to epilepsy. Most participants were aware of cysticerci in pigs (PCC) including its predilection sites but were not aware of mode of transmission and prevention measures. The pork meat inspection by trained professionals was also not a common practice in the area. Risk perception of T. solium infections was thus very low. Overall knowledge, attitude and practice scores related to T. solium infections and to epilepsy were very low with median scores of 0.38 (IQR 0.25-0.54) for knowledge, 0.25 (0.25-0.50) for attitudes, and 0.31 (0.25-0.44) for practices. Males had better knowledge on TSTC (median = 0.42, p = 0.017, r = 0.098) and better practice scores (median = 0.38, p = < 0.001, r = 0.154) compared to females though the effect size was small. With regards to sanitation and hygiene washing with soap and water was reported by many but only few had a hand washing facility near their latrines. CONCLUSION The study shows overall poor knowledge, attitudes and practices related to TSTC among the community of Chiparamba RHC in Chipata district of the Eastern Province of Zambia. This poses a serious challenge for control and elimination of T. solium infections and thus efforts to improve knowledge, attitudes and practices should be made using a One Health approach for the control and elimination of TSTC. Educational programs about TSTC transmission, signs and symptoms, prevention, management and control need to be scaled up in the study area and Zambia as a whole.
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Affiliation(s)
- Gideon Zulu
- Ministry of Health, Government of the Republic of Zambia
- Department of Clinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Kabemba E. Mwape
- Department of Clinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Tamara M. Welte
- Department of Neurology, Center for Global Health, Faculty of Medicine, Technical University of Munich, Munich, Germany
- Epilepsy Center, Department of Neurology, University Hospital Erlangen, Erlangen, Germany
| | - Martin C. Simuunza
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Alex Hachangu
- Department of Clinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Wilbroad Mutale
- Department of Public Health, School of Medicine, University of Zambia, Lusaka, Zambia
| | - Mwelwa Chembensofu
- Department of Paraclinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Chummy S. Sikasunge
- Department of Paraclinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Isaac K. Phiri
- Department of Clinical Studies, School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - Andrea S. Winkler
- Department of Neurology, Center for Global Health, Faculty of Medicine, Technical University of Munich, Munich, Germany
- Department of Community Medicine and Global Health, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
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8
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Li Y, Kou J, Han X, Qiao J, Zhang W, Man S, Ma L. Argonaute-triggered visual and rebuilding-free foodborne pathogenic bacteria detection. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131485. [PMID: 37149945 DOI: 10.1016/j.jhazmat.2023.131485] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/15/2023] [Accepted: 04/23/2023] [Indexed: 05/09/2023]
Abstract
Foodborne pathogenic bacteria are recognized as the main causes of microbial contamination in food safety. Early screening and ultrasensitive detection of foodborne pathogenic bacteria is critical procedure to guarantee food safety. Argonaute is emerging as a new tool for detection owing to the programmability and high specificity. We reported a Novel and One-step cleavage method based on Argonaute by integrating Tag-specific primer extension and Exonuclease I (Exo I) for the first time, termed as NOTE-Ago. In this method, the invA of Salmonella typhi and nuc gene of Staphylococcus aureus were amplified using Tag-specific primer and the remaining primers were digested by Exo I. Then amplicons were served as the guide DNA for PfAgo. Consequently, the fluorophore-quencher reporter could be cleaved via PfAgo, resulting in changes in fluorescent intensity. With this strategy, target nucleic acid could be dexterously converted into fluorescent signals. The NOTE-Ago assay could detect 1 CFU/mL with a dynamic range from 1 to 108 CFU/mL. The satisfactory selectivity of NOTE-Ago assay further facilitated its application for detecting S. typhi- and S. aureus-contaminated food samples. This work enriches the toolbox of Argonaute-based detection and provides a one-step cleavage and rebuilding-free method for ultrasensitive detection of bacteria.
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Affiliation(s)
- Yaru Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Jun Kou
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Xiao Han
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Jiali Qiao
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Wenlu Zhang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Shuli Man
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China.
| | - Long Ma
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Microbiology, Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, National and Local United Engineering Lab of Metabolic Control Fermentation Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China.
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9
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The worldwide prevalence of intestinal helminthic parasites among food handlers: A systematic review and meta-analysis. Food Control 2023. [DOI: 10.1016/j.foodcont.2023.109658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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10
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Pathogenic parasites in vegetables in the Middle East and North Africa: Occurrence of Ascaris eggs and Giardia cysts, and epidemiological implications. Food Control 2023. [DOI: 10.1016/j.foodcont.2022.109323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Nguyen Thu H, Dermauw V, Tran Huy T, Roucher C, Dorny P, Nguyen Thi H, Trung KH, Dao Van T, Do Nhu B, Nguyen Kim T. Diagnosing Human Fascioliasis Using ELISA Immunoassays at a Tertiary Referral Hospital in Hanoi: A Cross-Sectional Study. Trop Med Infect Dis 2022; 7:76. [PMID: 35622703 PMCID: PMC9147183 DOI: 10.3390/tropicalmed7050076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 11/16/2022] Open
Abstract
Infections with the zoonotic liver flukes Fasciola gigantica and Fasciola hepatica may result in severe disease in humans. In Vietnam, an emergence of fascioliasis cases has been observed from the late 1990s onwards. Various diagnostic tools are used in the country, but the agreement between these tools has not been critically evaluated. We aimed to describe the clinical presentation and diagnostic outcomes in fascioliasis patients in Vietnam. A retrospective, cross-sectional study was conducted on the medical records of a group of 145 patients diagnosed with fascioliasis at a tertiary referral hospital in Hanoi. Based on the review, sociodemographic background and clinical presentation were recorded. These patients all received standard routine serologic tests, including internal antibody (Ab)-ELISA, an enzyme-linked immunosorbent assay (ELISA), and commercial coproantigen (cAg)-ELISA. The majority of cases were between 30 and 59 years old (68.3%), and about half of them were male (51.0%). Upper quadrant and epigastric pain were the most commonly reported symptoms (61.4% and 35.2%, respectively). All but one patient had liver lesions upon ultrasound examination (99.3%), and eosinophilia was present in most of the patients (89.7%). A high number of patients were positive in the in-house and the commercial Ab-ELISA (95.9% and 87.4%, respectively), yet only a slight agreement was observed between the two tests (kappa coefficient, 0.06). A further 47.4% of cases were positive for the commercial cAg-ELISA, whereas stool microscopy indicated the presence of Fasciola spp. eggs in 25.7% of patients. The current study emphasizes the challenges related to the diagnosis of human fascioliasis in Vietnam.
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Affiliation(s)
- Huong Nguyen Thu
- Department of Microbiology-Parasitology, Faculty of Basic Medicine, Hanoi University of Public Health, Hanoi 11900, Vietnam;
| | - Veronique Dermauw
- Department of Biomedical Sciences, Institute of Tropical Medicine, 2180 Antwerp, Belgium; (V.D.); (C.R.); (P.D.)
| | - Tho Tran Huy
- National Institute of Malariology, Parasitology and Entomology, Hanoi 12000, Vietnam;
| | - Clémentine Roucher
- Department of Biomedical Sciences, Institute of Tropical Medicine, 2180 Antwerp, Belgium; (V.D.); (C.R.); (P.D.)
| | - Pierre Dorny
- Department of Biomedical Sciences, Institute of Tropical Medicine, 2180 Antwerp, Belgium; (V.D.); (C.R.); (P.D.)
- Department of Virology, Parasitology and Immunology, 9820 Merelbeke, Belgium
| | - Hoai Nguyen Thi
- Department of Informatic Science, Vietnam Military Medical University, Hanoi 12108, Vietnam;
| | - Kien Hoang Trung
- Department of Immunology, Vietnam Military Medical University, Hanoi 12108, Vietnam;
| | - Thang Dao Van
- Department of Infectious Disease, Military Hospital 103, Hanoi 12108, Vietnam;
| | - Binh Do Nhu
- Department of Infectious Disease, Military Hospital 103, Hanoi 12108, Vietnam;
| | - Thu Nguyen Kim
- Department of Infectious Disease, Hanoi Medical University, Hanoi 11520, Vietnam
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12
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Amponsah IK, Boakye A, Orman E, Armah FA, Borquaye LS, Adjei S, Dwamena YA, Baah KA, Harley BK. Assessment of some quality parameters and chemometric-assisted FTIR spectral analysis of commercial powdered ginger products on the Ghanaian market. Heliyon 2022; 8:e09150. [PMID: 35846447 PMCID: PMC9280518 DOI: 10.1016/j.heliyon.2022.e09150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/02/2021] [Accepted: 03/16/2022] [Indexed: 11/29/2022] Open
Abstract
Background Zingiber officinale Roscoe (ginger) rhizome is a global spice with marked pharmacological activities and industrial applications. The demand for the powdered spice soared in the wake of the COVID-19 global pandemic. The present study sought to assess powdered ginger products on the Ghanaian market for some quality parameters and compare their chemical composition via chemometric analysis of their FT-IR data. Methods A survey was conducted in three major markets in Ghana to determine the commercially available powdered ginger products. These products were purchased and assessed for microbial load, heavy metals contents and ash values using official methods. Also, principal component and hierarchical cluster analysis, as multivariate algorithms, were applied to their FT-IR spectral fingerprints, using Z. officinale, Z. zerumbet and some dried ginger rhizomes from Nigeria as reference samples. Results Seven products were found in the survey: three local and four foreign. The local products failed to meet regulatory label requirements. The microbial load, heavy metals and ash values of all commercial samples were generally within specifications except for the aerobic bacterial counts of some local samples. Pharmacopoeial identity test and the chemometric analysis revealed all the products to contain Z. officinale. The reference ginger sample from Nigeria also demonstrated some level of similarity with Z. officinale. The variations in physical attributes and slight difference in chemical composition of the different products was presumed to be due to chemical changes arising from different processing methods and possible adulteration with other flours. Conclusion The sampled ginger products on the market originate from Z. officinale and have quality attributes that make them suitable for food and medicinal applications. The observed deviations, however, suggest an urgent need for standardized processing methods to ensure consistency in quality indices, as well as regular quality checks by regulatory bodies.
