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Behniafar H, Sepidarkish M, Tadi MJ, Valizadeh S, Gholamrezaei M, Hamidi F, Pazoki H, Alizadeh F, Kianifard N, Nooshabadi MS, Bagheri K, Hemmati F, Hemmati T, Tori NA, Siddiq A, Rostami A. The global prevalence of Trichuris trichiura infection in humans (2010-2023): A systematic review and meta-analysis. J Infect Public Health 2024; 17:800-809. [PMID: 38537575 DOI: 10.1016/j.jiph.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/01/2024] [Accepted: 03/03/2024] [Indexed: 04/15/2024] Open
Abstract
This systematic review and meta-analysis study aimed to evaluate global Trichuris infection prevalence, assessing progress towards the WHO's 2030 target. We searched international databases from 2010-2023, categorizing data by regions and socio-economic variables using a random-effects model. Analyzing 757 articles covering 7154,842 individuals from 78 countries, the study found a pooled global prevalence of (6.64-7.57%), with the highest rates in the Caribbean (21.72%; 8.90-38.18%) and South-East Asia (20.95; 15.71-26.71%) regions. Southern Africa (9.58; 2.11-21.46%), Latin America (9.58; 2.11-21.46%), and Middle Africa Middle Africa (8.94; 6.31-11.98%) also exhibited high prevalence. Eastern Europe had the lowest prevalence at 0.16% (0.09-0.24). Approximately 513 (480-547) million people worldwide were estimated to harbor Trichuris. Moreover ∼1.5% of people tested worldwide (2010-2023) had a moderate to heavy intensity of infection. The study emphasizes the persistent global health threat of Trichuris infection, urging tailored strategies for effective control and prevention on a global scale.
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Affiliation(s)
- Hamed Behniafar
- Department of Medical Parasitology, Sarab Faculty of Medical Sciences, Sarab, Iran
| | - Mahdi Sepidarkish
- Department of Biostatistics and Epidemiology, School of Public Health, Babol University of Medical Sciences, Babol, Iran
| | - Mehrdad Jafari Tadi
- Department of Cell and Molecular Medicine, Rush University Medical Center, Chicago, IL 60607, USA
| | - Soghra Valizadeh
- Department of Food Hygiene and Aquatic, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Mostafa Gholamrezaei
- Department of Parasitology and Mycology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Faezeh Hamidi
- Department of Laboratory Sciences and Microbiology, Faculty of Medical Sciences, Tabriz Medical Sciences, Islamic Azad University, Tabriz, Iran
| | - Hossein Pazoki
- Department of Medical Microbiology, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Science, Gonabad, Iran
| | - Faezeh Alizadeh
- Department of Pharmaceutical Sciences, University of Illinois, Chicago, USA
| | - Nazanin Kianifard
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Kimia Bagheri
- Infectious Diseases and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Faezeh Hemmati
- Student Research Committee, Sarab Faculty of Medical Sciences, Sarab, Iran
| | - Taha Hemmati
- Student Research Committee, Sarab Faculty of Medical Sciences, Sarab, Iran
| | - Neda Ahmazadeh Tori
- Infectious Diseases and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | | | - Ali Rostami
- Infectious Diseases and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran.
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Ross K. Locally acquired strongyloidiasis in remote Australia: why are there still cases? Philos Trans R Soc Lond B Biol Sci 2024; 379:20220435. [PMID: 38008121 PMCID: PMC10676813 DOI: 10.1098/rstb.2022.0435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/20/2023] [Indexed: 11/28/2023] Open
Abstract
In Australia, strongyloidiasis primarily affects returned travellers, Vietnam veterans and refugees or asylum seekers, and First Nations people. Non-overseas acquired cases are seen almost exclusively in Australian First Nations remote communities. Australian First Nations communities have one of the highest rates of strongyloidiasis in the world. Our work has shown that strongyloidiasis is a disease of poverty. Acknowledging this is important-we need to shift the lens to socioeconomic factors, particularly environmental health hardware such as working toilets and sewerage systems, showers and laundries, and effective wastewater and rubbish removal. The rates of strongyloidiasis in First Nations communities is a result of decades of inadequate, poorly constructed and/or poorly maintained housing, and poor environmental health hardware (hereafter hardware). The solution lies in adequate funding, resulting in well designed and maintained housing and appropriate hardware. Governments need to allow First Nations communities themselves to take the lead role in funding allocation, and design, construction and maintenance of their housing and hardware. This will ensure housing and hardware fulfils cultural and physical needs and desires, and protects health. Improving housing and hardware will also improve other health outcomes. This article is part of the Theo Murphy meeting issue 'Strongyloides: omics to worm-free populations'.
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Affiliation(s)
- Kirstin Ross
- Environmental Health, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia
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Rotejanaprasert C, Chuaicharoen P, Prada JM, Thantithaveewat T, Adisakwattana P, Pan-ngum W. Evaluation of Kato-Katz and multiplex quantitative polymerase chain reaction performance for clinical helminth infections in Thailand using a latent class analysis. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220281. [PMID: 37598708 PMCID: PMC10440171 DOI: 10.1098/rstb.2022.0281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 05/27/2023] [Indexed: 08/22/2023] Open
Abstract
Using an appropriate diagnostic tool is essential to soil-transmitted helminth control and elimination efforts. Kato-Katz (KK) is the most commonly used diagnostic, but recently other tools, such as real-time quantitative polymerase chain reaction (multiplex qPCR), are starting to be employed more. Here, we evaluated the performance of these two diagnostic tools for five helminth species in Thailand. In the absence of a gold standard, diagnostic performance can be evaluated using latent class analysis. Our results suggest that in moderate to high prevalence settings above 2% multiplex qPCR could be more sensitive than KK, this was particularly apparent for Opisthorchis viverrini in the northeastern provinces. However, for low prevalence, both diagnostics suffered from low sensitivity. Specificity of both diagnostics was estimated to be high (above 70%) across all settings. For some specific helminth infection such as O. viverrini, multiplex qPCR is still a preferable choice of diagnostic test. KK performed equally well in detecting Ascaris lumbricoides and Taenia solium when the prevalence is moderate to high (above 2%). Neither test performed well when the prevalence of infection is low (below 2%), and certainly in the case for hookworm and Trichuris trichiura. Combination of two or more diagnostic tests can improve the performance although the cost would be high. Development of new methods for helminth surveillance at the pre-elimination phase is therefore very important. This article is part of the theme issue 'Challenges and opportunities in the fight against neglected tropical diseases: a decade from the London Declaration on NTDs'.
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Affiliation(s)
- Chawarat Rotejanaprasert
- Department of Tropical Hygiene, Mahidol University, Bangkok, Thailand
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
| | | | - Joaquin M. Prada
- Faculty of Health and Medical Sciences, School of Veterinary Medicine, University of Surrey, Guildford, UK
| | | | - Poom Adisakwattana
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Wirichada Pan-ngum
- Department of Tropical Hygiene, Mahidol University, Bangkok, Thailand
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
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Oyeyemi OT, Okunlola OA. Soil-transmitted helminthiasis (STH) endemicity and performance of preventive chemotherapy intervention programme in Nigeria (in year 2021). Sci Rep 2023; 13:10155. [PMID: 37349411 PMCID: PMC10287726 DOI: 10.1038/s41598-023-37402-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/21/2023] [Indexed: 06/24/2023] Open
Abstract
Preventive chemotherapy (PC) is an important tool to address transmission and reduce morbidities associated with soil-transmitted helminths (STHs). The aim of the study is to assess the PC implementation programme coverage and relate the same to the endemicity of STH in Nigeria. The secondary data collected by the World Health Organization (WHO) through the expanded special project for elimination of neglected tropical diseases (ESPEN) and made available at the ESPEN portal was used for the study. The PC implementation coverage and frequency of treatment were evaluated and related to STH endemicity levels in Nigeria. STH was actively transmitted in all six geopolitical zones of Nigeria. The southern part of Nigeria was more endemic compared with northern Nigeria. There was no PC intervention in preschoolers and effective PC coverage (19.3%) fell below the WHO ≥ 75% PC coverage index benchmark in school children. The percentages of children that harbour low, moderate, and high STH infections were 41.5, 41.6, and 13.4%, respectively. Multiple treatments did not necessarily reduce the endemicity of STH on certain occasions. STH continues to be a public health threat in Nigeria. The current treatment strategies should be reviewed to accommodate preschoolers in PC implementation programmes. Treatment should be integrated with the WASH programme in order to achieve a lasting impact.
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Affiliation(s)
- Oyetunde T Oyeyemi
- Department of Biosciences and Biotechnology, University of Medical Sciences, Ondo City, Ondo State, Nigeria.
| | - Oluyemi A Okunlola
- Department of Mathematical and Computer Sciences, University of Medical Sciences, Ondo City, Ondo State, Nigeria
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Mukutmoni M, Liza FT, Parvin RA, Nath TC. Perceptions and practices of urban slum-dwelling women concerning soil-transmitted helminths infections in Bangladesh: A cross-sectional study. Parasite Epidemiol Control 2023; 21:e00291. [PMID: 36875174 PMCID: PMC9982025 DOI: 10.1016/j.parepi.2023.e00291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 02/04/2023] [Accepted: 02/15/2023] [Indexed: 02/19/2023] Open
Abstract
Introduction Soil-transmitted helminths (STH) infections are still attributed to a significant part of mortality and disabilities in developing nations. This study aimed at exploring the perceptions and practices concerning STH and to assess the associated risk of infections among slum-dwelling women of Dhaka South City Corporations (DSCC), Bangladesh. Materials and methods A cross-sectional study was conducted in two selected slums (Malibagh and Lalbagh) of DSCC, Bangladesh, from September 2020 to February 2021. A total of 206 women participants were requested to provide stool samples, followed by a semi-structured questionnaire survey. Parasitological assessment was done by the formol-ether concentration (FEC) technique. Data were analyzed using descriptive statistics, and p-value < 0.05 was considered as statistically significant. An adjusted odds ratio (AOR) with a 95% confidence interval (95% CI) was estimated using logistic regression analysis to examine the association between explanatory and outcome factors. Results In total, 36 (17.5%) STH infections were observed out of 206 examined participants. Among the STH, Trichuris trichiura showed the highest prevalence (10.7%), followed by Ascaris lumbricoides (5.3%). Lack of formal education, overcrowded living, large family sizes, and using shared toilets were significantly associated with STH infections. Irregular nail cutting (AOR = 3.12), irregular soap usage after toilet (AOR = 2.98), wearing no shoes (AOR = 4.64), and failing to teach kids to wash their hands (AOR = 3.87) were revealed as practice concerns linked to high STH prevalence. Women, who had never heard about STH (AOR = 2.42) and had no misconceptions regarding STH (AOR = 1.94) were positively related to STH infection in this study. Conclusion Slum-dwelling women in Bangladesh still had a substantial infection of STH. Most of the communities under study were unaware of parasite infection and its negative effects on health. Revision of the policy of ongoing anthelmintic distribution programs and widespread health education programs are recommended aimed at controlling STH.
