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https://www.readbyqxmd.com/read/28100811/the-molecular-speciation-of-soil-transmitted-helminth-eggs-collected-from-school-children-across-six-endemic-countries
#1
Santosh George, Peter Geldhof, Marco Albonico, Shaali M Ame, Jeffrey M Bethony, Dirk Engels, Zeleke Mekonnen, Antonio Montresor, Sopheak Hem, Louis-Albert Tchuem-Tchuenté, Nguyen Thu Huong, Gagandeep Kang, Jozef Vercruysse, Bruno Levecke
BACKGROUND: The diagnosis of soil-transmitted helminths (STHs; Ascaris, Trichuris and hookworms) is traditionally based on the demonstration of eggs in stool using microscopic techniques. While molecular techniques are more appropriate to speciate STH species they are seldom applied. In this study we speciated STH eggs from stool using molecular techniques to gain insights into the distribution of both human and animal STH species in the human host. METHODS: We speciated 207 STH egg isolates from stool collected during the baseline survey of six drug efficacy trials conducted in Brazil, Cambodia, Cameroon, Ethiopia, Tanzania and Vietnam applying a PCR - restriction fragment length polymorphisms based approach...
January 18, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28098549/diffuse-unilateral-subacute-neuroretinitis-caused-by-ancylostoma-hookworm
#2
Sven Poppert, Martin Heideking, Hansjürgen Agostini, Moritz Fritzenwanker, Nicole Wüppenhorst, Birgit Muntau, Philipp Henneke, Winfried Kern, Jürgen Krücken, Bernd Junker, Markus Hufnagel
Diffuse unilateral subacute neuroretinitis is an ocular infectious disease caused by several distinct nematodes. Definite identification of the involved nematodes is rarely achieved. We report on the molecular-based genetic identification of an Ancylostoma ceylanicum hookworm implicated in a case of diffuse unilateral subacute neuroretinitis in a child.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28098526/ancylostoma-ceylanicum-hookworm-in-the-solomon-islands
#3
Richard S Bradbury, Sze Fui Hii, Humpress Harrington, Richard Speare, Rebecca Traub
Although hookworm is highly prevalent in the Solomon Islands, the species involved are unknown. We initiated this study in response to finding Ancylostoma ceylanicum hookworm in a peacekeeper in Australia who had returned from the Solomon Islands. Kato-Katz fecal surveys performed in 2013 and 2014 in 2 village groups in East Malaita, Solomon Islands, identified hookworm-positive samples. These specimens were tested by cytochrome oxidase 1 (cox-1) gene multiplex PCR and sequenced. Of 66 positive specimens, 54 (81...
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28077747/first-molecular-identifications-of-necator-americanus-and-ancylostoma-ceylanicum-infecting-rural-communities-in-lower-myanmar
#4
Win Pa Pa Aung, Thi Thi Htoon, Htay Htay Tin, Oranuch Sanpool, Jurairat Jongthawin, Lakkhana Sadaow, Issarapong Phosuk, Rutchanee Ropai, Pewpan M Intapan, Wanchai Maleewong
Hookworms are enteric parasitic roundworms infecting an estimated 400 million persons worldwide. Herein, we provide the first molecular identifications of human hookworms from certain parts of rural Lower Myanmar. DNA was extracted from hookworm-positive stool samples, as determined by microscopy. DNA sequences of the partial internal transcribed spacer 1, full length 5.8S gene, and partial internal transcribed spacer 2 were determined and compared with available hookworm sequences from public databases. Of the 11 polymerase chain reaction-positive samples, eight (Bago Region, N = 4; Mon State, N = 4) yielded sequences with high similarity to those of Necator americanus A further three sequences (Mon State, N = 2; Bago Region, N = 1) showed high similarity with those of Ancylostoma ceylanicum The latter is primarily a parasite of dogs and represents a zoonosis...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28074315/the-roundworm-strongyloides-stercoralis-in-children-dogs-and-soil-inside-and-outside-a-segregated-settlement-in-eastern-slovakia-frequent-but-hardly-detectable-parasite
#5
G Štrkolcová, M Goldová, E Bocková, J Mojžišová
A comparative study was carried out to evaluate the Strongyloides stercoralis infections in children and dogs inside and outside the segregated settlement in Medzev, Eastern Slovakia, and a survey of the soil within the settlement was included. Applying the Koga agar plate (KAP) culture method and microscopy examination of stool samples collected from 60 Roma and 21 nonRoma children, no larvae of S. stercoralis were detected but eggs of three nematodes (Ascaris lumbricoides, Trichuris trichiura, and Enterobius vermicularis) and cysts of two protozoan endoparasites (Giardia duodenalis and Cryptosporidium spp...
