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Janis C Weeks, William M Roberts, Kristin J Robinson, Melissa Keaney, Jon J Vermeire, Joseph F Urban, Shawn R Lockery, John M Hawdon
The screening of candidate compounds and natural products for anthelmintic activity is important for discovering new drugs against human and animal parasites. We previously validated in Caenorhabditis elegans a microfluidic device ('chip') that records non-invasively the tiny electrophysiological signals generated by rhythmic contraction (pumping) of the worm's pharynx. These electropharyngeograms (EPGs) are recorded simultaneously from multiple worms per chip, providing a medium-throughput readout of muscular and neural activity that is especially useful for compounds targeting neurotransmitter receptors and ion channels...
September 15, 2016: International Journal for Parasitology, Drugs and Drug Resistance
Jacques-Robert Christen, Marie Mura, Gwenaëlle Roudaut, Anne-Sophie Drogoul, Magalie Demar, Sébastien Briolant, Eric Garnotel, Fabrice Simon, Vincent Pommier De Santi
Two cross-sectional studies were performed 2 years apart in French military personnel deployed from France to French Guiana. In 2011, military medical centres in French Guiana reported 40 cases of intestinal parasitism in service members returning from illegal gold mining sites in the rainforest. In 2013, 48 out of 132 service members returning from French Guiana after a 4-month mission had eosinophilia and seven were infected with hookworm. A presumptive first-line treatment with albendazole could be the most pragmatic strategy...
July 2016: Journal of Travel Medicine
Samuel Fuhrimann, Mirko S Winkler, Phuc Pham-Duc, Dung Do-Trung, Christian Schindler, Jürg Utzinger, Guéladio Cissé
BACKGROUND: Infections with intestinal parasites (helminths and intestinal protozoa) are endemic in Southeast Asia and inappropriate management and reuse of wastewater might exacerbate the risk of human infections. In rapidly growing urban settings, little is known about the extent of intestinal parasite infections. We assessed the point-prevalence and risk factors of intestinal parasite infections in population groups differently exposed to wastewater in urban and peri-urban transition zones in Hanoi, the capital of Vietnam...
October 10, 2016: Parasites & Vectors
Allen G P Ross, Remigio M Olveda, Donald P McManus, Donald A Harn, Delia Chy, Yuesheng Li, Veronica Tallo, Shu-Kay Ng
BACKGROUND: A cross-sectional survey was performed in 2012 among 18 rural barangays in Northern Samar, the Philippines in order to determine the prevalence of single and multiple species helminth infections and the underlying risk factors of acquiring one or more parasites. METHODS: A total of 6976 participants who completed a medical questionnaire and provided a stool sample for examination were included in the final analysis. RESULTS: The overall prevalence rates of Schistosoma japonicum, Ascaris lumbricoides, Trichuris trichiura, and hookworm were found to be moderate to high at 28...
October 4, 2016: International Journal of Infectious Diseases: IJID
Adane Derso, Endalkachew Nibret, Abaineh Munshea
BACKGROUND: Parasitic infections affect tens of millions of pregnant women worldwide, and directly or indirectly lead to a spectrum of adverse maternal and fetal/placental effects. The objective of this study was to assess the prevalence of intestinal parasite infections and associated risk factors among pregnant women attending antenatal care center in Felege Hiwot Referral Hospital, Bahir Dar city, northwest Ethiopia. METHODS: A cross-sectional hospital based study was conducted from November 2013 to January 2014 among 384 pregnant women...
September 30, 2016: BMC Infectious Diseases
M Bagayan, D Zongo, A Oueda, H Sorgho, B Savadogo, F Drabo, A Ouedraogo, J N Poda, B G Kabre, Y Zhang
To determine the current status of schistosomiasis and soil-transmitted helminth (STH) infections among schoolchildren after 10 years of mass treatment with praziquantel. Parasitological surveys were conducted in 2013 in 22 primary schools located in 11 regions of Burkina Faso. Urine filtration methods and Kato-Katz techniques for stool were used to detect the eggs of Schistosoma hæmatobium, Schistosoma mansoni, and STH. 3514 schoolchildren aged from 7 to 11 (1.415 ± 9) years participated in the study. The prevalence of S...
August 1, 2016: Médecine et Santé Tropicales
Stefano Veraldi, Luisa Angileri, Bethsabeth Abigail Parducci, Gianluca Nazzaro
No abstract text is available yet for this article.