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Affiliation(s)
| | | | | | - Tilak Chandra Nath
- Department of Parasitology, Sylhet Agricultural University, Sylhet, Bangladesh
- Corresponding author.
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Raw C, Traub RJ, Zendejas-Heredia PA, Stevenson M, Wiethoelter A. A systematic review and meta-analysis of human and zoonotic dog soil-transmitted helminth infections in Australian Indigenous communities. PLoS Negl Trop Dis 2022; 16:e0010895. [PMID: 36279298 PMCID: PMC9632820 DOI: 10.1371/journal.pntd.0010895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 11/03/2022] [Accepted: 10/14/2022] [Indexed: 11/06/2022] Open
Abstract
Soil-transmitted helminths (STH) infect 1.5 billion people and countless animals worldwide. In Australian Indigenous communities, STH infections have largely remained endemic despite control efforts, suggesting reservoirs of infection may exist. Dogs fulfil various important cultural, social and occupational roles in Australian Indigenous communities and are populous in these settings. Dogs may also harbour zoonotic STHs capable of producing morbidity and mortality in dogs and humans. This review provides an overview of human and zoonotic STH infections, identifies the Australian Indigenous locations affected and the parasite species and hosts involved. The meta-analysis provides estimates of individual study and pooled true prevalence of STH infections in Australian Indigenous communities and identifies knowledge gaps for further research on zoonotic or anthroponotic potential. A systematic literature search identified 45 eligible studies documenting the presence of Strongyloides stercoralis, Trichuris trichiura, Ancylostoma caninum, Ancylostoma duodenale, Ancylostoma ceylanicum, undifferentiated hookworm, and Ascaris lumbricoides. Of these studies, 26 were also eligible for inclusion in meta-analysis to establish true prevalence in the light of imperfect diagnostic test sensitivity and specificity by Rogan-Gladen and Bayesian methods. These studies revealed pooled true prevalence estimates of 18.9% (95% CI 15.8–22.1) for human and canine S. stercoralis infections and 77.3% (95% CI 63.7–91.0) for canine A. caninum infections indicating continued endemicity, but considerably more heterogenous pooled estimates for canine A. ceylanicum infections, and A. duodenale, undifferentiated hookworm and T. trichiura in humans. This review suggests that the prevalence of STHs in Australian Indigenous communities has likely been underestimated, principally based on imperfect diagnostic tests. Potential misclassification of hookworm species in humans and dogs due to outdated methodology, also obscures this picture. High-quality contemporary studies are required to establish current true prevalence of parasite species in all relevant hosts to guide future policy development and control decisions under a culturally sound One Health framework. Soil-transmitted helminths include hookworms, threadworms, whipworms and roundworms. These worms may infect different hosts including humans and dogs, and some species are zoonotic, meaning that they are able to transmit between animals and humans. In many Australian Indigenous communities, people remain infected with these worms at high rates compared to other parts of the country despite various control strategies. Resource and health literacy inequalities are primary drivers for these differences. However, the potential for dogs to act as reservoirs for zoonotic worm infections in humans must also be considered. For this reason, it’s important to create a clear picture of the level of infection by location and host. Given that tests used to establish prevalence can produce false positive or negative results, we performed a meta-analysis allowing comparison of true prevalence estimates by location and host, regardless of the test used. This review suggests that threadworm and dog hookworm remain endemic in Australian Indigenous communities, though a gap exists to accurately inform the prevalence of the other worms. It also highlights the need for One Health strategies in research, policy and control where humans, all animal hosts and the environment are considered in a culturally relevant way.
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Affiliation(s)
- Cameron Raw
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
- * E-mail:
| | - Rebecca J. Traub
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Patsy A. Zendejas-Heredia
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Mark Stevenson
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Anke Wiethoelter
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
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Efficient and Scalable Process to Produce Novel and Highly Bioactive Purified Cytosolic Crystals from Bacillus thuringiensis. Microbiol Spectr 2022; 10:e0235622. [PMID: 35946940 PMCID: PMC9430767 DOI: 10.1128/spectrum.02356-22] [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] [Indexed: 11/22/2022] Open
Abstract
Bacillus thuringiensis (Bt) is a Gram-positive soil bacterium that is widely and safely applied in the environment as an insecticide for combatting insect pests that damage crops or are disease vectors. Dominant active ingredients made by Bt are insect-killing crystal (Cry) proteins released as crystalline inclusions upon bacterial sporulation. Some Bt Cry proteins, e.g., Cry5B (formally Cry5Ba1), target nematodes (roundworms) and show exceptional promise as anthelmintics (cures for parasitic nematode diseases). We have recently described inactivated bacteria with cytosolic crystal(s) (IBaCC) in which bioactive Bt Cry crystals (containing Cry5B) are fully contained within the cytosol of dead bacterial ghosts. Here, we demonstrate that these IBaCC-trapped Cry5B crystals can be liberated and purified away from cellular constituents, yielding purified cytosolic crystals (PCC). Cry5B PCC contains ~95% Cry5B protein out of the total protein content. Cry5B PCC is highly bioactive against parasitic nematode larvae and adults in vitro. Cry5B PCC is also highly active in vivo against experimental human hookworm and Ascaris infections in rodents. The process was scaled up to the 100-liter scale to produce PCC for a pilot study to treat two foals infected with the ascarid Parascaris spp. Single-dose Cry5B PCC brought the fecal egg counts of both foals to zero. These studies describe the process for the scalable production of purified Bt crystals and define a new and attractive pharmaceutical ingredient form of Bt Cry proteins. IMPORTANCEBacillus thuringiensis crystal proteins are widely and safely used as insecticides. Recent studies have shown they also can cure gastrointestinal parasitic worm (nematode) infections when ingested. However, reproducible, scalable, and practical techniques for purifying these proteins have been lacking. Here, we address this severe limitation and present scalable and practical methods for large-scale purification of potently bioactive B. thuringiensis crystals and crystal proteins. The resultant product, called purified cytosolic crystals (PCC), is highly compatible with ingestible drug delivery and formulation. Furthermore, there are growing applications in agriculture and insect control where access to large quantities of purified crystal proteins is desirable and where these methods will find great utility.
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Alnaz ARM, Darlan DM, Andriyani Y, Lubis RR. Hemoglobin Level and Risk of Anemia in Soil-Transmitted Helminths Infections among Children: A Systematic Review and Meta-analysis. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.8974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Introduction. Soil Transmitted Helminthiasis (STH) is a Neglected Tropical Disease with almost 25% world population infected. Children were vulnerable to infection with morbidities affecting growth. STH infection alters children nutritional status which potentially causing anemia. Meta-analysis relating STH infections to hemoglobin (Hb) level and risk of anemia in children is limited.
Aim. To compare hemoglobin levels and risk of anemia in children infected and uninfected with STH.
Methods. Meta-analysis conducted from journals obtained from Pubmed, ScienceDirect, WileyLibrary, Cochrane, EBSCO, Proquest, DOAJ, and GoogleScholar from 2011-2021. Full text cross sectional studies on children with relevant topic is included, while unclear, inaccessible, or post interventional studies were excluded. Articles were analyzed in Review Manager 5.4 in mean difference (MD) and odds ratio (OR) with Confidence Interval (CI) of 95%.
Result. Out of 25,683 articles in literature search, 29 were eligible for systematic review and meta-analysis. STH infection significantly decreases hemoglobin level (MD -0.2g/dL; p=0.02) and increases risk of anemia (OR 1.83; p<0.00001). Species analysis presented parallel result on Trichuris trichiura (MD -0.31g/dL; p=0.001 and OR 1.66; p=0.009), Hookworm (MD -0.56g/dL; p=0.02 and OR 3.3; p<0.00001), and multiple infection (MD -0.25g/dL; p=0.03 and OR 4.49; p=0.005). Ascaris lumbricoides didn’t show significance on hemoglobin level but comparable for risk of anemia (MD -0.16g/dL; p=0.17 and OR 1.57; p=0.001).
Discussion. All STH infections exhibits lower hemoglobin level and higher risk of anemia caused by lower nutrition absorption and occult bleeding in gastrointestinal tract. Hookworm and multiple infections has the highest risk of anemia. Proportion of anemia may vary in studies and influenced by sociodemographic characteristics, but higher proportions occur in STH infected.
Conclusion. Children infected with STH has lower hemoglobin level and in risk of anemia compared to uninfected children, hence further study is still needed to be conducted.
Keywords: Anemia, Children, Hemoglobin, Infection, Soil Transmitted Helminths
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Badri M, Olfatifar M, Wandra T, Budke CM, Mahmoudi R, Abdoli A, Hajialilo E, Pestehchian N, Ghaffarifar F, Foroutan M, Hashemipour S, Sotoodeh S, Samimi R, Eslahi AV. The prevalence of human trichuriasis in Asia: a systematic review and meta-analysis. Parasitol Res 2022; 121:1-10. [PMID: 34993634 DOI: 10.1007/s00436-021-07365-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 10/27/2021] [Indexed: 11/30/2022]
Abstract
Trichuriasis is one of the most common soil-transmitted helminth (STH) infections, affecting populations globally. The condition is particularly prevalent in tropical and subtropical areas with low levels of sanitation and poor living conditions. The objective of this systematic review and meta-analysis was to evaluate the prevalence of Trichuris trichiura infection in Asia at the country and region level. Multiple databases/academic search engines (Web of Science, PubMed, ProQuest, Scopus, and Google Scholar) were searched for literature on T. trichiura prevalence in Asia published through January 2021. Pooled prevalence was determined using the meta-package in R (version 3.6.1). Out of 13,836 articles, 226 studies (5,439,500 individuals) from 26 countries met the inclusion criteria. Of the 226 studies, 151 were community-based studies that included individuals across the age spectrum, while 75 studies focused on school children (typically in the 5-16 years age range). The overall T. trichiura pooled prevalence was 15.3% (95% CI: 12.4-19.1%), with a pooled prevalence of 13.3% (95% CI: 10.0-17.1%) for the community studies and 20.9% (95% CI: 14.7-27.9%) for the studies only including school children. For studies including all age groups, individuals in the 1-15 years age group had the highest pooled prevalence at 23.4% (95% CI: 1.7-49.4%). There was a significant difference found in overall pooled prevalence by sex (p < 0.001) and community type (rural versus urban) (p < 0.001). Although prevalence appears to be decreasing, study findings suggest that T. trichiura infection continues to be a public health problem in Asia. Therefore, control programs focused on at-risk individuals in endemic areas are needed.