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Affiliation(s)
- Isaac Kingsley Amponsah
- Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
- Corresponding author.
| | - Abena Boakye
- Department of Food Science and Technology, Faculty of Biosciences, Kwame Nkrumah University of Science and Technology, Ghana
| | - Emmanuel Orman
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Health and Allied Sciences, Ho, Ghana
| | - Francis Ackah Armah
- Department of Biomedical Sciences, Faculty of Allied Sciences, College of Health and Allied Health Sciences, University of Cape Coast, Ghana
| | | | - Silas Adjei
- Department of Herbal Medicine, Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Yaa Afrakoma Dwamena
- Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Kennedy Ameyaw Baah
- Department of Chemistry, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Benjamin Kingsley Harley
- Department of Pharmacognosy and Herbal Medicine, School of Pharmacy, University of Health and Allied Sciences, Ho, Ghana
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13
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Oliveira LM, Oliveira YLDC, Oliveira YLM, Ramos ACS, Andrade GF, Sá VL, Geraldi RM, Pinheiro CS, Bueno LL, Fujiwara RT, Dolabella SS. Intestinal polyparasitism and levels of mucosal anthelmintic SIgA in children from endemic areas in Northeastern Brazil. Parasite Immunol 2021; 44:e12899. [PMID: 34861047 DOI: 10.1111/pim.12899] [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: 09/01/2021] [Revised: 11/20/2021] [Accepted: 11/29/2021] [Indexed: 11/29/2022]
Abstract
Interactions between parasites during co-infections are often complex and can impact immunization and treatment programmes, as well as disease outcomes and morbidity. However, little is known about these interactions and the mechanisms involved. In this study, a coproparasitological survey was carried out in school-age children living in endemic areas of parasitic infection in the state of Sergipe, Northeastern Brazil. Anti-helminth-specific and total secretory immunoglobulin-A (SIgA) levels were measured in stool and saliva samples and were compared in children presenting monoparasitism, polyparasitism (helminths and/or intestinal protozoa) and no infections. The survey showed that protozoa were more prevalent than helminths, and that there was a high frequency of polyparasitism in the studied population, mainly from combinations of protozoan species. Although less frequent, combinations between species of protozoa and helminths were also observed. The levels of salivary SIgA in these co-infected individuals were lower than the average observed in infections with helminths alone. Although the children participating in this survey were asymptomatic, and it was, therefore, not possible to evaluate the impact of salivary SIgA reduction on the diseases, and the study highlights the need for further investigations of co-infections by intestinal parasites and the effects on immune response induced by the interactions between different parasites.
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Affiliation(s)
- Luciana M Oliveira
- Postgraduate Program in Parasite Biology, Universidade Federal de Sergipe, São Cristóvão, Brazil.,Department of Morphology, Universidade Federal de Sergipe, São Cristovão, Brazil
| | - Yvanna L D C Oliveira
- Postgraduate Program in Pharmaceutical Sciences, Universidade Federal de Sergipe, São Cristóvão, Brazil
| | - Yrna L M Oliveira
- Postgraduate Program in Parasite Biology, Universidade Federal de Sergipe, São Cristóvão, Brazil
| | - Anne Caroline S Ramos
- Postgraduate Program in Parasite Biology, Universidade Federal de Sergipe, São Cristóvão, Brazil
| | - Gabriela F Andrade
- Department of Morphology, Universidade Federal de Sergipe, São Cristovão, Brazil
| | - Vitor L Sá
- Department of Morphology, Universidade Federal de Sergipe, São Cristovão, Brazil
| | - Ricardo M Geraldi
- Department of Morphology, Universidade Federal de Sergipe, São Cristovão, Brazil
| | - Carina S Pinheiro
- Department of Biointeraction, Institute of Health Sciences, Universidade Federal da Bahia, Salvador, Brazil
| | - Lilian L Bueno
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ricardo T Fujiwara
- Postgraduate Program in Parasite Biology, Universidade Federal de Sergipe, São Cristóvão, Brazil.,Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Silvio S Dolabella
- Postgraduate Program in Parasite Biology, Universidade Federal de Sergipe, São Cristóvão, Brazil.,Department of Morphology, Universidade Federal de Sergipe, São Cristovão, Brazil
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14
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Ibrahim HS, Salem AI, Ahmed NMAER, El-Taweel HA. Pre-and post-treatment evaluation of intestinal inflammation in Giardia and Blastocystis infected children: a community-based study. J Parasit Dis 2021; 45:1026-1033. [PMID: 34789986 DOI: 10.1007/s12639-021-01398-7] [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: 03/08/2021] [Accepted: 04/23/2021] [Indexed: 10/21/2022] Open
Abstract
Giardia intestinalis and Blastocystis hominis cause frequent infections in children in developing countries. However, the role of intestinal inflammation in their pathogenesis is still poorly understood. Faecal calprotectin (FC) level is used as an indicator of intestinal inflammation and neutrophil migration in the intestinal tract. The present study aimed to evaluate intestinal inflammation by measuring FC level among children infected with either G. intestinalis or B. hominis before and after treatment. Stool samples were collected from 282 children inhabiting a rural area in Egypt and examined microscopically for intestinal parasites. FC level was estimated in a group of children infected with G. intestinalis (n = 12) or B. hominis (n = 12) before and 3 weeks after receiving nitazoxanide (200 mg twice daily for 3 days) and compared to a control group (n = 18) of parasite-free children. Cases of mixed infection were excluded. Nitazoxanide cure rate was 83% in both infections with a remarkable reduction of infection intensity in uncured children. The difference in FC levels between infected children and controls was not statistically significant. Also, the difference between the pre- and post-treatment estimations was not statistically significant. Elevated levels were observed before treatment in three children (two infected with G. intestinalis and one with B. hominis) who displayed normal post-treatment levels. Although G. intestinalis and B. hominis infections appear to cause no remarkable intestinal inflammation, they may induce abnormally elevated FC levels in a subset of children.
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Affiliation(s)
- Heba Said Ibrahim
- Parasitology Department, Medical Research Institute, Alexandria University, Alexandria, Egypt
| | - Aziza Ibrahim Salem
- Parasitology Department, Medical Research Institute, Alexandria University, Alexandria, Egypt
| | | | - Hend Aly El-Taweel
- Parasitology Department, Medical Research Institute, Alexandria University, Alexandria, Egypt
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15
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Liu X, Wu M, Liu Y, Li J, Yang D, Jiang L. Foodborne Parasites Dominate Current Parasitic Infections in Hunan Province, China. Front Cell Infect Microbiol 2021; 11:774980. [PMID: 34722349 PMCID: PMC8551805 DOI: 10.3389/fcimb.2021.774980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 09/22/2021] [Indexed: 11/13/2022] Open
Abstract
Great progress has been made in the prevention and treatment of human parasitic diseases in China over the past six decades, but parasitic diseases are still one of the most serious public health problems in the world. The specific prevalence of parasitic diseases varies in different provinces due to their geographical environment and the dietary habits of people. In this study, a total of 4,428 patients suspected to have parasitic infection by clinicians or themselves from January 1, 2016, to December 31, 2020 were recommended to our laboratory for further testing. In total, 5,246 samples including fecal, blood, and other body fluids were detected by etiological and immunological methods. Approximately 15.20% (673/4,428) of all suspected patients were infected by at least one species of parasite, and the overall positive rate of suspected patients from Hunan Province was 15.10% (594/3,933). A total of 18 species of parasites, namely, nematodes (4 species), trematodes (5 species), cestodes (4 species), protozoa (2 species), and medical arthropods (3 species), and 3 of them were imported parasites outside of Hunan Province. There are 9 species of foodborne parasites, accounting for 89.92% (464/516) of patients infected by one species of parasite. Common parasites in Hunan Province include plerocercoid, Paragonimus westermani, Clonorchis sinensis, cysticercus, Toxoplasma gondii, and Schistosoma japonicum. In this study, we found that the incidence of soilborne nematode infections has decreased significantly. However, foodborne parasites gradually become the main parasitic infections as well as multiple infections are becoming more common. Therefore, we should not only continue the prevention and control of soil-derived nematodes but also focus on the prevention and control of foodborne parasites in the future.
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Affiliation(s)
- Xiaohua Liu
- Department of Parasitology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Mengqi Wu
- Department of Parasitology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Yuan Liu
- Department of Parasitology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Jing Li
- Department of Parasitology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Dongqian Yang
- Department of Parasitology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Liping Jiang
- Department of Parasitology, Xiangya School of Medicine, Central South University, Changsha, China.,China-Africa Research Center of Infectious Diseases, Xiangya School of Medicine, Central South University, Changsha, China
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16
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Taghipour A, Ghodsian S, Jabbari M, Olfatifar M, Abdoli A, Ghaffarifar F. Global prevalence of intestinal parasitic infections and associated risk factors in pregnant women: a systematic review and meta-analysis. Trans R Soc Trop Med Hyg 2021; 115:457-470. [PMID: 33007067 DOI: 10.1093/trstmh/traa101] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/04/2020] [Accepted: 09/10/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Intestinal parasitic infections (IPIs) during pregnancy, if left untreated, can cause adverse effects for the mothers, foetuses and newborns. However, limited information is available about the global status of IPIs in pregnant women. Here we undertook a meta-analysis to estimate the global prevalence of IPIs and associated risk factors in pregnant women. METHODS We searched the PubMed, Science Direct, Scopus, Web of Science and Google Scholar databases for relevant studies that were published between 1 January 1987 and 30 December 2019. A random effects meta-analysis model was used to estimate the pooled prevalence, odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS A total of 114 studies comprising 98 342 pregnant women across 35 countries were included in the systematic review and meta-analysis. Among IPIs identified from pregnant women, three helminth infections (hookworm 19% [95% CI 15 to 23], Ascaris lumbricoides 17% [95% CI 13 to 21] and Trichuris trichiura 11% [95% CI 7 to 16]) and three protozoan infections (Blastocystis sp. 21% [95% CI 4 to 46], Entamoeba histolytica/dispar 9% [95% CI 3 to 19] and Giardia sp. 8% [95% CI 4 to 13]) were identified as the most prevalent intestinal parasites. Moreover, we found that there was a significant association between IPIs with increased risk of anaemia in pregnant women (OR 2.65 [95% CI 2.08 to 3.37]). The prevalence of IPIs was slightly higher in geophagic pregnant women compared with controls, but this was not significant (OR 1.22 [95% CI 0.87 to 1.71]). According to species, the pooled OR of A. lumbricoides infection had a significantly higher risk in geophagic pregnant women compared with controls (OR 2.66 [95% CI 1.37 to 5.16]). There was a positive relationship between the high prevalence of IPIs in pregnant women living in rural areas compared with urban residents (OR 3.36 [95% CI 1.57 to 7.19]). CONCLUSIONS The current review revealed a relatively high prevalence of IPIs in pregnant women, especially in some low- and middle-income countries. These results suggest a need for improved prevention and control efforts to reduce the health risks to pregnant women.
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Affiliation(s)
- Ali Taghipour
- Department of Parasitology, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box 14115-111, Tehran, Iran
| | - Sahar Ghodsian
- Department of Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdi Jabbari
- Department of Microbiology, Faculty of Basic Science, Tabriz Branch, Islamic Azad University, Tabriz, Iran
| | - Meysam Olfatifar
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amir Abdoli
- Department of Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran.,Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Fatemeh Ghaffarifar
- Department of Parasitology, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box 14115-111, Tehran, Iran
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17
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Foodborne Parasitic Diseases in the Neotropics - A Review. Helminthologia 2021; 58:119-133. [PMID: 34248373 PMCID: PMC8256457 DOI: 10.2478/helm-2021-0022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 02/08/2021] [Indexed: 12/20/2022] Open
Abstract
Within the Universal Declaration of Human Rights, it is stated that everyone has the right to an adequate standard of living, which ensures, as well as their family, health and well-being, and food, thereby ensuring adequate nutrition. One of the major threats to overcome this is to ensure food security, which becomes particularly challenging in developing countries due to the high incidence of parasitic diseases. The World Health Organization (WHO), considers it one of the main causes of morbidity, closely linked to poverty and related to inadequate personal hygiene, consumption of raw food, lack of sanitary services, limited access to drinking water and fecal contamination in the environment. It is estimated that more than a fifth of the world’s population is infected by one or several intestinal parasites, and that in many countries of Central and South America the average percentage of infected people is 45%, being Taenia solium, Echinococcus granulosus, Toxoplasma gondii, Cryptosporidium spp, Entamoeba histolytica, Trichinella spiralis, Ascaris spp, Trypanosoma cruzi and Fasciola hepatica some of the most important ones in the neotropics. One of the main reasons why these diseases are diffi cult to control is t he ignorance of their lifecycles, as well as symptoms and current epidemiology of the disease, which contributes to a late or erroneous diagnosis. The present work aims to discuss and make public the current knowledge as well as the general characteristics of these diseases to the general audience.