August 10, 2016: Journal of Dermatological Treatment
Brandi T Wren, Melissa J Remis, Joseph W Camp, Thomas R Gillespie
There are many known benefits of social grooming among primates, including maintenance of social relationships, removal of ectoparasites, and improved physiological condition. Recently, however, researchers have noted that social grooming and social contact may also present a significant cost by facilitating transmission of some parasites and pathogens. We investigated whether the number of social grooming partners varied based on infection status for gastrointestinal parasites. We used focal animal sampling and continuous recording to collect data on the number of grooming partners for known individual vervet monkeys (Chlorocebus aethiops)...
September 29, 2016: Folia Primatologica; International Journal of Primatology
Junfei Wei, Ashish Damania, Xin Gao, Zhuyun Liu, Rojelio Mejia, Makedonka Mitreva, Ulrich Strych, Maria Elena Bottazzi, Peter J Hotez, Bin Zhan
BACKGROUND: The intestine of hookworms contains enzymes and proteins involved in the blood-feeding process of the parasite and is therefore a promising source of possible vaccine antigens. One such antigen, the hemoglobin-digesting intestinal aspartic protease known as Na-APR-1 from the human hookworm Necator americanus, is currently a lead candidate antigen in clinical trials, as is Na-GST-1 a heme-detoxifying glutathione S-transferase. METHODS: In order to discover additional hookworm vaccine antigens, messenger RNA was obtained from the intestine of male hookworms, Ancylostoma ceylanicum, maintained in hamsters...
September 27, 2016: Parasites & Vectors
Giuseppina Ortu, Mohamad Assoum, Udo Wittmann, Sarah Knowles, Michelle Clements, Onésime Ndayishimiye, Maria-Gloria Basáñez, Colleen Lau, Archie Clements, Alan Fenwick, Ricardo J Soares Magalhaes
BACKGROUND: Soil-transmitted helminth (STH) infections are amongst the most prevalent infections in the world. Mass drug administration (MDA) programmes have become the most commonly used national interventions for endemic countries to achieve elimination. This paper aims to describe the effect of an 8-year MDA programme on the prevalence, intensity of infection and co-infection of STH in Burundi from 2007 to 2014 and critically appraise the trajectory towards STH elimination in the country...
2016: Parasites & Vectors
Rick Speare, Richard Stewart Bradbury, John Croese
A 26-year-old male member of the Australian Defense Force presented with a history of central abdominal pain of 4 weeks duration and peripheral eosinophilia consistent with eosinophilic enteritis. Acute hookworm disease was diagnosed as the cause. Adult worms recovered from feces after therapy with albendazole were morphologically consistent with Ancylostoma ceylanicum. As the patient had been deployed with the Regional Assistance Mission to Solomon Islands for 6 months prior to this presentation, it is very likely that the A...
August 2016: Korean Journal of Parasitology
Bui Khac Hung, Nguyen Van De, Le Van Duyet, Jong-Yil Chai
To know the infection status of helminths in primary schoolchildren of southern parts of Vietnam, we performed an epidemiological study in Krong Pac district, Dak Lak Province, Vietnam. A total of 1,206 stool specimens were collected from ethnic Ede schoolchildren in 4 primary schools in 2015 and examined by the Kato-Katz technique. In addition, stool cultures were done by the Harada-Mori method to obtain hookworm larvae and then to clarify the species of hookworms infected. The results showed that the helminth infection rate was 25...
August 2016: Korean Journal of Parasitology
Pelagie M Boko, Moudachirou Ibikounle, Ablawa Onzo-Aboki, Jean-Jacques Tougoue, Yollande Sissinto, Wilfrid Batcho, Dorothe Kinde-Gazard, Achille Kabore
In 2013, Benin developed strategies to control neglected tropical diseases and one of the first step was the disease mapping of the entire country in order to identify endemic districts of schistosomiasis and soil transmitted helminths (STH). This study was carried out in 30 of the 77 districts of Benin. Of these 30 districts 22 were previously treated for Lymphatic Filariasis (LF) using the Ivermectin and Albendazole combination. In each district, five schools were selected and 50 children aged 8 to 14 years were sampled in each school, making a total of 250 children sampled in the district...