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Affiliation(s)
- Milad Badri
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Meysam Olfatifar
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Toni Wandra
- Directorate of Postgraduate, Sari Mutiara Indonesia University, Medan, Indonesia
| | - Christine M Budke
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine & Biomedical Sciences, Texas A & M University, College Station, TX, USA
| | - Razzagh Mahmoudi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Amir Abdoli
- Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Elham Hajialilo
- Department of Parasitology and Mycology, Qazvin University of Medical Sciences, Qazvin, Iran.,Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Nader Pestehchian
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ghaffarifar
- Department of Parasitology and Entomology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Foroutan
- Research Center for Environmental Contaminants (RCEC), Abadan University of Medical Sciences, Abadan, Iran
| | - Sima Hashemipour
- Metabolic Diseases Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Simin Sotoodeh
- Clinical Research Development Unit, Kosar Hospital, Qazvin University Of Medical Sciences, Qazvin, Iran
| | - Rasoul Samimi
- Children Growth Research Center Research Institute for Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Aida Vafae Eslahi
- Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
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Inactivating Effects of Common Laboratory Disinfectants, Fixatives, and Temperatures on the Eggs of Soil Transmitted Helminths. Microbiol Spectr 2021; 9:e0182821. [PMID: 34908464 PMCID: PMC8672909 DOI: 10.1128/spectrum.01828-21] [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] [Indexed: 11/20/2022] Open
Abstract
Soil-transmitted helminths (STH) are important and widespread intestinal pathogens of humans and animals. It is presently unknown which inactivating procedures may be universally effective for safe transport, preservation, and disinfection of STH-contaminated specimens, and this lack of knowledge may expose laboratory staff to higher risk of laboratory-acquired infections (LAI’s). There are limited data on the efficacy of commonly used disinfectants and fecal fixatives for inactivating the eggs of STH. This work tested five disinfectants for surface cleanup, four storage temperature conditions, and six transport/storage fixatives, to inactivate eggs of three species of STH of animal origin (Ascaris suum “roundworm,” Trichuris vulpis “whipworm” and Ancylostoma caninum “hookworm”) as surrogates for human STH. Among disinfectants, exposure to 10% povidone-iodine for ≥5 min inactivated 100% of the three species tested, while 5 min exposure to 95% ethanol inactivated T. vulpis and A. caninum eggs. All of the fixatives tested had inactivation effects on A. caninum hookworm eggs within 24 h of exposure, except potassium dichromate, which required 48 h. 95% ethanol for ≥48 h inactivated eggs from all three STH species. Freezing at ≤−20°C for ≥24 h inactivated eggs of T. vulpis and A. caninum, but only freezing at −80°C for ≥24 h inactivated >99% eggs, including A. suum. This work provides an evidence base for health and safety guidelines and mitigation strategies for the handling, storage, and disposal of stool samples containing STH eggs in laboratory, health care, childcare, or veterinary settings. IMPORTANCE This study systematically evaluates common laboratory disinfectants and storage conditions for their effectiveness in inactivating the infective stages of soil-transmitted helminths (STH). Animal-infecting proxy species were chosen to represent three major groups of STH that infect humans: roundworms, whipworms, and hookworms. Previously published work in this area typically focuses on a particular inactivation method, either for a single STH species, or on a subset of closely related species. Because prediagnostic fecal specimens must be regarded as potentially infectious with a mix of species, such information may be of limited utility in a working laboratory. We provide a straightforward summary of storage and disinfection methods that can achieve complete inactivation across a range of STH species, which represents a significant advance for clinical, veterinary and research laboratory biosafety.
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Rogers MJ, McManus DP, Muhi S, Gordon CA. Membrane Technology for Rapid Point-of-Care Diagnostics for Parasitic Neglected Tropical Diseases. Clin Microbiol Rev 2021; 34:e0032920. [PMID: 34378956 PMCID: PMC8404699 DOI: 10.1128/cmr.00329-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Parasitic neglected tropical diseases (NTDs) affect over one billion people worldwide, with individuals from communities in low-socioeconomic areas being most at risk and suffering the most. Disease management programs are hindered by the lack of infrastructure and resources for clinical sample collection, storage, and transport and a dearth of sensitive diagnostic methods that are inexpensive as well as accurate. Many diagnostic tests and tools have been developed for the parasitic NTDs, but the collection and storage of clinical samples for molecular and immunological diagnosis can be expensive due to storage, transport, and reagent costs, making these procedures untenable in most areas of endemicity. The application of membrane technology, which involves the use of specific membranes for either sample collection and storage or diagnostic procedures, can streamline this process, allowing for long-term sample storage at room temperature. Membrane technology can be used in serology-based diagnostic assays and for nucleic acid purification prior to molecular analysis. This facilitates the development of relatively simple and rapid procedures, although some of these methods, mainly due to costs, lack accessibility in low-socioeconomic regions of endemicity. New immunological procedures and nucleic acid storage, purification, and diagnostics protocols that are simple, rapid, accurate, and cost-effective must be developed as countries progress control efforts toward the elimination of the parasitic NTDs.
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Affiliation(s)
- Madeleine J. Rogers
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland, Australia
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Donald P. McManus
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Stephen Muhi
- Victorian Infectious Diseases Service, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Catherine A. Gordon
- Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
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12
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Gerber V, Le Govic Y, Ramade C, Chemla C, Hamane S, Desoubeaux G, Durieux MF, Degeilh B, Abou-Bacar A, Pfaff AW, Candolfi E, Greigert V, Brunet J. Ancylostoma ceylanicum as the second most frequent hookworm species isolated in France in travellers returning from tropical areas. J Travel Med 2021; 28:6121697. [PMID: 33506263 DOI: 10.1093/jtm/taab014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 01/09/2021] [Accepted: 01/19/2021] [Indexed: 12/12/2022]
Abstract
Ancylostoma ceylanicum is the second most common hookworm species infecting humans in Southeast Asia and Oceania. We performed a 3 years multicenter study to assess its frequency in hookworm infecting patients returning from tropical areas to France and found that A. ceylanicum was the second most frequent hookworm species isolated.
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Affiliation(s)
- Victor Gerber
- Institut de Parasitologie et Pathologie Tropicale, Université de Strasbourg, 67000 Strasbourg, France
| | - Yohann Le Govic
- Laboratoire de Parasitologie-Mycologie, Centre Hospitalier Universitaire, Université d'Angers, 49035 Angers, France
| | - Cécile Ramade
- Hospices Civils de Lyon, Institut des Agents Infectieux, Parasitologie Mycologie, Hôpital de la Croix-Rousse, 69004 Lyon, France
| | - Cathy Chemla
- EA7510 ESCAPE, Université de Reims Champagne Ardenne et Laboratoire de Parasitologie-Mycologie CHU Reims, 51092 Reims, France
| | - Samia Hamane
- Laboratoire de Parasitologie-Mycologie, Hôpital Saint-Louis, 75010 Paris, France
| | | | | | - Brigitte Degeilh
- Laboratoire de Parasitologie-Mycologie, CHU Rennes, Rue Henri le Guillou, 35033 Rennes, France
| | - Ahmed Abou-Bacar
- Institut de Parasitologie et Pathologie Tropicale, Université de Strasbourg, 67000 Strasbourg, France.,Laboratoire de Parasitologie et de Mycologie Médicales, Plateau Technique de Microbiologie, Hôpitaux Universitaires de Strasbourg, F-67091 Strasbourg, France
| | - Alexander W Pfaff
- Institut de Parasitologie et Pathologie Tropicale, Université de Strasbourg, 67000 Strasbourg, France.,Laboratoire de Parasitologie et de Mycologie Médicales, Plateau Technique de Microbiologie, Hôpitaux Universitaires de Strasbourg, F-67091 Strasbourg, France
| | - Ermanno Candolfi
- Institut de Parasitologie et Pathologie Tropicale, Université de Strasbourg, 67000 Strasbourg, France.,Laboratoire de Parasitologie et de Mycologie Médicales, Plateau Technique de Microbiologie, Hôpitaux Universitaires de Strasbourg, F-67091 Strasbourg, France
| | - Valentin Greigert
- Institut de Parasitologie et Pathologie Tropicale, Université de Strasbourg, 67000 Strasbourg, France
| | - Julie Brunet
- Institut de Parasitologie et Pathologie Tropicale, Université de Strasbourg, 67000 Strasbourg, France.,Laboratoire de Parasitologie et de Mycologie Médicales, Plateau Technique de Microbiologie, Hôpitaux Universitaires de Strasbourg, F-67091 Strasbourg, France
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13
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Gilmour B, Alene KA, Clarke NE, Clements ACA. The prevalence of tuberculosis, malaria and soil-transmitted helminth infection in minority indigenous people of Southeast Asia and the Western Pacific: protocol for a systematic review and meta-analysis. Syst Rev 2021; 10:203. [PMID: 34246316 PMCID: PMC8271287 DOI: 10.1186/s13643-021-01753-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/25/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Infectious diseases such as tuberculosis (TB), malaria and soil-transmitted helminthiasis continue to impose a significant global health burden and socio-economic impact. Globally, minority indigenous people are disproportionately affected by poverty and are shown to experience a disparate burden of disease and poorer health outcomes than the comparative majority population. Despite these inequalities, countries rarely systematically compile epidemiological data disaggregated by ethnicity to enable the extent of the differential to be quantified. METHODS The systematic review will be reported in accordance with The Preferred Reporting Items for Systematic Review and Meta- Analyses (PRISMA) guidelines. Systematic searches will be conducted in EMBASE, Medline, Scopus and Web of Science for studies reporting data which enable the prevalence of TB, malaria, and/or soil-transmitted helminth (STH) infections amongst minority indigenous populations within the Southeast Asia Region (SEAR) and Western Pacific Region (WPR) to be calculated. Where studies provide data on disease prevalence for both minority indigenous and other populations within the same study, a comparative analysis will be undertaken. In addition to a narrative synthesis, where sufficient data are available, a random-effects meta-analysis will be conducted to obtain a pooled estimate value for each disease/infection by country and mortality stratum. Heterogeneity between studies will be examined using the Cochran's Q test and quantitatively measured by the index of heterogeneity squared (I2) statistics. The methodological quality of the included studies will be assessed using a modified Newcastle-Ottawa Scale. DISCUSSION This systematic review aims to analyse the available data on the prevalence of TB, malaria and STH infections within minority indigenous populations of the SEAR and WPR. REGISTRATION Open Science Framework registration: osf.io/m6sqc.