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18
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Xin Q, Yuan M, Lv W, Li H, Song X, Lu J, Jing T. Molecular characterization and serodiagnostic potential of Echinococcus granulosus hexokinase. Parasit Vectors 2021; 14:105. [PMID: 33557934 PMCID: PMC7869421 DOI: 10.1186/s13071-021-04606-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 01/23/2021] [Indexed: 11/12/2022] Open
Abstract
Background Cystic echinococcosis (CE), caused by the larval stage of Echinococcus granulosus (sensu stricto), is a life-threatening but neglected zoonosis. Glycolytic enzymes are crucial molecules for the survival and development of E. granulosus. The aim of this study was to investigate the molecular characterization, immunogenicity, tissue distribution and serodiagnostic potential of E. granulosus hexokinase (EgHK), the first key enzyme in the glycolytic pathway. Methods EgHK was cloned and expressed in Escherichia coli. Specific serum antibodies were evaluated in mice immunized with recombinant EgHK (rEgHK). The location of EgHK in the larval stage of E. granulosus was determined using fluorescence immunohistochemistry, and the potential of rEgHK as a diagnostic antigen was investigated in patients with CE using indirect enzyme-linked immunosorbent assay (ELISA). Results Recombinant EgHK could be identified in the sera of patients with CE and in mouse anti-rEgHK sera. High titers of specific immunoglobulin G were induced in mice after immunization with rEgHK. EgHK was mainly located in the tegument, suckers and hooklets of protoscoleces and in the germinal layer and laminated layer of the cyst wall. The sensitivity and specificity of the rEgHK-ELISA reached 91.3% (42/46) and 87.8% (43/49), respectively. Conclusions We have characterized the sequence, structure and location of EgHK and investigated the immunoreactivity, immunogenicity and serodiagnostic potential of rEgHK. Our results suggest that EgHK may be a promising candidate for the development of vaccines against E. granulosus and an effective antigen for the diagnosis of human CE.![]()
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Affiliation(s)
- Qi Xin
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China
| | - Miaomiao Yuan
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China.,The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, 518000, Guangdong, People's Republic of China
| | - Wei Lv
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China
| | - Huanping Li
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China
| | - Xiaoxia Song
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China
| | - Jun Lu
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China
| | - Tao Jing
- Institute of Pathogenic Biology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, People's Republic of China.
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19
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Bizhani N, Hashemi Hafshejani S, Mohammadi N, Rezaei M, Rokni MB. Lymphatic filariasis in Asia: a systematic review and meta-analysis. Parasitol Res 2021; 120:411-422. [PMID: 33415391 PMCID: PMC7790732 DOI: 10.1007/s00436-020-06991-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 11/25/2020] [Indexed: 12/02/2022]
Abstract
Lymphatic filariasis (LF) is an important neglected parasitic disease according to the World Health Organization. In this study, we aimed to determine the prevalence of human LF in Asia using a systematic review and meta-analysis approach. Records from 1990 to 2018 in reputable databases including PubMed, Science Direct, Embase, and Cochrane Library were searched using a panel of related keywords. All 48 countries of Asia were searched one by one in combination with the keywords. In all, 41,742 cases identified in this study were included in the analysis. According to our findings, the pooled prevalence of LF in Asia was estimated at 3% (95% CI: [1.7, 5.2]). There was no major trend in the cumulative prevalence of LF over time. Some countries in Asia including China, Japan, Vietnam, and South Korea succeeded in eliminating LF as a public health problem, but others still need to monitor the disease. Based on the initiative of the WHO starting in 2000, some countries in Asia succeeded in eliminating LF as a public health problem. Other countries have taken steps to eliminate the disease with variable degrees of success. These efforts might be affected by issues such as climate change.
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Affiliation(s)
- Negar Bizhani
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeideh Hashemi Hafshejani
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Mohammadi
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Rezaei
- Department of Forestry and Landscape Architecture, Konkuk University, Seoul, Republic of Korea
| | - Mohammad Bagher Rokni
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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Song L, Lv Z, Xie Q. Foodborne parasitic diseases in China: A scoping review on current situation, epidemiological trends, prevention and control. ASIAN PAC J TROP MED 2021. [DOI: 10.4103/1995-7645.326252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Gozalbo M, Guillen M, Taroncher-Ferrer S, Cifre S, Carmena D, Soriano JM, Trelis M. Assessment of the Nutritional Status, Diet and Intestinal Parasites in Hosted Saharawi Children. CHILDREN (BASEL, SWITZERLAND) 2020; 7:E264. [PMID: 33260311 PMCID: PMC7760248 DOI: 10.3390/children7120264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/20/2020] [Accepted: 11/27/2020] [Indexed: 01/15/2023]
Abstract
Since the early 1990s, Spanish humanitarian associations have welcomed Saharawi children from the refugee camps in Tindouf (Argelia). These children are the most affected by the lack of food, water, hygienic measures and health care. The main objective of this study was to analyze the anthropometric, nutritional and parasitological data of 38 Saharawi boys and girls (from 10 to 13 years old) under a holiday host program in the city of Valencia. Our results confirm that malnutrition and multiparasitism are highly frequent, so it is understood that living conditions in refugee camps continue to be precarious with a lack of proper hygiene and nutrition. Furthermore, biochemical alterations, lactose malabsorption and the risk of celiac disease, also detected in our study as a secondary objective, will complicate nutritional management and restoration of health. For this reason, sustainable feeding alternatives and interventions from a hygienic and nutritional point of view are proposed, emphasizing in an improvement in the education of parents and children.
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Affiliation(s)
- Mónica Gozalbo
- Area of Nutrition and Bromatology, Department of Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine, University of Valencia, 46100 Burjassot, Spain
| | - Marisa Guillen
- Area of Preventive Medicine and Public Health, Department of Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine, University of Valencia, 46010 Valencia, Spain;
| | - Silvia Taroncher-Ferrer
- Clínica Universitària de Nutrició, Activitat física i Fisoteràpia (CUNAFF), Lluís Alcanyís Foundation-University of Valencia, 46010 Valencia, Spain;
| | - Susana Cifre
- Parasites and Health Research Group, Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, 46100 Burjassot, Spain; (S.C.); (M.T.)
| | - David Carmena
- Parasitology Reference and Research Laboratory, National Centre for Microbiology, Carlos III Health Institute, 28222 Majadahonda, Madrid, Spain;
| | - José M Soriano
- Observatory of Nutrition and Food Safety for Developing Countries, Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain;
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46026 Valencia, Spain
| | - María Trelis
- Parasites and Health Research Group, Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, 46100 Burjassot, Spain; (S.C.); (M.T.)
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46026 Valencia, Spain
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Syahrul F, Wahyuni CU, Notobroto HB, Wasito EB, Adi AC, Dwirahmadi F. Transmission Media of Foodborne Diseases as an Index Prediction of Diarrheagenic Escherichia coli: Study at Elementary School, Surabaya, Indonesia. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E8227. [PMID: 33171702 PMCID: PMC7664320 DOI: 10.3390/ijerph17218227] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 10/30/2020] [Accepted: 11/03/2020] [Indexed: 12/21/2022]
Abstract
Foodborne diseases (FBDs) have a large disease burden among children. The major type of FBD in children is diarrhea, caused mainly by contaminated food. One of the diarrhea pathogens is Diarrheagenic Escherichia coli (DEC). The aim of this study was to establish a model of microbial prediction (DEC) in stool, caused by the transmission of FBDs in elementary schoolchildren. An observational analytic study was conducted, with a nested case-control study design. In Stage I, the study population was children in a selected elementary school at Surabaya. The sample size for Stage I was 218 children. In Stage II, the case sample was all children with a positive test for DEC (15 children), and the control sample was all children who had tested negative for DEC (60 children). The result of the laboratory tests showed that the proportion of DEC in children was 6.88% (15 of 218 children) and the proportion of Escherichia coli O157:H7 in children was only 0.46%. The most significant mode of transmission included in the model was the snacking frequency at school and the risk classification of food that was often purchased at school. The formulation of the predicting model of DEC in stool can be used as an early warning against the incidence of FBDs in elementary schoolchildren.
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Affiliation(s)
- Fariani Syahrul
- Department of Epidemiology, Faculty of Public Health, Universitas Airlangga, Surabaya 60115, Indonesia;
| | - Chatarina U. Wahyuni
- Department of Epidemiology, Faculty of Public Health, Universitas Airlangga, Surabaya 60115, Indonesia;
| | - Hari B. Notobroto
- Department of Biostatistic, Faculty of Public Health Universitas Airlangga, Surabaya 60115, Indonesia;
| | - Eddy B. Wasito
- Department of Microbiology, Faculty of Medicine Universitas Airlangga, Surabaya 60115, Indonesia;
| | - Annis C. Adi
- Department of Nutrition, Faculty of Public Health Universitas Airlangga, Surabaya 60115, Indonesia;
| | - Febi Dwirahmadi
- Center for Environment and Population Health, School of Medicine, Griffith University, Queensland 4215, Australia;
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Klein S, Stern D, Seeber F. Expression of in vivo biotinylated recombinant antigens SAG1 and SAG2A from Toxoplasma gondii for improved seroepidemiological bead-based multiplex assays. BMC Biotechnol 2020; 20:53. [PMID: 33023547 PMCID: PMC7542104 DOI: 10.1186/s12896-020-00646-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/15/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Few bead-based multiplex assays have been described that detect antibodies against the protozoan parasite Toxoplasma gondii in large-scale seroepidemiological surveys. Moreover, each multiplex assay has specific variations or limitations, such as the use of truncated or fusion proteins as antigens, potentially masking important epitopes. Consequently, such an assay must be developed by interested groups as none is commercially available. RESULTS We report the bacterial expression and use of N-terminal fusion-free, soluble, in vivo biotinylated recombinant surface antigens SAG1 and SAG2A for the detection of anti-T. gondii IgG antibodies. The expression system relies on three compatible plasmids. An expression construct produces a fusion of maltose-binding protein with SAG1 (or SAG2A), separated by a TEV protease cleavage site, followed by a peptide sequence recognized by E. coli biotin ligase BirA (AviTag), and a terminal six histidine tag for affinity purification. TEV protease and BirA are encoded on a second plasmid, and their expression leads to proteolytic cleavage of the fusion protein and a single biotinylated lysine within the AviTag by BirA. Correct folding of the parasite proteins is dependent on proper disulfide bonding, which is facilitated by a sulfhydryl oxidase and a protein disulfide isomerase, encoded on the third plasmid. The C-terminal biotinylation allowed the oriented, reproducible coupling of the purified surface antigens to magnetic Luminex beads, requiring only minute amounts of protein per determination. We showed that an N-terminal fusion partner such as maltose-binding protein negatively influenced antibody binding, confirming that access to SAG1's N-terminal epitopes is important for antibody recognition. We validated our bead-based multiplex assay with human sera previously tested with commercial diagnostic assays and found concordance of 98-100% regarding both, sensitivity and specificity, even when only biotinylated SAG1 was used as antigen. CONCLUSIONS Our recombinant in vivo-biotinylated T. gondii antigens offer distinct advantages compared to previously described proteins used in multiplex serological assays for T. gondii. They offer a cheap, specific and sensitive alternative to either parasite lysates or eukaryotic-cell expressed SAG1/SAG2A for BBMA and other formats. The described general expression strategy can also be used for other antigens where oriented immobilization is key for sensitive recognition by antibodies and ligands.