January 10, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28007598/identification-of-acap5-as-a-novel-factor-xa-inhibitor-with-both-direct-and-allosteric-inhibition
#6
Yuanjun Zhu, Yuan Lin, Xiaoyan Liu, Wenhui Hu, Yinye Wang
Ancylostoma caninum anticoagulant peptide 5 (AcAP5) is a potent inhibitor for coagulation factor Xa (FXa). Previous studies show that AcAP5 binds to FXa at the active site, and/or the exosite. The active site-binding contributes to direct blocking of FXa catalytic activity, but the effect of exosite-binding and the underlying mechanism remain unknown. To investigate whether and how the exosite-binding affects FXa function, we prepared several AcAP5 mutants with modifications to the active site-binding or exosite-binding region...
December 19, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28007484/diagnosis-of-intestinal-parasites-in-a-rural-community-of-venezuela-advantages-and-disadvantages-of-using-microscopy-or-rt-pcr
#7
Renzo Nino Incani, Elizabeth Ferrer, Denise Hoek, Robbert Ramak, Jeroen Roelfsema, Lapo Mughini-Gras, Titia Kortbeek, Elena Pinelli
A cross-sectional study was carried out to determine the prevalence and diagnostic performance of microscopy and real time PCR (RT-PCR) for 14 intestinal parasites in a Venezuelan rural community with a long history of persistent intestinal parasitic infections despite the implementation of regular anthelminthic treatments. A total of 228 participants were included in this study. A multiplex RT-PCR was used for the detection of Dientamoeba fragilis, Giardia intestinalis, Cryptosporidium sp. and a monoplex RT-PCR for Entamoeba histolytica...
December 19, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27956777/helminth-infections-in-domestic-dogs-from-russia
#8
REVIEW
T V Moskvina, A V Ermolenko
Dogs are the hosts for a wide helminth spectrum including tapeworms, flatworms, and nematodes. These parasites affect the dog health and cause morbidity and mortality, especially in young and old animals. Some species, as Toxocara canis, Ancylostoma caninum, Dipylidium caninum, and Echinococcus spp. are well-known zoonotic parasites worldwide, resulting in high public health risks. Poor data about canine helminth species and prevalence are available in Russia, mainly due to the absence of official guidelines for the control of dog parasites...
November 2016: Veterinary World
https://www.readbyqxmd.com/read/27925073/frequency-of-gastrointestinal-parasites-in-cats-seen-at-the-university-of-s%C3%A3-o-paulo-veterinary-hospital-brazil
#9
Solange Maria Gennari, Juliana Isabel Giuli da Silva Ferreira, Hilda Fátima de Jesus Pena, Marcelo Bahia Labruna, Sérgio Dos Santos Azevedo
The frequency of gastrointestinal infections in 502 cats seen at the Veterinary Hospital of the University of São Paulo, SP, Brazil, between 2005 and 2014, was measured. The samples were analyzed using methods of flotation and sedimentation. The results were compared with those from studies published previously using fecal samples from the same hospital at different times. Associations between the frequency of positivity for each parasite and age, breed, sex, diarrhea and use of anthelmintic were investigated (chi-square or Fisher's exact tests)...
October 2016: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/27925072/occurrences-of-gastrointestinal-parasites-in-fecal-samples-from-domestic-dogs-in-s%C3%A3-o-paulo-sp-brazil
#10
Juliana Isabel Giuli da Silva Ferreira, Hilda Fátima Jesus Pena, Sérgio Santos Azevedo, Marcelo Bahia Labruna, Solange Maria Gennari
Occurrences of gastrointestinal parasites were assessed in fecal samples from 3,099 dogs in the metropolitan region of São Paulo, SP, that were treated at the Veterinary Hospital of the University of São Paulo Veterinary School. The samples were analyzed using the flotation and centrifugal sedimentation methods. The results were compared with those from previous studies (at different times). The frequency of each parasite was correlated with the dogs' ages, breeds and gender, as well as the occurrences of diarrhea and the use of anthelmintics, by means of the chi-square or Fisher exact test...