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Affiliation(s)
- Beth Gilmour
- Faculty of Health Sciences, Curtin University, Western Australia, Australia
| | - Kefyalew Addis Alene
- Faculty of Health Sciences, Curtin University, Western Australia, Australia
- Telethon Kids Institute, West Perth, WA Australia
| | - Naomi E. Clarke
- Research School of Population Health, Australian National University, Canberra, ACT Australia
| | - Archie C. A. Clements
- Faculty of Health Sciences, Curtin University, Western Australia, Australia
- Telethon Kids Institute, West Perth, WA Australia
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14
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Mationg MLS, Tallo VL, Williams GM, Gordon CA, Clements ACA, McManus DP, Gray DJ. The control of soil-transmitted helminthiases in the Philippines: the story continues. Infect Dis Poverty 2021; 10:85. [PMID: 34118990 PMCID: PMC8196932 DOI: 10.1186/s40249-021-00870-z] [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: 02/05/2021] [Accepted: 05/27/2021] [Indexed: 03/30/2023] Open
Abstract
Background Soil-transmitted helminth (STH) infections have long been an important public health concern in the Philippines. In this review, we describe the current status of STH infections there and highlight the control efforts undertaken to reduce STH burden. Main text A nationwide STH mass drug administration (MDA) programme was started in 2006 but the overall STH prevalence remains stubbornly high across the Philippines, ranging from 24.9% to 97.4%. The continued increase in the prevalence may have been due to the challenges related to MDA implementation which include the lack of people’s awareness about the importance of regular treatment, misconceptions about the MDA strategy, lack of confidence on the drugs used, fear of adverse events and general distrust of government programs. There are existing water, sanitation and hygiene (WASH) programmes implemented in communities [e.g., Community-Led Total Sanitation (CLTS) program and providing toilet bowls and provision of subsidy for latrine construction] and schools [e.g., WASH in School (WINS) program], but sustained implementation is required to achieve expected outcomes. Although WASH in general is being taught in schools, integration of STH as a disease and community problem in the current public elementary school curriculum is still inadequate. The Integrated Helminth Control Program (IHCP) currently implemented in the country, which is focused on improved sanitation and personal hygiene, health education and preventive chemotherapy, will require continuous appraisal. The sustainability of this programme still continues to be a challenge. Conclusions Despite the major efforts to control STH infections for almost two decades in the Philippines, persistently high STH prevalence has been reported across the country, which is likely due to suboptimal MDA coverage and limitations in WASH and health education programs. Sustainable delivery of integrated control approaches will continue to play a pivotal role in the control and elimination of STH in the Philippines. Graphic abstract ![]()
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Affiliation(s)
- Mary Lorraine S Mationg
- Department of Global Health, Research School of Population Health, The Australian National University, Building 62 Mills Rd, Acton ACT, Canberra, 2601, Australia. .,Department of Epidemiology and Biostatistics, Research Institute for Tropical Medicine, Manila, Philippines.
| | - Veronica L Tallo
- Department of Epidemiology and Biostatistics, Research Institute for Tropical Medicine, Manila, Philippines
| | - Gail M Williams
- School of Public Health, University of Queensland, Brisbane, Australia
| | - Catherine A Gordon
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | | | - Donald P McManus
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Darren J Gray
- Department of Global Health, Research School of Population Health, The Australian National University, Building 62 Mills Rd, Acton ACT, Canberra, 2601, Australia
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15
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Aw JYH, Clarke NE, Mayfield HJ, Lau CL, Richardson A, Vaz Nery S. Novel statistical approaches to identify risk factors for soil-transmitted helminth infection in Timor-Leste. Int J Parasitol 2021; 51:729-739. [PMID: 33798561 PMCID: PMC8378505 DOI: 10.1016/j.ijpara.2021.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 12/02/2022]
Abstract
We compared logistic regression, recursive partitioning and Bayesian networks to identify risk factors for STH infection. Logistic regression identified fewest variables associated with STH infections compared with the two alternative methods. Recursive partitioning identified more demographic and WASH variables, and Bayesian networks more environmental variables. Model performance was similar across all three statistical techniques. Recursive partitioning can identify at-risk population subgroups, while Bayesian networks can run real-time scenarios.
Soil-transmitted helminths (STHs) are parasitic intestinal worms that infect almost a fifth of the global population. Sustainable control of STHs requires understanding the complex interaction of factors contributing to transmission. Identifying risk factors has mainly relied on logistic regression models where the underlying assumption of independence between variables is not always satisfied. Previously demonstrated risk factors including water, sanitation and hygiene (WASH) access and behaviours, and socioeconomic status are intrinsically linked. Similarly, environmental factors including climate, soil and land attributes are often strongly correlated. Alternative methods such as recursive partitioning and Bayesian networks can handle correlated variables, but there are no published studies comparing these methods with logistic regression in the context of STH risk factor analysis. Baseline cross-sectional data from school-aged children in the (S)WASH-D for Worms study were used to compare risk factors identified from modelling the same data using three different statistical techniques. Outcomes of interest were infection with Ascaris spp. and any hookworm species (Necator americanus, Ancylostoma duodenale, and Ancylostoma ceylanicum). Mixed-effects logistic regression identified the fewest risk factors. Recursive partitioning identified the most WASH and demographic risk factors, while Bayesian networks identified the most environmental risk factors. Recursive partitioning produced classification trees that visualised potentially at-risk population sub-groups. Bayesian networks helped visualise relationships between variables and enabled interactive modelling of outcomes based on different scenarios for the predictor variables of interest. Model performance was similar across all techniques. Risk factors identified across all techniques were vegetation for Ascaris spp., and cleaning oneself with water after defecating for hookworm. This study adds to the limited body of evidence exploring alternative data modelling approaches in identifying risk factors for STH infections. Our findings suggest these approaches can provide novel insights for more robust interpretation.
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Affiliation(s)
- Jessica Yi Han Aw
- Research School of Population Health, Australian National University, Canberra, Australia.
| | - Naomi E Clarke
- Research School of Population Health, Australian National University, Canberra, Australia; Kirby Institute, University of New South Wales, Sydney, Australia
| | - Helen J Mayfield
- Research School of Population Health, Australian National University, Canberra, Australia
| | - Colleen L Lau
- Research School of Population Health, Australian National University, Canberra, Australia
| | - Alice Richardson
- Statistical Consulting Unit, Australian National University, Canberra, Australia
| | - Susana Vaz Nery
- Kirby Institute, University of New South Wales, Sydney, Australia
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16
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Urban JF, Nielsen MK, Gazzola D, Xie Y, Beshah E, Hu Y, Li H, Rus F, Flanagan K, Draper A, Vakalapudi S, Li RW, Ostroff GR, Aroian RV. An inactivated bacterium (paraprobiotic) expressing Bacillus thuringiensis Cry5B as a therapeutic for Ascaris and Parascaris spp. infections in large animals. One Health 2021; 12:100241. [PMID: 33889707 PMCID: PMC8048022 DOI: 10.1016/j.onehlt.2021.100241] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 02/07/2023] Open
Abstract
Ascaris and Parascaris are important parasites in the family Ascarididae, large, ubiquitous intestinal-dwelling nematodes infecting all classes of vertebrates. Parasitic nematode drug resistance in veterinary medicine and drug recalcitrance in human medicine are increasing worldwide, with few if any new therapeutic classes on the horizon. Some of these parasites are zoonotic, e.g., Ascaris is passed from humans to pigs and vice versa. The development of new therapies against this family of parasites would have major implications for both human and livestock health. Here we tested the therapeutic ability of a paraprobiotic or dead probiotic that expresses the Bacillus thuringiensis Cry5B protein with known anthelmintic properties, against zoonotic Ascaris suum and Parascaris spp. This paraprobiotic, known as IBaCC, intoxicated A. suum larvae in vitro and was highly effective in vivo against intestinal A. suum infections in a new mouse model for this parasite. Fermentation was scaled up to 350 l to treat pigs and horses. Single dose Cry5B IBaCC nearly completely cleared A. suum infections in pigs. Furthermore, single dose Cry5B IBaCC drove fecal egg counts in Parascaris-infected foals to zero, showing at least parity with, and potential superiority to, current efficacy of anthelmintics used against this parasite. Cry5B IBaCC therefore represents a new, paraprobiotic One Health approach towards targeting Ascarididae that is safe, effective, massively scalable, stable, and useful in human and veterinary medicine in both the developed and developing regions of the world. IBaCC is Bacillus thuringiensis Cry5B protein crystals trapped inside dead bacteria. IBaCC intoxicates Ascaris suum intestinal parasitic nematodes in vitro. IBaCC is highly effective against A. suum parasites in vivo in mice and pigs. IBaCC is highly effective against related Parascaris parasites in foals. IBaCC represents a new paradigm for treating ascarid parasites of humans and animals.
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Affiliation(s)
- Joseph F Urban
- U. S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal and Parasitic Diseases Laboratory, Beltsville, MD, United States of America.,U. S. Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center, Diet, Genomics and Immunology Laboratory, Beltsville, MD, United States of America
| | - Martin K Nielsen
- M.H. Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington, KY, United States of America
| | - David Gazzola
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Yue Xie
- U. S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal and Parasitic Diseases Laboratory, Beltsville, MD, United States of America.,U. S. Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center, Diet, Genomics and Immunology Laboratory, Beltsville, MD, United States of America.,Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Sichuan, China
| | - Ethiopia Beshah
- U. S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal and Parasitic Diseases Laboratory, Beltsville, MD, United States of America.,U. S. Department of Agriculture, Agricultural Research Service, Beltsville Human Nutrition Research Center, Diet, Genomics and Immunology Laboratory, Beltsville, MD, United States of America
| | - Yan Hu
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Hanchen Li
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Florentina Rus
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Kelly Flanagan
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Austin Draper
- Synthetic Biomanufacturing Facility, Utah State University, Logan, UT, United States of America
| | - Sridhar Vakalapudi
- Synthetic Biomanufacturing Facility, Utah State University, Logan, UT, United States of America
| | - Robert W Li
- U. S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal and Parasitic Diseases Laboratory, Beltsville, MD, United States of America
| | - Gary R Ostroff
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
| | - Raffi V Aroian
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States of America
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17
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Kurscheid J, Laksono B, Park MJ, Clements ACA, Sadler R, McCarthy JS, Nery SV, Soares-Magalhaes R, Halton K, Hadisaputro S, Richardson A, Indjein L, Wangdi K, Stewart DE, Gray DJ. Epidemiology of soil-transmitted helminth infections in Semarang, Central Java, Indonesia. PLoS Negl Trop Dis 2020; 14:e0008907. [PMID: 33370267 PMCID: PMC7793285 DOI: 10.1371/journal.pntd.0008907] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 01/08/2021] [Accepted: 10/21/2020] [Indexed: 11/18/2022] Open
Abstract
Soil-transmitted helminth (STH) infections are endemic in Indonesia. However, prevalence data for many parts of the country are incomplete. The aim of this study was to determine human STH prevalence and knowledge and practices relating to STH risk behaviour, to provide a current view of the status of STH infection in rural communities in Central Java. A cross-sectional survey of 16 villages was conducted in Semarang, Central Java in 2015. Demographic and household data together with information about knowledge and practices relating to STH and hygiene were elicited through face-to-face interviews. Stool samples were collected and examined using the flotation method. Children (aged 2–12 years) also had their haemoglobin (Hb) levels, height and weight data collected, and BMI estimated. Data were analysed using univariate logistic regression analysis. A total of 6,466 individuals with a mean age of 33.5 years (range: 2–93) from 2,195 households were interviewed. The overall prevalence of STH was 33.8% with Ascaris lumbricoides (roundworm) the predominant nematode identified (prevalence = 26.0%). Hookworm and Trichuris trichiura (whipworm) were found in 7.9% and 1.8% of participants, respectively. Females were at increased odds of infection with A. lumbricoides (adjusted OR 1.14, 95% CI [1.02–1.29], p = 0.02). Adults in age groups 51–60 and over 60 years had the highest odds of being infected with hookworm (adjusted OR 3.01, 95% CI [1.84–4.91], p<0.001 and adjusted OR 3.79, 95% CI [2.30–6.26], p<0.001, respectively) compared to 6–12 year olds. Farmers also had higher odds of being infected with hookworm (adjusted OR 2.36, 95% CI [1.17–4.76], p = 0.02) compared to other occupation categories. Poverty (OR 2.14, 95% CI [1.77–2.58], p<0.001), overcrowding (OR 1.35, 95% CI [1.27–1.44], p<0.001), goat ownership (OR 1.61, 95% CI [1.10–2.41], p = 0.02) and the presence of dry floor space in the home (OR 0.73, 95% CI [0.58–0.91], p = 0.01) were all household factors significantly associated with an increased odds of infection. Infection with STH was not significantly associated with the gastrointestinal illness (p>0.05), BMI or Hb levels; however, one third of all 2–12 year olds surveyed were found to be anaemic (i.e. Hb concentrations below 110g/l or 115g/l for children under 5 and 5 years or older, respectively), with a greater proportion of school-age children at risk. Knowledge and behaviour related to hygiene and gastrointestinal diseases varied widely and were generally not associated with STH infection. The study revealed that STH infection remains endemic in Central Java despite ongoing deworming programs. Current control efforts would benefit from being re-evaluated to determine a more effective way forward. Among the major NTDs, STH are one of the most common disabling chronic infections. Currently available drug treatments, whilst considered safe and generally well tolerated, do not confer protection against new infections. In Indonesia, prevalences of STH of up to 90% have been reported but these estimates are based on data from the 1980s and 90s. More up-to-date STH prevalence estimates are urgently needed to help guide future control efforts. A cross-sectional survey was conducted in rural villages in Semarang, Central Java to determine human STH prevalence and associated risk factors. One-third of all cohort participants were positive for STH with prevalences of 26%, 7.9% and 1.8% identified for Ascaris lumbricoides, hookworm and Trichuris trichiura at 7.9% and 1.8%, respectively. Risk of A. lumbricoides infection was higher for females, whilst farmers and adults over 50 had an increased risk of hookworm infection. Poverty, overcrowding in the home and goat ownership were also associated with an increased risk at the household level. Soil-transmitted helminthiases remains a significant health problem in Central Java, Indonesia, exacerbated by limited knowledge about STH, poor sanitation and hygiene and poverty prevalent in the region. Control efforts would benefit from an integrated approach emphasising WASH, health education and chemotherapy. Further studies investigating environmental contamination with STH in and around homes in endemic areas could provide further insight into links between household factors and STH identified in our study.