2016: PloS One
Jacinta Wairimu Macharia, Zipporah W Ng'ang'a, Sammy Michugu Njenga
INTRODUCTION: helminthic infections caused by soil-transmitted helminths (STH) and schistosomes are among the most prevalent afflictions of humans who live in areas of poverty. An operational research was undertaken in 5 villages of Kwale County during a pilot control programme which included both the adults and school going children. Willingness of community members to participate in the treatment as well as in the research is critical. A cross sectional study sought to determine factors influencing community participation in control and related operational research and assess the treatment coverage for urogenital schistosomiasis and hookworms in rural villages of Kwale County...
2016: Pan African Medical Journal
Subhamay Panda, Santamay Panda, Leena Kumari
Parasitic worm infection of humans is one of the most commonly prevalent helminth infection that has imposed great impact on society and public health in the developing world. The two species of hookworm, namely Ancylostoma duodenale and Necator americanus may be primarily responsible for causing parasitic infections in human beings. The highly prevalent areas for Ancylostoma duodenale infections are mainly India, Middle East, Australia, northern Africa and other parts of the world. The serum arylesterases/paraoxonases are family of enzymes that is involved in the hydrolysis of a number of organophosphorus insecticides to the nontoxic products...
July 2016: International Journal of Pharma and Bio Sciences
C Muñoz-Antoli, A Pavón, P Pérez, R Toledo, J G Esteban
Soil-transmitted helminth (STH) prevalence, intensity, polyparasitism and co-infections in 425 children from 3 schools of Laguna de Perlas (Nicaragua) were investigated. Single stool samples were analysed by the formalin-ether method and the Kato-Katz. A total of 402 (94.6%) children were infected. Trichuris trichiura 308 (72.4%), Ascaris lumbricoides 115 (27.1%) and Hookworms 54 (12.7%) were the most prevalent STHs. Polyparasitism (322; 75.8%) with two species was most prevalent (109; 25.6%). T. trichiura with A...
September 10, 2016: Journal of Tropical Pediatrics
Gunnar Boman
Albert Calmette (1863-1933) was a well-known French physician and bacteriologist. He started his career as a naval medical officer and participated in several expeditions to the French colonies, including Saint-Pierre et Miquelon and Gabon. In 1891 he founded the Pasteur Institute in Saigon in French Indo-China, which is now Ho Chi Minh City in Vietnam, and became its first head. He returned to France in 1894 and was asked to found another Pasteur Institute in Lille in Northern France, where he worked as its manager from 1896 to 1919...
September 9, 2016: Acta Paediatrica
Sarah M Bartsch, Peter J Hotez, Lindsey Asti, Kristina M Zapf, Maria Elena Bottazzi, David J Diemert, Bruce Y Lee
BACKGROUND: Even though human hookworm infection is highly endemic in many countries throughout the world, its global economic and health impact is not well known. Without a better understanding of hookworm's economic burden worldwide, it is difficult for decision makers such as funders, policy makers, disease control officials, and intervention manufacturers to determine how much time, energy, and resources to invest in hookworm control. METHODOLOGY/PRINCIPLE FINDINGS: We developed a computational simulation model to estimate the economic and health burden of hookworm infection in every country, WHO region, and globally, in 2016 from the societal perspective...
September 2016: PLoS Neglected Tropical Diseases
Joseph O Mugisha, Janet Seeley, Hannah Kuper
BACKGROUND: Haematology reference values are needed to interpret haematology results and make clinical decisions, but these have not been established for old people in sub-Saharan Africa. The objective of this study was to establish haematology reference values for people aged 50 years and above in Uganda, to compare the haematology reference values for those aged 65 years and over with those less than 65 years and to compare these haematology reference values with established haematology reference values for old people from high income countries...
2016: BMC Research Notes
Jean T Coulibaly, Mamadou Ouattara, Sören L Becker, Nathan C Lo, Jennifer Keiser, Eliézer K N'Goran, Davide Ianniello, Laura Rinaldi, Giuseppe Cringoli, Jürg Utzinger
Accurate diagnostic tools for human helminthiasis are crucial for epidemiological surveys, improved patient management, and evaluation of community-based intervention studies. However, the diagnosis of intestinal schistosomiasis and soil-transmitted helminthiasis heavily relies on stool microscopy using the Kato-Katz technique, which has a low sensitivity. The Mini-FLOTAC method is an alternative microscopy-based technique, but its diagnostic performance using sodium acetate-acetic acid-formalin-(SAF)-fixed stool specimens has not been validated...
August 31, 2016: Acta Tropica
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