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Affiliation(s)
- Sandra Klein
- FG 16 - Mycotic and Parasitic Agents and Mycobacteria, Robert Koch Institute, 13353, Berlin, Germany
| | - Daniel Stern
- ZBS 3 - Biological Toxins, Robert Koch Institute, 13353, Berlin, Germany
| | - Frank Seeber
- FG 16 - Mycotic and Parasitic Agents and Mycobacteria, Robert Koch Institute, 13353, Berlin, Germany.
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24
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The Seroprevalence of Toxoplasma gondii in Wild Boars from Three Voivodeships in Poland, MAT Analyses. Acta Parasitol 2020; 65:490-495. [PMID: 32124204 PMCID: PMC7272386 DOI: 10.2478/s11686-020-00185-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/14/2020] [Indexed: 11/25/2022]
Abstract
Purpose The European wild boar (Sus scrofa) is a popular game animal species. Its meat, however, can represent a reservoir of dangerous foodborne diseases and can play an important role in the transmission of many pathogens, including Toxoplasma gondii, in humans and animals worldwide. The aim of the present study was to determine the presence of antibodies to T. gondii in the serum of hunted wild boars in Poland. Methods Using the commercial direct agglutination test, 398 serum samples collected during the hunting season 2009/2010 were tested for the presence of T. gondii antibodies, and the titre of 40 was considered indicative of T. gondii infection in analysed samples. Results It was found that nationwide, 37.7% were seropositive to T. gondii, although seroprevalence varied from 11.6 to 50% depending on the Voivodeship. Significant differences were observed between the Great Poland and Lubusz Voivodeships and between Great Poland and Warmian-Masurian. Conclusion Serological test indicated widespread exposure to T. gondii by wild boar; therefore, consumption of raw or undercooked game meat of infected animals can carry a significant risk of T. gondii infection.
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25
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Efunshile MA, Onwakpu KO, Robertson LJ, Jokelainen P. Opinions and knowledge on globally important foodborne parasites among healthcare professionals at a tertiary teaching hospital in Nigeria. Food Waterborne Parasitol 2020; 18:e00075. [PMID: 32154397 PMCID: PMC7058820 DOI: 10.1016/j.fawpar.2020.e00075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/15/2020] [Accepted: 01/20/2020] [Indexed: 12/12/2022] Open
Abstract
Foodborne diseases are important everywhere in the world, but the level of attention they receive varies by region. We surveyed the current opinions and knowledge regarding the globally most important foodborne parasites (FBP) among healthcare professionals in Abakaliki, Ebonyi State, Nigeria, by conducting a questionnaire survey among healthcare professionals in a tertiary hospital. We focused on the FBP ranked as the top five globally: Taenia solium, Echinococcus granulosus, Echinococcus multilocularis, Toxoplasma gondii, and Cryptosporidium spp., and gathered local expert opinions regarding their importance in Nigeria. Moreover, we surveyed the extent of healthcare community knowledge on transmission, manifestations and pathologies, and prevention of infections with these five FBP. Among the 205 healthcare professionals completing the survey, T. solium was selected as important in Nigeria by 143 (70%), E. granulosus by 91 (44%), E. multilocularis by 62 (30%), T. gondii by 132 (64%), and Cryptosporidium spp. by 123 (60%). Only 44 (21%) of the participants selected at least 15 of the 25 answers to knowledge questions that we considered as correct to select. The proportion selecting at least 15 of the correct answers was not statistically significantly associated with gender nor with experience level. Our results suggest that further education about FBP should target healthcare professionals at all levels.
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Affiliation(s)
- Michael Akinwale Efunshile
- Department of Medical Microbiology, Ebonyi State University, Abakaliki, Nigeria
- Department of Medical Microbiology, Alex Ekweme Federal University Teaching Hospital, Abakaliki, Nigeria
| | | | - Lucy J. Robertson
- Norwegian University of Life Sciences, Department of Food Safety and Infection Biology, Section for Microbiology, Immunology, and Parasitology, Parasitology Lab, Adamstuen Campus, Ullevålsveien 72, 0454 Oslo, Norway
| | - Pikka Jokelainen
- Laboratory of Parasitology, Department of Bacteria, Parasites & Fungi, Infectious Disease Preparedness, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen S, Denmark
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26
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Trelis M, Taroncher-Ferrer S, Gozalbo M, Ortiz V, Soriano JM, Osuna A, Merino-Torres JF. Giardia intestinalis and Fructose Malabsorption: A Frequent Association. Nutrients 2019; 11:E2973. [PMID: 31817420 PMCID: PMC6950212 DOI: 10.3390/nu11122973] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 12/22/2022] Open
Abstract
Nowadays, scientific studies are emerging on the possible etiological role of intestinal parasites in functional digestive disorders. Our study was carried out with healthy individuals (control group; n = 82) and symptomatic patients with lactose or fructose malabsorption, including positive (malabsorbers; n = 213) and negative (absorbers; n = 56) breath test, being analyzed for the presence of intestinal parasites. A high parasitic prevalence was observed in malabsorbers (41.8%), exclusively due to single-cell eukaryotes but not helminths. Giardia intestinalis was the predominant parasite in cases of abnormal absorption (26.5%), significantly associated with fructose malabsorption and doubling the probability of developing this pathology. Within controls, Blastocystis sp. (13.4%) was almost the only parasite, being the second among patients (12.6%), and Cryptosporidium parvum, the last species of clinical relevance, was detected exclusively in two malabsorbers (0.9%). The consumption of ecological food and professions with direct contact with humans arose as risk factors of parasitism. A diagnosis of carbohydrate malabsorption in adulthood is the starting point, making the search for the primary cause necessary. Accurate parasitological diagnosis should be considered another tool in the clinical routine for patients with recurrent symptoms, since their condition may be reversible with adequate therapeutic intervention.
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Affiliation(s)
- María Trelis
- Area of Parasitology, Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, 46010 Valencia, Spain;
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46026 Valencia, Spain; (J.M.S.); (J.F.M.-T.)
| | - Silvia Taroncher-Ferrer
- Area of Parasitology, Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, 46010 Valencia, Spain;
- University Clinic of Nutrition, Physical Activity and Physiotherapy (CUNAFF), Lluís Alcanyís Foundation-University of Valencia, 46020 Valencia, Spain
| | - Mónica Gozalbo
- Area of Nutrition and Bromatology, University of Valencia, 46010 Valencia, Spain;
| | - Vicente Ortiz
- Department of Gastroenterology, University and Polytechnic Hospital La Fe, 46026 Valencia, Spain;
| | - José M. Soriano
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46026 Valencia, Spain; (J.M.S.); (J.F.M.-T.)
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Spain
| | - Antonio Osuna
- Biochemistry and Molecular Parasitology Group, Department of Parasitology, Institute of Biotechnology, University of Granada, 18003 Granada, Spain;
| | - Juan F. Merino-Torres
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46026 Valencia, Spain; (J.M.S.); (J.F.M.-T.)
- Department of Endocrinology and Nutrition, University and Polytechnic Hospital La Fe, 46026 Valencia, Spain
- Department of Medicine, University of Valencia, 46010 Valencia, Spain
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Solaymani-Mohammadi S, Eckmann L, Singer SM. Interleukin (IL)-21 in Inflammation and Immunity During Parasitic Diseases. Front Cell Infect Microbiol 2019; 9:401. [PMID: 31867283 PMCID: PMC6904299 DOI: 10.3389/fcimb.2019.00401] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/11/2019] [Indexed: 12/30/2022] Open
Abstract
Parasitic diseases cause significant morbidity and mortality in the developing and underdeveloped countries. No efficacious vaccines are available against most parasitic diseases and there is a critical need for developing novel vaccine strategies for care. IL-21 is a pleiotropic cytokine whose functions in protection and immunopathology during parasitic diseases have been explored in limited ways. IL-21 and its cognate receptor, IL-21R, are highly expressed in parasitized organs of infected humans as well in murine models of the human parasitic diseases. Prior studies have indicated the ability of the IL-21/IL-21R signaling axis to regulate the effector functions (e.g., cytokine production) of T cell subsets by enhancing the expression of T-bet and STAT4 in human T cells, resulting in an augmented production of IFN-γ. Mice deficient for either IL-21 (Il21−/−) or IL-21R (Il21r−/−) showed significantly reduced inflammatory responses following parasitic infections as compared with their WT counterparts. Targeting the IL-21/IL-21R signaling axis may provide a novel approach for the development of new therapeutic agents for the prevention of parasite-induced immunopathology and tissue destruction.
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Affiliation(s)
- Shahram Solaymani-Mohammadi
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA, United States
| | - Lars Eckmann
- Department of Medicine, University of California, San Diego, La Jolla, CA, United States
| | - Steven M Singer
- Department of Biology, Georgetown University, Washington, DC, United States
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Leroy J, Houzé S, Dardé ML, Yéra H, Rossi B, Delhaes L, Gabriel F, Loubet P, Deleplancque AS, Senneville E, Ajana F, Sendid B, Malvy D. Severe toxoplasmosis imported from tropical Africa in immunocompetent patients: A case series. Travel Med Infect Dis 2019; 35:101509. [PMID: 31712179 DOI: 10.1016/j.tmaid.2019.101509] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/08/2019] [Accepted: 10/31/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Toxoplasmosis is a zoonosis caused by the protozoan Toxoplasma gondii. In immunocompetent patients the infection is usually benign. However, cases of severe and even lethal primo-infections are regularly reported in South America. In contrast, data from tropical Africa are fragmentary. METHODS Data for French cases of severe toxoplasmosis acquired between 2013 and 2018, in tropical Africa and among immunocompetent patients were collected retrospectively in 2018. RESULTS Four male patients with a mean age of 34-years were identified. All infections originated in West or Central Africa. The clinical presentations were heterogeneous: two patients had severe disseminated toxoplasmosis, of which one presented with chorioretinitis associated with myositis and the other with febrile pneumopathy; one patient presented with post-infectious acute cerebellar ataxia and the final case had general symptoms and skin manifestations. The diagnosis of acute toxoplasmosis was confirmed by serology in four patients. Molecular diagnosis confirmed T. gondii infection in three patients with Africa 1 as the dominant genotype. The infection was cured with anti-infective treatment in all four patients. Ocular sequelae were reported in the two patients with chorioretinitis. CONCLUSIONS Imported cases of severe toxoplasmosis in immunocompetent patients are rare in France. However, this aetiology should be evoked rapidly in a patient with a severe infectious syndrome who has recently visited or originated from tropical Africa.