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Affiliation(s)
- Johanna Kurscheid
- Department of Global Health, Research School of Population Health, Australian National University, Acton, Australia
- * E-mail:
| | - Budi Laksono
- Yayasan Wahana Bakti Sejatera Foundation (YWBS), Semarang, Indonesia
| | - M. J. Park
- Department of Nursing, College of Nursing, Konyang University, Daejeon, South Korea
| | | | - Ross Sadler
- School of Public Health, Griffith Health, Griffith University, South Brisbane, Australia
| | | | - Susana V. Nery
- Public Health Interventions Group, Kirby Institute, University of New South Wales, Kensington, Australia
| | | | - Kate Halton
- Institute for Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | | | - Alice Richardson
- Statistical Consulting Unit, Australian National University, Acton, Australia
| | - Léa Indjein
- School of Veterinary Science, University of Queensland, Gatton, Australia
| | - Kinley Wangdi
- Department of Global Health, Research School of Population Health, Australian National University, Acton, Australia
| | - Donald E. Stewart
- Department of Global Health, Research School of Population Health, Australian National University, Acton, Australia
- School of Medicine, Griffith Health, Griffith University, South Brisbane, Australia
| | - Darren J. Gray
- Department of Global Health, Research School of Population Health, Australian National University, Acton, Australia
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18
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Kladkempetch D, Tangtrongsup S, Tiwananthagorn S. Ancylostoma ceylanicum: The Neglected Zoonotic Parasite of Community Dogs in Thailand and Its Genetic Diversity among Asian Countries. Animals (Basel) 2020; 10:ani10112154. [PMID: 33228101 PMCID: PMC7699415 DOI: 10.3390/ani10112154] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/15/2020] [Accepted: 11/17/2020] [Indexed: 11/16/2022] Open
Abstract
Ancylostoma ceylanicum is a zoonotic helminth that is commonly found in domestic dogs and cats throughout Asia but is largely neglected in many countries. This study aimed to confirm the species of hookworm in dogs and soil environments and investigate the evolutionary analyses of A. ceylanicum among Thai and Asian populations. In a total of 299 dog fecal samples and 212 soil samples from 53 temples, the prevalence rates of hookworm infection by microscopic examination were 26.4% (79/299) and 10.4% (22/212) in dog and soil samples, respectively. A PCR-RFLP targeting the ITS region was then utilized to identify the hookworm species. In dogs, A. ceylanicum was the main hookworm species, and the rates of A. ceylanicum and A. caninum infections were 96.6% and 3.5%, respectively. The genetic characterization and diversity indices of the A. ceylanicumcox1 gene among Thai and Asian populations were evaluated. Nine haplotypes were identified from Thai A. ceylanicum, in which the haplotype diversity and the nucleotide diversity were 0.4436 and 0.0036, respectively. The highest nucleotide diversity of Chinese A. ceylanicum populations suggested that it could be the ancestor of the populations. Pairwise fixation indices indicated that Thai A. ceylanicum was closely related to the Malaysian population, suggesting a gene flow between these populations. The temples with hookworm-positive dogs were associated with the presence of hookworm-contaminated soil, as these levels showed an approximately four-fold increase compared with those in temples with hookworm-negative dogs (OR = 4.38, 95% CI: 1.55-12.37). Interestingly, the genotypes of A. ceylanicum in the contaminating soil and infecting dogs were identical. Therefore, increased awareness and concern from the wider public communities with regard to the responsibility of temples and municipal offices to provide proper deworming programs to community dogs should be strongly endorsed to reduce the risk of the transmission of this zoonotic disease. In addition, parasitic examination and treatment should be strongly implemented before dogs are imported and exported worldwide.
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Affiliation(s)
- Doolyawat Kladkempetch
- Master’s Degree Program in Veterinary Science, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand;
| | - Sahatchai Tangtrongsup
- Department of Companion Animal and Wildlife Clinic, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand;
- Research Center of Producing and Development of Products and Innovations for Animal Health and Production, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Saruda Tiwananthagorn
- Department of Veterinary Biosciences and Veterinary Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
- Excellent Center in Veterinary Bioscience, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai 50100, Thailand
- Correspondence: ; Tel.: +66-53-948-046 or +66-95-446-5955
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19
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Bradbury RS, Arguello I, Lane M, Cooley G, Handali S, Dimitrova SD, Nascimento FS, Jameson S, Hellmann K, Tharp M, Byers P, Montgomery SP, Haynie L, Kirmse B, Pilotte N, Williams SA, Hobbs CV. Parasitic Infection Surveillance in Mississippi Delta Children. Am J Trop Med Hyg 2020; 103:1150-1153. [PMID: 32588796 PMCID: PMC7470556 DOI: 10.4269/ajtmh.20-0026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Some recent studies suggest ongoing transmission of parasitic diseases in the American South; however, surveys in Mississippi children are lacking. We enrolled 166 children (median age 8 years, range 4-13 years) from the Mississippi Delta region and carried out multi-parallel real-time polymerase chain reaction (PCR) for Necator americanus, Ascaris lumbricoides, and Strongyloides stercoralis on their stool samples. Dried blood spots were obtained for multiplex serology antibody detection. Of 166 children, all reported having flushable toilets, 11% had soil exposure, and 34% had a pet dog or cat. None had prior diagnosis or treatment of parasitic disease. Multi-parallel real-time PCRs were negative on the 89 stool DNA extracts available for testing. Dried blood spot testing of all 166 children determined the seroprevalence of IgG antibodies to Toxocara spp. (3.6%), Cryptosporidium (2.4%), S. stercoralis, Fasciola hepatica, and Giardia duodenalis (all 0%). In conclusion, parasitic infections and exposure were scarce in this population. Larger studies of at-risk populations are needed.
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Affiliation(s)
- Richard S Bradbury
- School of Health and Life Sciences, Federation University, Berwick Campus, Melbourne, Australia.,Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Irene Arguello
- Department of Pediatrics, Division of Infectious Diseases, Children's of Mississippi, Jackson, Mississippi
| | - Meredith Lane
- Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Gretchen Cooley
- Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sukwan Handali
- Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Silvia D Dimitrova
- Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Fernanda S Nascimento
- Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sam Jameson
- Department of Pediatrics, Division of Infectious Diseases, Children's of Mississippi, Jackson, Mississippi
| | - Kathryn Hellmann
- Department of Pediatrics, Division of Infectious Diseases, Children's of Mississippi, Jackson, Mississippi
| | - Michelle Tharp
- The Delta Mercy Project, School of Nursing, University of Mississippi Medical Center, Jackson, Mississippi.,Division of Genetics, Department of Pediatrics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Paul Byers
- Mississippi State Department of Health, Jackson, Mississippi
| | - Susan P Montgomery
- Division of Parasitic Diseases and Malaria, Parasitic Diseases Branch, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Lisa Haynie
- The Delta Mercy Project, School of Nursing, University of Mississippi Medical Center, Jackson, Mississippi
| | - Brian Kirmse
- Division of Genetics, Department of Pediatrics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Nils Pilotte
- Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, Massachusetts.,Department of Biological Sciences, Smith College, Northampton, Massachusetts
| | - Steven A Williams
- Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, Massachusetts.,Department of Biological Sciences, Smith College, Northampton, Massachusetts
| | - Charlotte V Hobbs
- Department of Microbiology, University of Mississippi Medical Center, Jackson, Mississippi.,Department of Pediatrics, Division of Infectious Diseases, Children's of Mississippi, Jackson, Mississippi
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20
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Adisakwattana P, Yoonuan T, Phuphisut O, Poodeepiyasawat A, Homsuwan N, Gordon CA, McManus DP, Atkinson LE, Mousley A, Gobert GN. Clinical helminthiases in Thailand border regions show elevated prevalence levels using qPCR diagnostics combined with traditional microscopic methods. Parasit Vectors 2020; 13:416. [PMID: 32787935 PMCID: PMC7425172 DOI: 10.1186/s13071-020-04290-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 08/05/2020] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Under-regulated national borders in Southeast Asia represent potential regions for enhanced parasitic helminth transmission and present barriers to helminthiasis disease control. METHODS Three Thailand border regions close to Myanmar, Laos and Cambodia were surveyed for clinical parasitic helminth disease. In-field microscopy was performed on stools from 567 individuals. Sub-samples were transported to Bangkok for molecular analysis comprising three multiplex qPCR assays. RESULTS The overall helminth infection prevalence was 17.99% as assessed by Kato-Katz and 24.51% by qPCR. The combined prevalence of the two methods was 28.57%; the most predominant species detected were Opisthorchis viverrini (18.34%), hookworm (6.88%; Ancylostoma spp. and Necator americanus), Ascaris lumbricoides (2.29%) and Trichuris trichiura (1.76%). CONCLUSIONS These data demonstrate the value of molecular diagnostics for determining more precise prevalence levels of helminthiases in Southeast Asia. Availability of such accurate prevalence information will help guide future public health initiatives and highlights the need for more rigorous surveillance and timely intervention in these regions.
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Affiliation(s)
- Poom Adisakwattana
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand.
| | - Tippayarat Yoonuan
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Orawan Phuphisut
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Akkarin Poodeepiyasawat
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Nirundorn Homsuwan
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Catherine A Gordon
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, 4006, Australia
| | - Donald P McManus
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, 4006, Australia
| | - Louise E Atkinson
- School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Angela Mousley
- School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Geoffrey N Gobert
- School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK.
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21
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Aramendia AA, Anegagrie M, Zewdie D, Dacal E, Saugar JM, Herrador Z, Hailu T, Yimer M, Periago MV, Rodriguez E, Benito A. Epidemiology of intestinal helminthiases in a rural community of Ethiopia: Is it time to expand control programs to include Strongyloides stercoralis and the entire community? PLoS Negl Trop Dis 2020; 14:e0008315. [PMID: 32497042 PMCID: PMC7297378 DOI: 10.1371/journal.pntd.0008315] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/16/2020] [Accepted: 04/21/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Soil transmitted helminths are highly prevalent worldwide. Globally, approximately 1.5 billion people are infected with Ascaris lumbricoides, Trichuris trichiura or hookworm. Endemic countries carry out periodic mass treatment of at-risk populations with albendazole or mebendazole as a control measure. Most prevalence studies have focused on school aged children and therefore control programs are implemented at school level, not at community level. In this study, the prevalence of intestinal helminths, including Strongyloides stercoralis, was examined using a comprehensive laboratory approach in a community in north-western Ethiopia. METHODS A cross-sectional survey was conducted on 792 individuals ≥5 years old in randomly selected houses in a rural district. Stools were examined using three techniques: a formol-ether concentration, the Baermann technique and a real time polymerase chain reaction test (these last two specific for S. stercoralis). Statistical analyses were performed between two large age groups, children (≤14 years old) and adults (≥15 years old). RESULTS The prevalence of helminths was 91.3%; (95% CI: 89.3-93.3%). Hookworm was the most prevalent, 78.7% (95% CI 75.6-81.4%), followed by S. stercoralis 55.7% (95% CI 52.2-59.1%). Co-infection with both was detected in 45.4% (95% CI 42.0-49.0%) of the participants. The mean age of hookworm-infected individuals was significantly higher than non-infected ones (p = 0.003). Also, S. stercoralis infection was significantly associated with age, being more prevalent in adults (p = 0.002). CONCLUSIONS This is the highest prevalence of S. stercoralis detected in Ethiopia so far. Our results highlight the need of searching specifically for infection by this parasite since it usually goes unnoticed if helminth studies rely only on conventional diagnostic techniques, i.e. Kato-Katz. Moreover, the focus of these programs on children undermines the actual prevalence of hookworm. The adult population acts as a reservoir for both hookworm and S. stercoralis and this fact may negatively impact the current control programs in Ethiopia which only target treatment of school aged children. This reservoir, together with a lack of adequate water, sanitation and hygiene, increases the probability of re-infection in children. Finally, the high prevalence of S. stercoralis found calls for a comprehensive diagnostic approach in endemic areas in addition to a revision of control measures that is, adding ivermectin to current albendazole/mebendazole, since it is the drug of choice for S. stercoralis.
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Affiliation(s)
- Aranzazu Amor Aramendia
- Mundo Sano Foundation, Madrid, Spain
- National Center for Tropical Medicine, Institute of Health Carlos III, Madrid, Spain
- * E-mail:
| | - Melaku Anegagrie
- Mundo Sano Foundation, Madrid, Spain
- National Center for Tropical Medicine, Institute of Health Carlos III, Madrid, Spain
| | - Derjew Zewdie
- Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Science, Bahir Dar University, Bahir Dar, Ethiopia
| | - Elena Dacal
- Laboratory of Reference and Research on Parasitology, National Centre for Microbiology, Institute of Health Carlos III, Madrid, Spain
| | - Jose M. Saugar
- Laboratory of Reference and Research on Parasitology, National Centre for Microbiology, Institute of Health Carlos III, Madrid, Spain
| | - Zaida Herrador
- National Center for Tropical Medicine, Institute of Health Carlos III, Madrid, Spain
| | - Tadesse Hailu
- Laboratory of Reference and Research on Parasitology, National Centre for Microbiology, Institute of Health Carlos III, Madrid, Spain
| | - Mulat Yimer
- Laboratory of Reference and Research on Parasitology, National Centre for Microbiology, Institute of Health Carlos III, Madrid, Spain
| | - María V. Periago
- Mundo Sano Foundation, Argentina
- National Scientific and Technical Research Council (CONICET), Buenos Aires, Argentina
| | - Esperanza Rodriguez
- Laboratory of Reference and Research on Parasitology, National Centre for Microbiology, Institute of Health Carlos III, Madrid, Spain
| | - Agustín Benito
- National Center for Tropical Medicine, Institute of Health Carlos III, Madrid, Spain
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22
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Beknazarova M, Whiley H, Traub R, Ross K. Opportunistic Mapping of Strongyloides stercoralis and Hookworm in Dogs in Remote Australian Communities. Pathogens 2020; 9:E398. [PMID: 32455702 PMCID: PMC7281600 DOI: 10.3390/pathogens9050398] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/12/2020] [Accepted: 05/19/2020] [Indexed: 12/17/2022] Open
Abstract
Both Strongyloides stercoralis and hookworms are common soil-transmitted helminths in remote Australian communities. In addition to infecting humans, S. stercoralis and some species of hookworms infect canids and therefore present both environmental and zoonotic sources of transmission to humans. Currently, there is limited information available on the prevalence of hookworms and S. stercoralis infections in dogs living in communities across the Northern Territory in Australia. In this study, 274 dog faecal samples and 11 faecal samples of unknown origin were collected from the environment and directly from animals across 27 remote communities in Northern and Central Australia. Samples were examined using real-time polymerase chain reaction (PCR) analysis for the presence of S. stercoralis and four hookworm species: Ancylostoma caninum, Ancylostoma ceylanicum, Ancylostoma braziliense and Uncinaria stenocephala. The prevalence of S. stercoralis in dogs was found to be 21.9% (60/274). A. caninum was the only hookworm detected in the dog samples, with a prevalence of 31.4% (86/274). This study provides an insight into the prevalence of S. stercoralis and hookworms in dogs and informs future intervention and prevention strategies aimed at controlling these parasites in both dogs and humans. A "One Health" approach is crucial for the prevention of these diseases in Australia.
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Affiliation(s)
- Meruyert Beknazarova
- Faculty of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia; (H.W.); (K.R.)
| | - Harriet Whiley
- Faculty of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia; (H.W.); (K.R.)
| | - Rebecca Traub
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, VIC 3052, Australia;
| | - Kirstin Ross
- Faculty of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia; (H.W.); (K.R.)
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23
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Chou CM, Fan CK. Seroprevalence of Toxocara spp. infection in Southeast Asia and Taiwan. ADVANCES IN PARASITOLOGY 2020; 109:449-463. [PMID: 32381212 DOI: 10.1016/bs.apar.2020.01.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Human toxocariasis is a worldwide neglected zoonotic parasitic disease and caused mainly by Toxocara canis, and to a lesser event, by T. cati. There are only 16 epidemiological studies and 5 clinical toxocariasis case reports in 11 Southeast Asia countries and Taiwan (SEAT) that were found by searching data from PubMed in the period from January 1992 to August 2019. The overall seroprevalence in SEAT varied from 3.9% to 84.6% chiefly detected by using T. canis larval excretory-secretory antigen (TcES)-based ELISA. Playing with dogs or contacting Toxocara eggs from the contaminated soil or vegetables or eating raw meats/viscera containing encapsulated larvae seem likely the major risk factors leading to human toxocariasis in SEAT. Nevertheless, undertaking comprehensive seroepidemiological studies to establish the baseline data and beware of clinical toxocariasis cases by physicians as well as establishing adequate serodiagnostic methods in detection of Toxocara infection, e.g., TcES-based immunoblotting method in helminth endemic SEA are strongly required.
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Affiliation(s)
- Chia-Mei Chou
- Department of Molecular Parasitology and Tropical Diseases, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chia-Kwung Fan
- Department of Molecular Parasitology and Tropical Diseases, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Research Center of International Tropical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Tropical Medicine Division, International PhD Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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24
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Furtado LFV, Dias LTDO, Rodrigues TDO, Silva VJD, Oliveira VNGMD, Rabelo ÉML. Egg genotyping reveals the possibility of patent Ancylostoma caninum infection in human intestine. Sci Rep 2020; 10:3006. [PMID: 32080267 PMCID: PMC7033205 DOI: 10.1038/s41598-020-59874-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 02/05/2020] [Indexed: 12/14/2022] Open
Abstract
Hookworms are intestinal parasites that cause major public health problems, especially in developing countries. To differentiate eggs from different hookworm species, it is necessary to use molecular methodologies, since the eggs are morphologically similar. Here, we performed the molecular identification of single hookworm eggs from six Brazilian states. Of the 634 eggs individually analyzed, 98.1% (622/634) represented Necator americanus, and surprisingly, 1.9% (12/634 eggs from the same patient) represented Ancylostoma caninum. DNA analysis of the A. caninum-positive stool sample revealed no contamination with animal feces. This is the first report of the presence of A. caninum eggs in human feces, which may have a direct implication for the epidemiology of hookworm infection caused by this species. This suggests the need for special attention regarding prophylaxis, as different reservoirs, previously not described, may have great relevance for the spread of A. caninum.
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Affiliation(s)
- Luis Fernando Viana Furtado
- Universidade do Estado de Minas Gerais, Avenida Juca Stockler, 1130, CEP 37900-106, Nossa Sra. das Gracas, Passos, Minas Gerais, Brazil.
| | - Lucas Teixeira de Oliveira Dias
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Thais de Oliveira Rodrigues
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Vivian Jordania da Silva
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Valéria Nayara Gomes Mendes de Oliveira
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Élida Mara Leite Rabelo
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil.