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Affiliation(s)
- Jordan Leroy
- CHU Lille, Parasitology Mycology Department, Univ. Lille, Inserm, U995 - LIRIC - Lille Inflammation Research International Center, F-59000, Lille, France
| | - Sandrine Houzé
- Laboratoire de Parasitologie-Mycologie, Assistance Publique-Hôpitaux de Paris, Hôpital Bichat Claude Bernard, Paris, France
| | - Marie-Laure Dardé
- Inserm UMR_S 1094, Neuroépidémiologie Tropicale, Laboratoire de Parasitologie-Mycologie, Faculté de Médecine, Université de Limoges, Limoges, 87025, France; Centre National de Référence Toxoplasmose/Toxoplasma Biological Resource Center, CHU Limoges, 87042, Limoges, France
| | - Hélène Yéra
- Department of Parasitology-Mycology, Faculty of Medicine, Université Paris Descartes, Hôpitaux Universitaire Paris Centre, Assistance Publique Hôpitaux de Paris, CHU Cochin, Paris, France
| | - Benjamin Rossi
- Department of Internal Medicine, Beaujon Hospital, Hôpitaux Universitaires Paris Nord Val de Seine, APHP, Clichy, France
| | - Laurence Delhaes
- Department of Parasitology and Mycology, Bordeaux Hospital University Center, Bordeaux, France
| | - Frédéric Gabriel
- Department of Parasitology and Mycology, Bordeaux Hospital University Center, Bordeaux, France
| | - Paul Loubet
- IAME, UMR 1137, Inserm, Paris Diderot University, Sorbonne Paris Cité, AP-HP, Bichat-Claude Bernard Hospital, Infectious Diseases Department, Paris, France
| | - Anne-Sophie Deleplancque
- CHU Lille, Parasitology Mycology Department, Univ. Lille, Inserm, U995 - LIRIC - Lille Inflammation Research International Center, F-59000, Lille, France
| | - Eric Senneville
- Infectious Diseases Department, Gustave Dron Hospital, Tourcoing, France
| | - Faïza Ajana
- Infectious Diseases Department, Gustave Dron Hospital, Tourcoing, France
| | - Boualem Sendid
- CHU Lille, Parasitology Mycology Department, Univ. Lille, Inserm, U995 - LIRIC - Lille Inflammation Research International Center, F-59000, Lille, France.
| | - Denis Malvy
- Department for Infectious and Tropical Diseases, University Hospital Centre of Bordeaux, Inserm 1219, University of Bordeaux, Bordeaux, France
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Mohammad Rahimi H, Pourhosseingholi MA, Yadegar A, Mirjalali H, Zali MR. High-resolution melt curve analysis: A real-time based multipurpose approach for diagnosis and epidemiological investigations of parasitic infections. Comp Immunol Microbiol Infect Dis 2019; 67:101364. [PMID: 31590033 DOI: 10.1016/j.cimid.2019.101364] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND Real-time PCR coupled with high resolution melting curve analysis is a practical technique that could be employed in multipurpose studies. During the recent decade, this technique has been practiced for different targets, worldwide. METHODS In the current study three major database centers consisted of PubMed, Scopus and Web of Science were searched until Aug 2019 for applications of HRM real-time PCR in parasitology studies using terms: "Parasite" AND "HRM real-time PCR" OR "High Resolution Melting curve analysis" OR "Real-time PCR", "Protozoan parasites" AND "HRM real-time PCR" OR "High Resolution Melting curve analysis" OR "Real-time PCR", "Helminth" AND "HRM real-time PCR" OR "High Resolution Melting curve analysis" OR "Real-time PCR". RESULTS Totally, 83 papers met our criteria and were included in our study. This method was more frequently used for protozoan parasites (52/83; 62.65%), while lower (31/83; 37.35%) studies were incorporated on helminths parasites. Furthermore, Plasmodium spp., and Leishmania spp., were the most prevalent protozoan parasites, and Taenia spp., and filers were the most frequent helminths that were studied by HRM real-time PCR. CONCLUSION HRM real-time PCR is a sensitive, flexible and cost-effective method that could be used for multipurpose studies.
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Affiliation(s)
- Hanieh Mohammad Rahimi
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Pourhosseingholi
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Yadegar
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Mirjalali
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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30
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Hrabar J, Trumbić Ž, Bočina I, Bušelić I, Vrbatović A, Mladineo I. Interplay between proinflammatory cytokines, miRNA, and tissue lesions in Anisakis-infected Sprague-Dawley rats. PLoS Negl Trop Dis 2019; 13:e0007397. [PMID: 31091271 PMCID: PMC6538193 DOI: 10.1371/journal.pntd.0007397] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 05/28/2019] [Accepted: 04/16/2019] [Indexed: 12/29/2022] Open
Abstract
Background Anisakiasis is an emerging public health problem, caused by Anisakis spp. nematode larvae. Anisakiasis presents as variable and unspecific gastrointestinal and/or allergic clinical symptoms, which accounts for the high rate of misdiagnosed cases. Methodology/Principal findings The aim of this study was to characterize the early cellular (6–72 h p.i.) and molecular (6 h p.i.) immune response and general underlying regulatory mechanism in Anisakis infected rats. Each Sprague-Dawley rat was infected with 10 Anisakis spp. larvae by gastric intubation. Tissues with visible lesions were processed for: i) classic histopathology (HE), immunofluorescence (CD3, iNOS, S100A8/A9), and transmission electron microscopy (TEM); ii) target genes (Il1b, Il6, Il18, Ccl3, Icam1, Mmp9) and microRNA (Rat Immunopathology MIRN-104ZF plate, Quiagen) expression analysis; and iii) global DNA methylation. Histopathology revealed that Anisakis larval migration caused moderate to extensive hemorrhages in submucosal and epimysial/perimysial connective tissue. In stomach and muscle, moderate to abundant mixed inflammatory infiltrate was present, dominated by neutrophils and macrophages, while only mild infiltration was seen in intestine. Lesions were characterized by the presence of CD3+, iNOS+, and S100A8/A9+ cells. The greatest number of iNOS+ and S100A8/A9+ cells was seen in muscle. Il6, Il1b, and Ccl3 showed particularly strong expression in stomach and visceral adipose tissues, but the order of expression differed between tissues. In total, three miRNAs were differentially expressed, two in stomach (miRNA-451 and miRNA-223) and two in intestine (miRNA-451 and miRNA-672). No changes in global DNA methylation were observed in infected tissues relative to controls. Conclusions/Significance Anisakis infection induces strong immune responses in infected rats with marked induction of specific proinflammatory cytokines and miRNA expression. Deciphering the functional role of these cytokines and miRNAs will help in understanding the anisakiasis pathology and controversies surrounding Anisakis infection in humans. Anisakiasis is a zoonotic disease (infection transmitted between animals and humans) contracted by consumption of raw or undercooked seafood contaminated with Anisakis spp. nematode larvae. Anisakiasis usually presents with variable and unspecific gastrointestinal and/or allergic symptoms, which accounts for the high rate of misdiagnosed cases. Due to changes in dietary habits, such as eating raw or undercooked seafood, anisakiasis is considered an emerging public health problem. Despite the increase in number of reported cases worldwide, mechanisms of immune response to this unspecific human pathogen are poorly known. We have shown that in experimentally infected rats, Anisakis larvae cause severe hemorrhages and necrotic changes of affected tissues in the early phase of infections. Neutrophils and macrophages were abundantly present in tissue lesions, while eosinophils, hallmark of helminth infections, were scarcely present. We have also demonstrated particularly strong expression of several inflammatory genes. Moreover, we give for the first-time insight into putative regulatory mechanism mediated via a distinct class of RNA molecules. Our study may provide new opportunities for better understanding of cellular and molecular response to Anisakis spp., aiming at development of more specific therapeutics and alleviation of pathologies associated with Anisakis spp. infection.
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Affiliation(s)
- Jerko Hrabar
- Laboratory of Aquaculture, Institute of Oceanography and Fisheries, Split, Croatia
- * E-mail:
| | - Željka Trumbić
- Department of Marine Studies, University of Split, Split, Croatia
| | - Ivana Bočina
- Faculty of Science, University of Split, Split, Croatia
| | - Ivana Bušelić
- Laboratory of Aquaculture, Institute of Oceanography and Fisheries, Split, Croatia
| | - Anamarija Vrbatović
- Laboratory of Aquaculture, Institute of Oceanography and Fisheries, Split, Croatia
| | - Ivona Mladineo
- Laboratory of Aquaculture, Institute of Oceanography and Fisheries, Split, Croatia
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Khan IA, Hwang S, Moretto M. Toxoplasma gondii: CD8 T Cells Cry for CD4 Help. Front Cell Infect Microbiol 2019; 9:136. [PMID: 31119107 PMCID: PMC6504686 DOI: 10.3389/fcimb.2019.00136] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/15/2019] [Indexed: 11/13/2022] Open
Abstract
Toxoplasma gondii, an apicomplexan parasite, is a pathogenic protozoan that can infect the central nervous system. In pregnant women, infection can result in congenital problems of the fetus, while in immunocompromised individual it can lead to severe neurological consequences. Although CD8 T cells play an important effector role in controlling the chronic infection, their maintenance is dependent on the critical help provided by CD4 T cells. In a recent study, we demonstrated that reactivation of the infection in chronically infected host is a consequence of CD8 T dysfunction caused by CD4 T cell exhaustion. Furthermore, treatment of chronically infected host with antigen-specific non-exhausted CD4 T cells can restore CD8 T cell functionality and prevent reactivation of the latent infection. The exhaustion status of CD4 T cells is mediated by the increased expression of the transcription factor BLIMP-1, and deletion of this molecule led to the restoration of CD4 T cell function, reversal of CD8 exhaustion and prevention of reactivation of the latent infection. In a recent study from our laboratory, we also observed an increased expression of miR146a levels by CD4 T cells from the chronically infected animals. Recent reports have demonstrated that microRNAs (especially miR146a) has a strong impact on the immune system of T. gondii infected host. Whether these molecules have any role in the BLIMP-1 up-regulation and dysfunctionality of these cells needs to be investigated.