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25
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Impact of the "BALatrine" Intervention on Soil-Transmitted Helminth Infections in Central Java, Indonesia: A Pilot Study. Trop Med Infect Dis 2019; 4:tropicalmed4040141. [PMID: 31817651 PMCID: PMC6958350 DOI: 10.3390/tropicalmed4040141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 11/28/2019] [Accepted: 12/04/2019] [Indexed: 11/23/2022] Open
Abstract
Many latrine campaigns in developing countries fail to be sustained because the introduced latrine is not appropriate to local socio-economic, cultural and environmental conditions, and there is an inadequate community health education component. We tested a low-cost, locally designed and constructed all-weather latrine (the “BALatrine”), together with community education promoting appropriate hygiene-related behaviour, to determine whether this integrated intervention effectively controlled soil-transmitted helminth (STH) infections. We undertook a pilot intervention study in two villages in Central Java, Indonesia. The villages were randomly allocated to either control or intervention with the intervention village receiving the BALatrine program and the control village receiving no program. STH-infection status was measured using the faecal flotation diagnostic method, before and eight months after the intervention. Over 8 months, the cumulative incidence of STH infection was significantly lower in the intervention village than in the control village: 13.4% vs. 27.5% (67/244 vs. 38/283, p < 0.001). The intervention was particularly effective among children: cumulative incidence 3.8% (2/53) for the intervention vs. 24.1% (13/54) for the control village (p < 0.001). The integrated BALatrine intervention was associated with a reduced incidence of STH infection. Following on from this pilot study, a large cluster-randomised controlled trial was commenced (ACTRN12613000523707).
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26
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Ruberanziza E, Owada K, Clark NJ, Umulisa I, Ortu G, Lancaster W, Munyaneza T, Mbituyumuremyi A, Bayisenge U, Fenwick A, Soares Magalhães RJ. Mapping Soil-Transmitted Helminth Parasite Infection in Rwanda: Estimating Endemicity and Identifying At-Risk Populations. Trop Med Infect Dis 2019; 4:tropicalmed4020093. [PMID: 31207897 PMCID: PMC6630518 DOI: 10.3390/tropicalmed4020093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 01/17/2023] Open
Abstract
Soil-transmitted helminth (STH) infections are globally distributed intestinal parasite infections caused by Ascaris lumbricoides, Trichuris trichiura, and hookworms (Ancylostoma duodenale and Necator americanus). STH infection constitutes a major public health threat, with heavy burdens observed in many of the world’s tropical and subtropical regions. Mass drug administration and sanitation improvements can drastically reduce STH prevalence and associated morbidity. However, identifying targeted areas in need of treatment is hampered by a lack of knowledge on geographical and population-level risk factors. In this study, we applied Bayesian geostatistical modelling to data from a national school-based STH infection survey in Rwanda to (1) identify ecological and population-level risk factors and (2) provide comprehensive precision maps of infection burdens. Our results indicated that STH infections were heterogeneously distributed across the country and showed signatures of spatial clustering, though the magnitude of clustering varied among parasites. The highest rates of endemic clustering were attributed to A. lumbricoides infection. Concordant infection patterns among the three parasite groups highlighted populations currently most at-risk of morbidity. Population-dense areas in the Western and North-Western regions of Rwanda represent areas that have continued to exhibit high STH burden across two surveys and are likely in need of targeted interventions. Our maps support the need for an updated evaluation of STH endemicity in western Rwanda to evaluate progress in MDA efforts and identify communities that need further local interventions to further reduce morbidity caused by STH infections.
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Affiliation(s)
- Eugene Ruberanziza
- Neglected Tropical Diseases and Other Parasitic Diseases Unit, Malaria and Other Parasitic Diseases Division, Rwanda Biomedical Center, Ministry of Health, Kigali, Rwanda.
| | - Kei Owada
- UQ Spatial Epidemiology Laboratory, School of Veterinary Science, the University of Queensland, Gatton 4343, Queensland, Australia.
- Children Health and Environment Program, Child Health Research Centre, The University of Queensland, South Brisbane 4101, Queensland, Australia.
| | - Nicholas J Clark
- UQ Spatial Epidemiology Laboratory, School of Veterinary Science, the University of Queensland, Gatton 4343, Queensland, Australia.
- Children Health and Environment Program, Child Health Research Centre, The University of Queensland, South Brisbane 4101, Queensland, Australia.
| | - Irenee Umulisa
- Neglected Tropical Diseases and Other Parasitic Diseases Unit, Malaria and Other Parasitic Diseases Division, Rwanda Biomedical Center, Ministry of Health, Kigali, Rwanda.
| | - Giuseppina Ortu
- Schistosomiasis Control Initiative (SCI), Department of Infectious Diseases Epidemiology, Imperial College, London SW7 2AZ, UK.
| | | | - Tharcisse Munyaneza
- Microbiology Unit, National Reference Laboratory (NRL) Division, Rwanda Biomedical Center, Ministry of Health, Kigali, Rwanda.
| | - Aimable Mbituyumuremyi
- Malaria and Other Parasitic Diseases Division, Rwanda Biomedical Center, Ministry of Health, Kigali, Rwanda.
| | - Ursin Bayisenge
- Neglected Tropical Diseases and Other Parasitic Diseases Unit, Malaria and Other Parasitic Diseases Division, Rwanda Biomedical Center, Ministry of Health, Kigali, Rwanda.
| | - Alan Fenwick
- Schistosomiasis Control Initiative (SCI), Department of Infectious Diseases Epidemiology, Imperial College, London SW7 2AZ, UK.
| | - Ricardo J Soares Magalhães
- UQ Spatial Epidemiology Laboratory, School of Veterinary Science, the University of Queensland, Gatton 4343, Queensland, Australia.
- Children Health and Environment Program, Child Health Research Centre, The University of Queensland, South Brisbane 4101, Queensland, Australia.
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27
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Zoonotic Helminth Diseases in Dogs and Dingoes Utilising Shared Resources in an Australian Aboriginal Community. Trop Med Infect Dis 2018; 3:tropicalmed3040110. [PMID: 30297603 PMCID: PMC6306763 DOI: 10.3390/tropicalmed3040110] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/03/2018] [Accepted: 10/04/2018] [Indexed: 02/04/2023] Open
Abstract
The impacts of free-roaming canids (domestic and wild) on public health have long been a concern in Australian Indigenous communities. We investigated the prevalence of zoonotic helminth diseases in dogs and sympatric dingoes, and used radio telemetry to measure their spatial overlap, in an Aboriginal community in the Wet Tropics of Australia. Samples collected from dingoes and dogs showed high levels of infection with the zoonotic hookworm, Ancylostoma caninum. Dingoes were also positive for A. ceylanicum infection (11.4%), but dogs were infection free. Whipworm, Trichuris vulpis, infection was far more prevalent in necropsies of domestic dogs (78.6%) than dingoes (3.7%). Dogs were free from Dirofilaria immitis infection, while dingoes recorded 46.2% infection. Eleven dingoes and seven free-roaming domestic dogs were fitted with Global Positioning System collars and tracked over an extended period. Dingo home-ranges almost completely overlapped those of the domestic dogs. However, dingoes and dogs did not utilise the same area at the same time, and dogs may have avoided dingoes. This spatial overlap in resource use presents an opportunity for the indirect spill-over and spill-back of parasites between dogs and dingoes. Tracking and camera traps showed that the community rubbish tip and animal carcasses were areas of concentrated activity for dogs and dingoes.
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28
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Kurscheid J, Bendrups D, Susilo J, Williams C, Amaral S, Laksono B, Stewart DE, Gray DJ. Shadow Puppets and Neglected Diseases: Evaluating a Health Promotion Performance in Rural Indonesia. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E2050. [PMID: 30235817 PMCID: PMC6164465 DOI: 10.3390/ijerph15092050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/05/2018] [Accepted: 09/06/2018] [Indexed: 12/25/2022]
Abstract
'Rama and the Worm' is a shadow puppet production targeting neglected diseases in Central Java. It is an entertainment-based intervention study to promote health by reducing the impact of parasitic diseases such as soil-transmitted helminths (STH). The study uses traditional Javanese shadow puppetry (wayang kulit) as a vehicle in village communities to disseminate health messages and promote behaviour change to prevent diseases caused, primarily, by inadequate sanitation and poor hygiene. The health education messages contained in the play, although using traditional characters and themes, required the creation of a completely new narrative script, using characters and plot lines familiar to the wayang kulit repertoire, but placing them in new situations that relate specifically to health promotion objectives. The intervention was piloted in a village in Central Java, Indonesia using a pre/post design with both qualitative and quantitative analysis. A total of 96 male and female villagers, aged between 7 and 87 years, provided both baseline and follow up data. Participant knowledge and behaviours related to gastrointestinal and helminth-related disease were assessed before and after the intervention through a questionnaire administered by interview. Results revealed statistically significant improvements in both knowledge (48.6% pre-intervention score vs. 62.8% post-intervention score, p < 0.001) and behaviour (77.4% vs. 80.6%, p = 0.004) related to gastrointestinal and helminth disease. Findings of the study indicate the wayang kulit performance is an effective health education tool. The results provide proof of concept with scaling up the next step forward. The wayang kulit production provides a significant additional component for an integrated, comprehensive approach to reduction and elimination of STH infection.
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Affiliation(s)
- Johanna Kurscheid
- Department of Global Health, Research School of Population Health, Australian National University, Canberra, ACT 2601, Australia.
| | - Dan Bendrups
- Graduate Research School, La Trobe University, Melbourne, VIC 3083, Australia.
| | - Joko Susilo
- Music Department, Theatre and Performing Arts, Otago University, Dunedin 9016, New Zealand.
| | - Courtney Williams
- Queensland Conservatorium Research Centre, Griffith University, South Brisbane, QLD 4101, Australia.
| | - Salvador Amaral
- Department of Global Health, Research School of Population Health, Australian National University, Canberra, ACT 2601, Australia.
| | - Budi Laksono
- Yayasan Wahana Bakti Sejatera Foundation (YWBS), Semarang 50183, Indonesia.
| | - Donald E Stewart
- Queensland Conservatorium Research Centre, Griffith University, South Brisbane, QLD 4101, Australia.
- School of Medicine, Griffith Health, Griffith University, South Brisbane, QLD 4101, Australia.
| | - Darren J Gray
- Department of Global Health, Research School of Population Health, Australian National University, Canberra, ACT 2601, Australia.
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Leggat PA, Graves P, Laha T, Aye KS. Neglected and Emerging Tropical Diseases in South and Southeast Asia and Northern Australia. Trop Med Infect Dis 2018; 3:E70. [PMID: 30274466 PMCID: PMC6160933 DOI: 10.3390/tropicalmed3030070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 11/17/2022] Open
Affiliation(s)
- Peter A Leggat
- World Health Organization Collaborating Centre for Vectorborne and Neglected Tropical Diseases, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, QLD 4811, Australia.
- Faculty of Science, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia.
| | - Patricia Graves
- World Health Organization Collaborating Centre for Vectorborne and Neglected Tropical Diseases, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, QLD 4811, Australia.
| | - Thewarach Laha
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.
| | - Khin Saw Aye
- Department of Medical Research, Ministry of Health and Sports, Yangon 11191, Myanmar.