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Affiliation(s)
- Imtiaz A. Khan
- Department Microbiology, Immunology and Tropical Medicine, The George Washington University, Washington, DC, United States
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Idris OA, Wintola OA, Afolayan AJ. Helminthiases; prevalence, transmission, host-parasite interactions, resistance to common synthetic drugs and treatment. Heliyon 2019; 5:e01161. [PMID: 30775568 PMCID: PMC6357211 DOI: 10.1016/j.heliyon.2019.e01161] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/17/2018] [Accepted: 01/21/2019] [Indexed: 01/08/2023] Open
Abstract
The morbidity caused by parasite worms on susceptible hosts is of great concern and studies were carried out to explain the mechanism of infection, prevalence, host-parasite interaction and resistance of the parasite to treatment. This review elucidates the prevalence of parasitic worm infections; which is on the increases with the increase in the world population, global warming, poor standard of living particularly in troubled regions and developing nations. The neglect of the disease coupled with the resistance of these parasites to the few available drugs becomes a huge challenge that influences global disease burden. Helminths infections pose a life threat and increase the disability-adjusted life year (DALYs) of the poor and vulnerable people. On the other hand, exploration of medicinal plants as an alternative source of treatment against drugs resistance helminths, attract insufficient attention. This review focused on providing a general overview of the prevalence of helminths, host-parasite interactions, the resistance of helminths and the medicinal plants used to treat helminthic infections.
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Affiliation(s)
- Oladayo Amed Idris
- Medicinal Plants and Economic Development (MPED) Research Centre, Department of Botany, University of Fort Hare, Alice, 5700, South Africa
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Effects of Water Quality and Post-Harvest Handling on Microbiological Contamination of Lettuce at Urban and Peri-Urban Locations of Ouagadougou, Burkina Faso. Foods 2018; 7:foods7120206. [PMID: 30558351 PMCID: PMC6306915 DOI: 10.3390/foods7120206] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/11/2018] [Accepted: 12/12/2018] [Indexed: 12/04/2022] Open
Abstract
Vegetable production in urban gardens of Ouagadougou contributes to food security, but water for irrigation is often of low quality. This is particularly acute if irrigation water is taken from wastewater polluted channels. This study aimed at (i) verifying to what degree irrigation water quality is correlated with contamination of lettuce with Escherichia coli, total coliforms, and Salmonella spp., and (ii) assessing effects of post-harvest handling on pathogen development during the trade chain. We tested pathogen removal efficiency on lettuce by applying post-harvest washing. Irrigation water of production areas in Ouagadougou (n = 10) showed a mean E. coli load of 2.1 × 105 CFU 100 mL−1. In 60% of the cases, irrigation water did not meet the standards of the World Health Organization (WHO) for safe irrigation water, and in 30% of the cases, irrigation water was contaminated with Salmonella spp. Loads of total coliforms on lettuce leaves ranged from 2.9 × 103 CFU g−1 to 1.3 × 106 CFU g−1, while E. coli averaged 1.1 × 102 CFU g−1. Results on post-harvest handling revealed that microbial loads increased along the trade chain. Overall, half of all lettuce samples (n = 60) were tested positively for Salmonella spp. The experiment showed that appropriate post-harvest handling could prevent the increase of total coliforms.
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Wu G, Yuan Q, Wang L, Zhao J, Chu Z, Zhuang M, Zhang Y, Wang K, Xiao P, Liu Y, Du Z. Epidemiology of foodborne disease outbreaks from 2011 to 2016 in Shandong Province, China. Medicine (Baltimore) 2018; 97:e13142. [PMID: 30407341 PMCID: PMC6250508 DOI: 10.1097/md.0000000000013142] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 10/12/2018] [Indexed: 12/17/2022] Open
Abstract
Foodborne disease is a major public health concern in both developed and developing countries. China has established a nationwide Foodborne Disease Outbreak Surveillance System (FDOSS) for collection and periodic reporting of data on the occurrence and causes of foodborne disease outbreaks in China. Each provincial Centers for Disease Control and Prevention (CDC) conducts the system working.We reviewed foodborne disease outbreaks that occurred during 2011 to 2016 in Shandong Province from the FDOSS. The Wilcoxon test was used to compare the median number of ill persons in outbreaks. All data analysis was performed using Epi Info 7.During 2011 to 2016, Shandong CDC received reports of 1043 foodborne disease outbreaks, resulting in 8078 illnesses, 2442 hospitalizations, and 17 deaths. There were a median of 69 outbreaks annually [interquartile range (IQR) 10-342], resulting in 335 to 3824 illnesses each year. The median outbreak size was 3 persons (IQR 2-7). Hotels (including cruise ships, hotpot restaurants, barbecue shops) were the most common setting. Among the 744 (71.3%) outbreaks with an implicated food or contaminated ingredient reported, 704 (94.6%) could be assigned to one of 17 predefined commodity categories. Of the 280 outbreaks with a known etiology, 117 (41.8%) were caused by poisonous plants and animals and their toxins, 39 (13.9) were caused by nitrite, and 27 (9.6%) were caused by vibrio parahaemolyticus. Of the 491 (47.1%) outbreaks with at least a contributing factor to cause outbreak, 168 (34.2%) were caused by improper processing, and 100 (20.4) were caused by inedible and misuse.Timely investigation, disposal and reporting of foodborne disease outbreaks provides information that might help FDOSS to make full use of efficiency and FDOSS should be continued and strengthened even more in Shandong Province, such as an increase in diagnostic laboratory capacities.
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Affiliation(s)
- Guangjian Wu
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
- School of Public Health, Jilin University, Changchun, Jilin Province
| | - Qun Yuan
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Liansen Wang
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Jinshan Zhao
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Zunhua Chu
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Maoqiang Zhuang
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Yingxiu Zhang
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Kebo Wang
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Peirui Xiao
- Shandong Center for Disease Control and Prevention
- Shandong Center for Food Safety Risk Assessment
- Academy of Preventive Medicine, Shandong University, Jinan, Shandong Province
| | - Ya Liu
- School of Public Health, Jilin University, Changchun, Jilin Province
| | - Zhongjun Du
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong Academy of Medical Sciences, Jinan, Shandong Province, People's Republic of China
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PD-L1, TIM-3, and CTLA-4 Blockade Fails To Promote Resistance to Secondary Infection with Virulent Strains of Toxoplasma gondii. Infect Immun 2018; 86:IAI.00459-18. [PMID: 29967089 DOI: 10.1128/iai.00459-18] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 06/19/2018] [Indexed: 01/05/2023] Open
Abstract
T cell exhaustion is a state of hyporesponsiveness that develops during many chronic infections and cancer. Neutralization of inhibitory receptors, or "checkpoint blockade," can reverse T cell exhaustion and lead to beneficial prognoses in experimental and clinical settings. Whether checkpoint blockade can resolve lethal acute infections is less understood but may be beneficial in vaccination protocols that fail to elicit sterilizing immunity. Since a fully protective vaccine for any human parasite has yet to be developed, we explored the efficacy of checkpoint inhibitors in a mouse model of Toxoplasma gondii reinfection. Mice chronically infected with an avirulent type III strain survive reinfection with the type I RH strain but not the MAS, GUY-DOS, and GT1 parasite strains. We report here that mouse susceptibility to secondary infection correlates with the initial parasite burden and that protection against the RH strain is dependent on CD8 but not CD4 T cells in this model. When given a lethal secondary infection, CD8 and CD4 T cells upregulate several coinhibitory receptors, including PD-1, TIM-3, 4-1bb, and CTLA-4. Moreover, the gamma interferon (IFN-γ) response of CD8 but not CD4 T cells is significantly reduced during secondary infection with virulent strains, suggesting that checkpoint blockade may reduce disease severity. However, single and combination therapies targeting TIM-3, CTLA-4, and/or PD-L1 failed to reverse susceptibility to secondary infection. These results suggest that additional host responses, which are refractory to checkpoint blockade, are likely required for immunity to this pathogen.
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A Food Poisoning Outbreak by Shigella boydii in Kerman-Iran. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2018. [DOI: 10.5812/archcid.82350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Condoleo R, Rinaldi L, Sette S, Mezher Z. Risk Assessment of Human Toxoplasmosis Associated with the Consumption of Pork Meat in Italy. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2018; 38:1202-1222. [PMID: 29098702 DOI: 10.1111/risa.12934] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 08/18/2017] [Accepted: 08/25/2017] [Indexed: 06/07/2023]
Abstract
Toxoplasmosis is a cosmopolitan disease and has a broad range of hosts, including humans and several wild and domestic animals. The human infection is mostly acquired through the consumption of contaminated food and pork meat has been recognized as one of the major sources of transmission. There are, however, certain fundamental differences between countries; therefore, the present study specifically aims to evaluate the exposure of the Italian population to Toxoplasma gondii through the ingestion of several types of pork meat products habitually consumed in Italy and to estimate the annual number of human infections within two subgroups of the population. A quantitative risk assessment model was built for this reason and was enriched with new elements in comparison to other similar risk assessments in order to enhance its accuracy. Sensitivity analysis and two alternative scenarios were implemented to identify the factors that have the highest impact on risk and to simulate different plausible conditions, respectively. The estimated overall average number of new infections per year among adults is 12,513 and 92 for pregnant women. The baseline model showed that almost all these infections are associated with the consumption of fresh meat cuts and preparations (mean risk of infection varied between 4.5 × 10-5 and 5.5 × 10-5 ) and only a small percentage is due to fermented sausages/salami. On the contrary, salt-cured meat products seem to pose minor risk but further investigations are needed to clarify still unclear aspects. Among all the considered variables, cooking temperature and bradyzoites' concentration in muscle impacted most the risk.
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Affiliation(s)
- Roberto Condoleo
- Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy
| | - Laura Rinaldi
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università degli Studi di Napoli "Federico II,", Napoli, Italy
| | - Stefania Sette
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria, Centro di Ricerca per gli Alimenti e la Nutrizione, Roma, Italy
| | - Ziad Mezher
- Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Roma, Italy
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39
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Delahoy MJ, Wodnik B, McAliley L, Penakalapati G, Swarthout J, Freeman MC, Levy K. Pathogens transmitted in animal feces in low- and middle-income countries. Int J Hyg Environ Health 2018; 221:661-676. [PMID: 29729998 PMCID: PMC6013280 DOI: 10.1016/j.ijheh.2018.03.005] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/20/2018] [Accepted: 03/14/2018] [Indexed: 02/04/2023]
Abstract
Animals found in close proximity to humans in low-and middle-income countries (LMICs) harbor many pathogens capable of infecting humans, transmissible via their feces. Contact with animal feces poses a currently unquantified-though likely substantial-risk to human health. In LMIC settings, human exposure to animal feces may explain some of the limited success of recent water, sanitation, and hygiene interventions that have focused on limiting exposure to human excreta, with less attention to containing animal feces. We conducted a review to identify pathogens that may substantially contribute to the global burden of disease in humans through their spread in animal feces in the domestic environment in LMICs. Of the 65 potentially pathogenic organisms considered, 15 were deemed relevant, based on burden of disease and potential for zoonotic transmission. Of these, five were considered of highest concern based on a substantial burden of disease for which transmission in animal feces is potentially important: Campylobacter, non-typhoidal Salmonella (NTS), Lassa virus, Cryptosporidium, and Toxoplasma gondii. Most of these have a wide range of animal hosts, except Lassa virus, which is spread through the feces of rats indigenous to sub-Saharan Africa. Combined, these five pathogens cause close to one million deaths annually. More than half of these deaths are attributed to invasive NTS. We do not estimate an overall burden of disease from improperly managed animal feces in LMICs, because it is unknown what proportion of illnesses caused by these pathogens can be attributed to contact with animal feces. Typical water quantity, water quality, and handwashing interventions promoted in public health and development address transmission routes for both human and animal feces; however, sanitation interventions typically focus on containing human waste, often neglecting the residual burden of disease from pathogens transmitted via animal feces. This review compiles evidence on which pathogens may contribute to the burden of disease through transmission in animal feces; these data will help prioritize intervention types and regions that could most benefit from interventions aimed at reducing human contact with animal feces.
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Affiliation(s)
- Miranda J Delahoy
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA
| | - Breanna Wodnik
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA
| | - Lydia McAliley
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA
| | - Gauthami Penakalapati
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA
| | - Jenna Swarthout
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA
| | - Matthew C Freeman
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA
| | - Karen Levy
- Department of Environmental Health, Emory University Rollins School of Public Health, 1518 Clifton Road NE, Atlanta, GA 30322, USA.
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Seroprevalence of Toxoplasma gondii in pregnant women and livestock in the mainland of China: a systematic review and hierarchical meta-analysis. Sci Rep 2018; 8:6218. [PMID: 29670127 PMCID: PMC5906581 DOI: 10.1038/s41598-018-24361-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 03/22/2018] [Indexed: 01/22/2023] Open
Abstract
Primary Toxoplasma gondii infection in pregnant women may result in abortion, stillbirth, or lifelong disabilities of the unborn child. One of the main transmission routes to humans is consumption of raw or undercooked meat containing T. gondii tissue cysts. We aim to determine and compare the regional distribution of T. gondii seroprevalence in pregnant women and meat-producing livestock in China through a systematic literature review. A total of 272 eligible publications were identified from Medline, Scopus, Embase and China National Knowledge Infrastructure. Apparent and true seroprevalence were analysed by region using a novel Bayesian hierarchical model that allowed incorporating sensitivity and specificity of the applied serological assays. The true seroprevalence of T. gondii in pregnant women was 5.0% or less in seven regions of China. The median of the regional true seroprevalences in pigs (24%) was significantly higher than in cattle (9.5%), but it was not significantly higher than in chickens (20%) and small ruminants (20%). This study represents the first use of a Bayesian hierarchical model to obtain regional true seroprevalence. These results, in combination with meat consumption data, can be used to better understand the contribution of meat-producing animals to human T. gondii infection in China.
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Berhe B, Bugssa G, Bayisa S, Alemu M. Foodborne intestinal protozoan infection and associated factors among patients with watery diarrhea in Northern Ethiopia; a cross-sectional study. JOURNAL OF HEALTH, POPULATION, AND NUTRITION 2018; 37:5. [PMID: 29499754 PMCID: PMC5834838 DOI: 10.1186/s41043-018-0137-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/24/2018] [Indexed: 05/14/2023]
Abstract
BACKGROUND Intestinal protozoa are parasites transmitted by consumption of contaminated water and food and mainly affect children and elder people and cause considerable health problems. They are the leading causes of outpatient morbidity due to diarrhea in the developing countries. So, assessing water and food source of diarrheal patients and identifying the main associated factors for transmission of protozoan parasitic infections help for effective control measures of protozoan infections. Hence, the current study was aimed at determining the prevalence of foodborne intestinal protozoa infections and associated factors among diarrheic patients in North Ethiopia. METHODS A health facility based cross-sectional study was conducted among 223 patients with watery diarrhea in four selected government health facilities in North Ethiopia from November 2016-June 2017. A structured questionnaire was used to collect data on socio-demography of study participants and factors associated with foodborne protozoa infections. The diarrheic stool samples were collected, transported, and processed using direct wet mount, formal-ether concentration and modified ZiehlNeelson staining methods. The data were analyzed using SPSS version 21 and descriptive statistics, bi-variate, and multivariate logistic regressions were computed. P-value < 0.05 at 95% confidence interval was considered statistically significant. RESULTS The overall prevalence of foodborne protozoa infection was 101 (45.3%). The predominant protozoa species identified was Entamoeba histolytica/dispar 55 (24.7%), followed by Giardia intestinalis 25 (11.2%) and Cryptosporidium species 5 (2.2%). The highest proportion of protozoa infection was observed among males (23.3%) and the age group 15-24 years (13.5%). Statistically significant associations were observed between foodborne protozoan infection and not using any type of recipe to decontaminate salads and fruits (AOR = 2.64, 95 CI: 1.34-5.19, P = 0.005) and using vinegar as a decontaminant (AOR = 2.83, 95 CI: 1.24-6.48, P = 0.014). Eating out (meals at a restaurant) on the other hand was found to be protective for foodborne protozoan infection (AOR = 0.43, 95 CI: 0.23-0.78, P = 0.006). CONCLUSION Our study revealed that foodborne protozoa infections are of public health significance in the study area. Vinegar, which is frequently used as a recipe for decontaminating salads and fruits, is inversely related to foodborne protozoa parasite infection .
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Affiliation(s)
- Birhane Berhe
- Department of Bio-Medical Laboratory Science, College of Health Science, Adigrat University, Adigrat, Ethiopia
| | - Gessessew Bugssa
- Department of Medical Parasitology and Entomology, Institute of Biomedical Sciences, College of Health Science, Mekelle University, Mekelle, Ethiopia
| | - Sena Bayisa
- Department of Medical Parasitology and Entomology, Institute of Biomedical Sciences, College of Health Science, Mekelle University, Mekelle, Ethiopia
| | - Megbaru Alemu
- Department of Medical Microbiology, Immunology and Parasitology, Bahir Dar University, Mekelle, Ethiopia
- Department of Microbiology, Immunology and Parasitology, Bahir Dar University, PO Box 79, Bahir Dar, Ethiopia
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Hemphill A, Leitão A, Ortega-Mora LM, Cooke BM. ApiCOWplexa 2017 - 4th International Meeting on Apicomplexan Parasites in Farm Animals. Int J Parasitol 2017; 47:697-699. [PMID: 28942797 DOI: 10.1016/j.ijpara.2017.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Andrew Hemphill
- Institute of Parasitology, Vetsuisse Faculty, University of Bern, Länggass-Strasse 122, CH-3012 Bern, Switzerland.
| | - Alexandre Leitão
- CIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.
| | - Luis-Miguel Ortega-Mora
- SALUVET, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
| | - Brian M Cooke
- Biomedicine Discovery Institute and Department of Microbiology, Monash University, Victoria 3800, Australia.
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Amarillas L, Rubí-Rangel L, Chaidez C, González-Robles A, Lightbourn-Rojas L, León-Félix J. Isolation and Characterization of phiLLS, a Novel Phage with Potential Biocontrol Agent against Multidrug-Resistant Escherichia coli. Front Microbiol 2017; 8:1355. [PMID: 28785246 PMCID: PMC5519627 DOI: 10.3389/fmicb.2017.01355] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/04/2017] [Indexed: 01/21/2023] Open
Abstract
Foodborne diseases are a serious and growing problem, and the incidence and prevalence of antimicrobial resistance among foodborne pathogens is reported to have increased. The emergence of antibiotic-resistant bacterial strains demands novel strategies to counteract this epidemic. In this regard, lytic bacteriophages have reemerged as an alternative for the control of pathogenic bacteria. However, the effective use of phages relies on appropriate biological and genomic characterization. In this study, we present the isolation and characterization of a novel bacteriophage named phiLLS, which has shown strong lytic activity against generic and multidrug-resistant Escherichia coli strains. Transmission electron microscopy of phiLLS morphology revealed that it belongs to the Siphoviridae family. Furthermore, this phage exhibited a relatively large burst size of 176 plaque-forming units per infected cell. Phage phiLLS significantly reduced the growth of E. coli under laboratory conditions. Analyses of restriction profiles showed the presence of submolar fragments, confirming that phiLLS is a pac-type phage. Phylogenetic analysis based on the amino acid sequence of large terminase subunits confirmed that this phage uses a headful packaging strategy to package their genome. Genomic sequencing and bioinformatic analysis showed that phiLLS is a novel bacteriophage that is most closely related to T5-like phages. In silico analysis indicated that the phiLLS genome consists of 107,263 bp (39.0 % GC content) encoding 160 putative ORFs, 16 tRNAs, several potential promoters and transcriptional terminators. Genome analysis suggests that the phage phiLLS is strictly lytic without carrying genes associated with virulence factors and/or potential immunoreactive allergen proteins. The bacteriophage isolated in this study has shown promising results in the biocontrol of bacterial growth under in vitro conditions, suggesting that it may prove useful as an alternative agent for the control of foodborne pathogens. However, further oral toxicity testing is needed to ensure the safety of phage use.
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Affiliation(s)
- Luis Amarillas
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
- Laboratorio de Genética, Instituto de Investigación Lightbourn, Cd. JiménezChihuahua, Mexico
| | - Lucia Rubí-Rangel
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
| | - Cristobal Chaidez
- Laboratorio Nacional para la Investigación en Inocuidad Alimentaria, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
| | - Arturo González-Robles
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico NacionalCiudad de México, Mexico
| | - Luis Lightbourn-Rojas
- Laboratorio de Genética, Instituto de Investigación Lightbourn, Cd. JiménezChihuahua, Mexico
| | - Josefina León-Félix
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
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Ultrastructural characters of the spermatozoon of the liver fluke Opisthorchis viverrini (Poirier, 1886) (Opisthorchiidae). Parasitol Res 2017; 116:2499-2506. [PMID: 28725936 DOI: 10.1007/s00436-017-5559-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/11/2017] [Indexed: 10/19/2022]
Abstract
The present study records the ultrastructural organization of the mature spermatozoon of Opisthorchis viverrini by means of transmission electron microscopy. The spermatozoon of O. viverrini is a filiform cell, tapered at both extremities. It exhibits the characteristics of type IV spermatozoon of digeneans, namely with two axonemes of the 9+'1' trepaxonematan pattern, external ornamentation of the plasma membrane associated with cortical microtubules that are in the posterior part of the anterior region of the sperm cell, and with two mitochondria. The maximal number of cortical microtubules is in the anterior part of the spermatozoon and arranged into two bundles. Other characteristics are spine-like bodies and a posterior extremity with only the second axoneme. Ultrastructural characters of the spermatozoon of O. viverrini are compared with those of other known digeneans belonging to the Opisthorchioidea, with particular emphasis on representatives of the family Opisthorchiidae. The main differences between O. viverrini and its congener Opisthorchis felineus are the spine-like bodies (present and absent, respectively) and the posterior spermatozoon character (axoneme and nucleus, respectively).