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Beknazarova M, Whiley H, Judd JA, Shield J, Page W, Miller A, Whittaker M, Ross K. Argument for Inclusion of Strongyloidiasis in the Australian National Notifiable Disease List. Trop Med Infect Dis 2018; 3:E61. [PMID: 30274457 PMCID: PMC6073110 DOI: 10.3390/tropicalmed3020061] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 05/23/2018] [Accepted: 05/31/2018] [Indexed: 11/25/2022] Open
Abstract
Strongyloidiasis is an infection caused by the helminth, Strongyloides stercoralis. Up to 370 million people are infected with the parasite globally, and it has remained endemic in the Indigenous Australian population for many decades. Strongyloidiasis has been also reported in other Australian populations. Ignorance of this disease has caused unnecessary costs to the government health system, and been detrimental to the Australian people's health. This manuscript addresses the 12 criteria required for a disease to be included in the Australian National Notifiable Disease List (NNDL) under the National Health Security Act 2007 (Commonwealth). There are six main arguments that provide compelling justification for strongyloidiasis to be made nationally notifiable and added to the Australian NNDL. These are: The disease is important to Indigenous health, and closing the health inequity gap between Indigenous and non-Indigenous Australians is a priority; a public health response is required to detect cases of strongyloidiasis and to establish the true incidence and prevalence of the disease; there is no alternative national surveillance system to gather data on the disease; there are preventive measures with high efficacy and low side effects; data collection is feasible as cases are definable by microscopy, PCR, or serological diagnostics; and achievement of the Sustainable Development Goal (SDG) # 6 on clean water and sanitation.
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Affiliation(s)
- Meruyert Beknazarova
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia.
| | - Harriet Whiley
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia.
| | - Jenni A Judd
- School of Health Medical and Applied Sciences, Centre of Indigenous Health Equity Research, Central Queensland University, Bundaberg, QLD 4670, Australia.
| | - Jennifer Shield
- Department of Pharmacy and Applied Science, La Trobe University, Bendigo, VIC 3552, Australia.
| | - Wendy Page
- Miwatj Health Aboriginal Corporation, Nhulunbuy, NT 0881, Australia.
- Public Health and Tropical Medicine, James Cook University, Cairns, QLD 4870, Australia.
| | - Adrian Miller
- Indigenous Research Unit, Griffith University, Nathan, QLD 4111, Australia.
| | - Maxine Whittaker
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, QLD 4811, Australia.
| | - Kirstin Ross
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia.
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Yoshikawa M, Ouji Y, Hirai N, Nakamura-Uchiyama F, Yamada M, Arizono N, Akamatsu N, Yoh T, Kaya D, Nakatani T, Kikuchi E, Katanami Y, Satoh K, Maki R, Miyazato Y, Oba Y, Kasahara K, Mikasa K. Ancylostoma ceylanicum, novel etiological agent for traveler's diarrhea-report of four Japanese patients who returned from Southeast Asia and Papua New Guinea. Trop Med Health 2018; 46:6. [PMID: 29563849 PMCID: PMC5848582 DOI: 10.1186/s41182-018-0087-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/07/2018] [Indexed: 11/10/2022] Open
Abstract
Background Countries in the Southeast Asia region have a high prevalence of soil-transmitted helminth, such as roundworm, whipworm, and hookworms [Ancylostoma duodenale, Necator americanus, Ancylostoma ceylanicum]. Recent molecular-based surveys have revealed that A. ceylanicum, a zoonotic hookworm, is likely the second most prevalent hookworm species infecting humans in that part of the world, while others have noted that this infection is an emerging public health risk not only for indigenous people but also for visitors from other countries. Case presentation We recently encountered four cases of A. ceylanicum infection in Japanese individuals who returned from Southeast Asia and Papua New Guinea. Case 1 was a 25-year-old male who stayed in a rainforest in Malaysia for 4 weeks, where he developed abdominal pain and diarrhea in the third week. Eleven adult worms (five males, six females) were expelled after treatment with pyrantel pamoate and identified as A. ceylanicum based on morphological characteristics and DNA sequences of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene. Case 2 was a 26-year-old male who spent 2 years as an overseas cooperation volunteer for agriculture in Papua New Guinea. He did not note any symptoms at that time, though eggs were detected in feces samples at a medical check-up examination after returning. Although collection of adult worms was unsuccessful, DNA analysis of the eggs for cox1 and the ribosomal internal transcribed spacer (ITS)-1 and ITS-2 genes demonstrated that they were A. ceylanicum. Case 3 was a 47-year-old male who spent 1 month in a rural village in Lao People's Democratic Republic and began suffering from watery diarrhea from the third week. A total of nine adult worms (three males, six females) were collected by endoscopic procedures and following treatment with pyrantel pamoate. Morphological examination and molecular analyses of the cox1 gene showed that they were A. ceylanicum. Case 4 was a 27-year-old male who participated in group travel to India for 5 days. Three weeks after returning, he developed abdominal pain and diarrhea. Hookworm eggs were found in feces samples and developed into larvae in culture, which were identified as A. ceylanicum based on molecular analysis of the cox1 gene. Eosinophilia was observed in all of the cases prior to treatment. Conclusions A. ceylanicum should be recognized as an important etiologic pathogen of hookworm diseases in travelers to countries in the Southeast Asia and West Pacific Ocean regions.
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Affiliation(s)
- Masahide Yoshikawa
- 1Department of Pathogen, Infection and Immunity, Nara Medical University, Shijo-cho, Kashihara, Nara, 634-8521 Japan
| | - Yukiteru Ouji
- 1Department of Pathogen, Infection and Immunity, Nara Medical University, Shijo-cho, Kashihara, Nara, 634-8521 Japan
| | - Nobuyasu Hirai
- 1Department of Pathogen, Infection and Immunity, Nara Medical University, Shijo-cho, Kashihara, Nara, 634-8521 Japan.,2Center for Infectious Diseases, Nara Medical University, Shijo-cho, Kashihara, Nara, Japan
| | - Fukumi Nakamura-Uchiyama
- 1Department of Pathogen, Infection and Immunity, Nara Medical University, Shijo-cho, Kashihara, Nara, 634-8521 Japan.,2Center for Infectious Diseases, Nara Medical University, Shijo-cho, Kashihara, Nara, Japan
| | - Minoru Yamada
- 3Department of Infectious Diseases, Kyoto Prefectural University of Medicine, Kyoto, 612-8369 Japan
| | - Naoki Arizono
- 3Department of Infectious Diseases, Kyoto Prefectural University of Medicine, Kyoto, 612-8369 Japan
| | - Naoaki Akamatsu
- Department of Gastroenterology, Omihachiman Community Medical Center, Omihachiman, Japan
| | - Takaharu Yoh
- Department of Gastroenterology, Omihachiman Community Medical Center, Omihachiman, Japan
| | - Daisuke Kaya
- Department of Gastroenterology, Nara Prefectural General Medical Center, Nara, Japan
| | - Toshiya Nakatani
- Department of Gastroenterology, Nara Prefectural General Medical Center, Nara, Japan
| | - Eiryo Kikuchi
- Department of Gastroenterology, Nara Prefectural General Medical Center, Nara, Japan
| | - Yuichi Katanami
- 6Department of Infectious Diseases, Nara City Hospital, Nara, Japan
| | - Kimitoshi Satoh
- 6Department of Infectious Diseases, Nara City Hospital, Nara, Japan
| | - Ryosuke Maki
- Department of Infectious Diseases, Osaka General Medical Center, Osaka, Japan
| | - Yusuke Miyazato
- Department of Infectious Diseases, Osaka General Medical Center, Osaka, Japan
| | - Yuichiro Oba
- Department of Infectious Diseases, Osaka General Medical Center, Osaka, Japan
| | - Kei Kasahara
- 2Center for Infectious Diseases, Nara Medical University, Shijo-cho, Kashihara, Nara, Japan
| | - Keiichi Mikasa
- 2Center for Infectious Diseases, Nara Medical University, Shijo-cho, Kashihara, Nara, Japan
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32
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Reda AA. Probiotics for the Control of Helminth Zoonosis. J Vet Med 2018; 2018:4178986. [PMID: 29666821 PMCID: PMC5831688 DOI: 10.1155/2018/4178986] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 12/27/2017] [Indexed: 12/12/2022] Open
Abstract
This paper is a comprehensive, concise, and an up to date review about probiotics effect and mechanisms against helminth infections of zoonotic importance. Zoonoses are diseases that can be transmitted from animals to humans in a reversible way. Despite zoonotic helminth diseases being still a challenge to the public health and the agriculture industries globally, they were still neglected in both human and veterinary medicine. Moreover, the increasing emergence of anthelmintic drug resistance constitutes failures of most disease control strategies, alarming for a quest to new alternative control approaches. Consequently, the use of beneficial microorganisms, probiotics, is becoming interesting for its prophylactic or therapeutic application against several diseases including helminths. Recent studies on probiotics against parasites and the interactions between bacteria, parasites, and the immune system in the gut draw much attention. However, the effects of these beneficial microorganisms in helminth infections remain largely unexplored. Therefore, the aim of the present review is to raise attention and to summarize recent findings on probiotics research against helminth parasites of zoonotic significance. State-of-the-art research on beneficial effects of bacteria on helminth infections and their proposed mechanisms of action is thoroughly discussed.
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Affiliation(s)
- Abadi Amare Reda
- School of Veterinary Medicine, Wollo University, P.O. Box 1145, Dessie, Ethiopia
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33
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Gillespie S, Bradbury RS. A Survey of Intestinal Parasites of Domestic Dogs in Central Queensland. Trop Med Infect Dis 2017; 2:E60. [PMID: 30270917 PMCID: PMC6082058 DOI: 10.3390/tropicalmed2040060] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 11/13/2017] [Accepted: 11/17/2017] [Indexed: 11/18/2022] Open
Abstract
Australia has a very high rate of dog ownership, which in some circumstances may lead to exposure to zoonotic parasitic diseases from those companion animals. Domestic dog faecal samples (n = 300) were collected from public spaces and private property in the greater Rockhampton (Central Queensland) region and tested for intestinal helminths and protozoa by direct microscopy, two flotation methods and a modified acid-fast stain for cryptosporidia. Intestinal parasites detected included hookworms (25%), Cystoisospora ohioensis complex (9%), Blastocystis hominis (3%), Giardia duodenalis (3%), Spirometra erinacei (1%) and Toxocara canis (1%), Sarcocystis spp. (2%), Cryptosporidium spp. (2%) and Cystoisospora canis (1%). One infection each with Trichuris vulpis, Dipylidium caninum and a protozoa belonging to the Entamoeba histolytica complex were identified. Sheather's sucrose centrifugal flotation was more sensitive than saturated salt passive flotation, but no single test detected all cases of parasitic infection identified. The test methodologies employed are poor at recovering larva of Strongyloides stercoralis, Aleurostrongylus abstrussis and eggs of cestodes such as Echinococcus granulosis, so the potential presence of these parasites in Central Queensland domestic dogs cannot be excluded by this survey alone.
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Affiliation(s)
- Simone Gillespie
- School of Health, Medical and Applied Sciences, Central Queensland University, North Rockhampton, QSD 4702, Australia.
| | - Richard S Bradbury
- School of Health, Medical and Applied Sciences, Central Queensland University, North Rockhampton, QSD 4702, Australia.
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