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45
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Trevisan C, Fèvre EM, Owiny M, Ngere I, Vang Johansen M. Minyoo Matata - The Vicious Worm - A Taenia solium Computer-Based Health-Education Tool - in Swahili. Trends Parasitol 2017. [PMID: 28634004 PMCID: PMC5636612 DOI: 10.1016/j.pt.2017.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lack of knowledge is one of the main risk factors for the spread of the zoonotic parasite Taenia solium. The computer-based health-education tool 'The Vicious Worm' was developed to create awareness and provide evidence-based health education as a specific measure in control strategies. To increase the reach of the tool, a new version in Swahili was developed and can now be downloaded for free from http://theviciousworm.sites.ku.dk.
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Affiliation(s)
- Chiara Trevisan
- Department of Biomedical Sciences, Institute of Tropical Medicine, Nationalestraat 155, 2000 Antwerp, Belgium.
| | - Eric M Fèvre
- Institute of Infection and Global Health, University of Liverpool, Leahurst Campus, Chester High Road, Neston, CH64 7TE, UK; International Livestock Research Institute, Old Naivasha Road, P.O. Box 30709-00100, Nairobi, Kenya
| | - Maurice Owiny
- International Livestock Research Institute, Old Naivasha Road, P.O. Box 30709-00100, Nairobi, Kenya; Kenya Field Epidemiology and Laboratory Training Programme, P.O. Box 22313-00100, Nairobi, Kenya
| | - Isaac Ngere
- International Livestock Research Institute, Old Naivasha Road, P.O. Box 30709-00100, Nairobi, Kenya; Kenya Field Epidemiology and Laboratory Training Programme, P.O. Box 22313-00100, Nairobi, Kenya
| | - Maria Vang Johansen
- Department of Veterinary and Animal Sciences, University of Copenhagen, Dyrlægevej 100, 1870 Frederiksberg C, Denmark
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Samico-Fernandes EFT, Samico-Fernandes MFT, de Albuquerque PPF, de Almeida JC, de Souza Santos A, da Rocha Mota A, de Souza Neto OL, Mota RA. Toxoplasma gondii in backyard pigs: seroepidemiology and mouse bioassay. Acta Parasitol 2017; 62:466-470. [PMID: 28426411 DOI: 10.1515/ap-2017-0054] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/20/2017] [Indexed: 11/15/2022]
Abstract
The aim of this study was to evaluate the occurrence of Toxoplasma gondii in backyard pigs destined for human consumption in Pernambuco state, Brazil. Blood and tissue samples (liver, heart, brain, lung and diaphragm) were collected from 224 pigs from legal slaughterhouses and tested for T. gondii infection. Antibodies to T. gondii were found in the sera of 37.9% (85/224) by using the immunofluorescence antibody test (cut-off - 1:64). Tissue samples from seropositive pigs were bioassayed in mice. Tissue samples from seropositive pigs and from mice of the bioassay were submitted to histopathology, immunohistochemistry, polymerase chain reaction (PCR) and sequencing; 14.1% of pig tissue samples and 27.7% of bioassayed mouse samples were positive for T. gondii DNA, but all pig and mouse tissues were negative in histopathology analysis and immunochemistry. By using a risk assessment questionnaire, there was significant difference (p<0.001) in seroprevalence of 21.2% (reproducer) and 3.1% (finishing pig). These data serve as indicative of the sanitary conditions and risk of T. gondii infection for backyard pigs. Preventive measures must be implemented by health services to avoid toxoplasmosis human cases due to ingestion of pig meat.
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Affiliation(s)
- Erika Fernanda Torres Samico-Fernandes
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - Marcela Fernanda Torres Samico-Fernandes
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - Pedro Paulo Feitosa de Albuquerque
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - Jonatas Campos de Almeida
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - André de Souza Santos
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - André da Rocha Mota
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - Orestes Luiz de Souza Neto
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
| | - Rinaldo Aparecido Mota
- Rua Dom Manoel de Medeiros s/n. Dois Irmãos, Recife - PE. Brazil. CEP: 52171-900. Laboratório de Doenças Infectocontagiosas, Departamento de Medicina Veterinária/Universidade Federal Rural de Pernambuco
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47
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Chaves RD, Silva AR, Alvarenga VO, Pereira JL, Mousavi Khaneghah A. The modeling of time to enterotoxin detection ofStaphylococcus aureusin chicken meat. J Food Saf 2017. [DOI: 10.1111/jfs.12342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rafael D. Chaves
- Department of Food Science, Faculty of Food Engineering; University of Campinas (UNICAMP); Campinas São Paulo Brazil
| | | | - Verônica O. Alvarenga
- Department of Food Science, Faculty of Food Engineering; University of Campinas (UNICAMP); Campinas São Paulo Brazil
| | - José L. Pereira
- Department of Food Science, Faculty of Food Engineering; University of Campinas (UNICAMP); Campinas São Paulo Brazil
| | - Amin Mousavi Khaneghah
- Department of Food Science, Faculty of Food Engineering; University of Campinas (UNICAMP); Campinas São Paulo Brazil
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48
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Abstract
Foodborne viral illness, resulting from the consumption of contaminated food or water containing pathogenic viruses, remains a major public health problem globally with substantial economic impact. Major challenges regarding recognizing, detecting, characterizing, and effectively responding to foodborne viral threats to health exist. Adequate health crisis management is largely dependent on early detection of potential public health threats, which is hampered by changing trends in disease outbreaks, from localized clusters of disease in confined populations to dispersed outbreaks with excellent opportunity for further transmission. In addition, no precise and consistent global baseline syndrome and diagnostic surveillance information exists. An integrated multidisciplinary approach with a combination of sustained pathogen syndrome and diagnostic surveillance, genomics-based, and standardized global analytical networks gathering clinical, epidemiological and genetic data alike would be required to understand the dynamics of foodborne viral infection and to mitigate potential effects of future threats. A huge global effort in virus syndrome and diagnostic surveillance may be justified in the light of global health impact in general, and timely with the development of new metagenomics tools that hold the promise of not only identifying viral pathogens, but possibly the complete microbiome in a single assay.
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49
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Deplazes P, Rinaldi L, Alvarez Rojas CA, Torgerson PR, Harandi MF, Romig T, Antolova D, Schurer JM, Lahmar S, Cringoli G, Magambo J, Thompson RCA, Jenkins EJ. Global Distribution of Alveolar and Cystic Echinococcosis. ADVANCES IN PARASITOLOGY 2017; 95:315-493. [PMID: 28131365 DOI: 10.1016/bs.apar.2016.11.001] [Citation(s) in RCA: 566] [Impact Index Per Article: 80.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Alveolar echinococcosis (AE) and cystic echinococcosis (CE) are severe helminthic zoonoses. Echinococcus multilocularis (causative agent of AE) is widely distributed in the northern hemisphere where it is typically maintained in a wild animal cycle including canids as definitive hosts and rodents as intermediate hosts. The species Echinococcus granulosus, Echinococcus ortleppi, Echinococcus canadensis and Echinococcus intermedius are the causative agents of CE with a worldwide distribution and a highly variable human disease burden in the different endemic areas depending upon human behavioural risk factors, the diversity and ecology of animal host assemblages and the genetic diversity within Echinococcus species which differ in their zoonotic potential and pathogenicity. Both AE and CE are regarded as neglected zoonoses, with a higher overall burden of disease for CE due to its global distribution and high regional prevalence, but a higher pathogenicity and case fatality rate for AE, especially in Asia. Over the past two decades, numerous studies have addressed the epidemiology and distribution of these Echinococcus species worldwide, resulting in better-defined boundaries of the endemic areas. This chapter presents the global distribution of Echinococcus species and human AE and CE in maps and summarizes the global data on host assemblages, transmission, prevalence in animal definitive hosts, incidence in people and molecular epidemiology.
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Affiliation(s)
- P Deplazes
- University of Zürich, Zurich, Switzerland
| | - L Rinaldi
- University of Naples Federico II, Napoli, Italy
| | | | | | - M F Harandi
- Research centre of Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, Iran
| | - T Romig
- University of Hohenheim, Stuttgart, Germany
| | - D Antolova
- Institute of Parasitology SAS, Kosice, Slovak Republic
| | - J M Schurer
- University of Saskatchewan, Saskatoon, SK, Canada; University of Washington, Seattle, WA, United States
| | - S Lahmar
- National School of Veterinary Medicine, Sidi Thabet, Tunisia
| | - G Cringoli
- University of Naples Federico II, Napoli, Italy
| | - J Magambo
- Meru University of Science and Technology, Meru, Kenya
| | | | - E J Jenkins
- University of Saskatchewan, Saskatoon, SK, Canada
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50
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Gabriël S, Dorny P, Mwape KE, Trevisan C, Braae UC, Magnussen P, Thys S, Bulaya C, Phiri IK, Sikasunge CS, Makungu C, Afonso S, Nicolau Q, Johansen MV. Control of Taenia solium taeniasis/cysticercosis: The best way forward for sub-Saharan Africa? Acta Trop 2017; 165:252-260. [PMID: 27140860 DOI: 10.1016/j.actatropica.2016.04.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 04/22/2016] [Accepted: 04/23/2016] [Indexed: 11/15/2022]
Abstract
Taenia solium taeniasis/cysticercosis is a neglected parasitic zoonosis with significant economic and public health impacts. Control measures can be broadly grouped into community health education, improvements in hygiene and sanitary conditions, proper meat handling at household and community level, improved standards of meat inspection, pig management, treatment of individual patients and possibly human populations, and treatment and/or vaccination of porcine populations. This manuscript looks critically into currently existing control options and provides suggestions on which (combination of) tools would be most effective in the control of T. solium taeniasis/cysticercosis in sub-Saharan Africa. Field data and disease transmission simulations suggest that implementation of a single intervention control strategy will not lead to a satisfactory reduction of disease morbidity or transmission. A feasible strategy to combat T. solium taeniasis/cysticercosis would include a combination of approaches focussing on both human (health education and treatment) and animal host (management, treatment and vaccination), which can vary for different communities and different geographical locations. Selection of the specific strategy depends on cost-effectiveness analyses based on solid field data, currently unavailable, though urgently needed; as well as on health priorities and resources of the country. A One Health approach involving medical, veterinary, environmental and social sectors is essential for T. solium to be controlled and eventually eliminated. Finally the success of any intervention is largely dependent on the level of societal and political acceptance, commitment and engagement.
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Affiliation(s)
- S Gabriël
- Institute of Tropical Medicine, Antwerp, Belgium.
| | - P Dorny
- Institute of Tropical Medicine, Antwerp, Belgium; Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - K E Mwape
- School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - C Trevisan
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - U C Braae
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - P Magnussen
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - S Thys
- Institute of Tropical Medicine, Antwerp, Belgium
| | - C Bulaya
- School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - I K Phiri
- School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - C S Sikasunge
- School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - C Makungu
- School of Veterinary Medicine, University of Zambia, Lusaka, Zambia
| | - S Afonso
- Faculty of Veterinary Medicine, Eduardo Mondlane University, Maputo, Mozambique
| | - Q Nicolau
- Faculty of Veterinary Medicine, Eduardo Mondlane University, Maputo, Mozambique
| | - M V Johansen
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
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