October 2016: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/27876926/a-survey-study-on-gastrointestinal-parasites-of-stray-cats-in-azarshahr-east-azerbaijan-province-iran
#11
Nasser Hajipour, Aabbas Imani Baran, Mohammad Yakhchali, Seyed Mehdi Banan Khojasteh, Farzam Sheikhzade Hesari, Bijan Esmaeilnejad, Jafar Arjmand
Gastrointestinal parasites are among the most common parasitic infections found in stray cats, which might act potential helminthic parasites to domestic cats. The objective of this study was to determine the prevalence of gastrointestinal parasites in stray cats in the city of Azarshahr, which is located in East Azerbaijan province, Iran. A cross-sectional study was conducted on 50 necropsied stray cats, trapped and collected from different geographic regions of Azarshahr. From a total 50 stray cats examined, 15 (30 %) were female and 35 (70 %) were male...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27810261/effect-of-paecilomyces-lilacinus-trichoderma-harzianum-and-trichoderma-virens-fungal-extracts-on-the-hatchability-of-ancylostoma-eggs
#12
Bianca Delgado Menezes Hofstätter, Anelise Oliveira da Silva Fonseca, Fernando de Souza Maia Filho, Julia de Souza Silveira, Beatriz Maroneze Persici, Luciana Pötter, Andressa Silveira, Zaida Inês Antoniolli, Daniela Isabel Brayer Pereira
BACKGROUND: Ancylostoma species have demanded attention due to their zoonotic potential. The use of anthelmintics is the usual method to prevent environmental contamination by Ancylostoma eggs and larvae. Nematophagous fungi have been widely used in their biological control due to the fungus ability to capture and digest free nematode forms. AIMS: The aim of this study was to evaluate the effect of four different fungal extracts of Paecilomyces lilacinus (n=2), Trichoderma harzianum (n=1) and Trichoderma virens (n=1) isolates on the hatchability of Ancylostoma eggs...
October 31, 2016: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/27761403/rangelia-vitalii-in-a-free-ranging-maned-wolf-chrysocyon-brachyurus-and-co-infections
#13
Julia Angélica Gonçalves Silveira, Mirella Lauria D'Elia, Isabela de Oliveira Avelar, Lara Ribeiro de Almeida, Hudson Andrade Dos Santos, Danielle Ferreira de Magalhães Soares, Múcio Flávio Barbosa Ribeiro, Walter Dos Santos Lima, Roselene Ecco
An adult free-ranged female maned wolf was rescued from a periurban area subject to anthropogenic disturbances in the Minas Gerais, Brazil. The animal presented poor body condition and anemia. The clinical condition rapidly deteriorated culminating in dead and a necropsy was performed. The main gross lesions were marked anemia and blood content in the intestines accompanied by many types of parasites. The protozoa Rangelia vitalii was identified by histopathological analysis predominantly within the cytoplasm of endothelial cells of capillaries of the small intestine...
December 2016: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/27751868/microfluidic-platform-for-electrophysiological-recordings-from-host-stage-hookworm-and-ascaris-suum-larvae-a-new-tool-for-anthelmintic-research
#14
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...
December 2016: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/27733798/gastrointestinal-helminths-of-coyotes-canis-latrans-from-southeast-nebraska-and-shenandoah-area-of-iowa
#15
Whitni K Redman, Jay E Bryant, Gul Ahmad
AIM: This survey was carried out on the carcasses of 29 coyotes from Southeastern Nebraska and Shenandoah area of Iowa to document the helminths present in the intestinal track of these carnivorous animals. MATERIALS AND METHODS: A total of 29 adult coyote carcasses were generously donated in the autumn and winter (November-February) of 2014-2015 by trappers, fur buyers and hunters of Southeast Nebraska and Shenandoah area of Iowa. The intestine of individual animals were examined for the recovery of helminth parasites as per the established procedures...
September 2016: Veterinary World
https://www.readbyqxmd.com/read/27677574/the-hookworm-ancylostoma-ceylanicum-intestinal-transcriptome-provides-a-platform-for-selecting-drug-and-vaccine-candidates
#16
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
https://www.readbyqxmd.com/read/27658607/a-case-of-ancylostoma-ceylanicum-infection-occurring-in-an-australian-soldier-returned-from-solomon-islands
#17
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
https://www.readbyqxmd.com/read/27642240/molecular-modeling-and-structural-analysis-of-arylesterase-of-ancylostoma-duodenale
#18
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
https://www.readbyqxmd.com/read/27623952/changes-in-biochemical-analytes-in-female-dogs-with-subclinical-ancylostoma-spp-infection
#19
Elizabeth M S Schmidt, Asta Tvarijonaviciute, Silvia Martinez-Subiela, José J Cerón, Peter D Eckersall
BACKGROUND: Ancylostoma spp. is one of the most prevalent canine intestinal nematode infections which usually causes subclinical disease in adult dogs and has zoonotic implications. Therefore, the aim of this study was to explore and evaluate the possible pathophysiological changes that Ancylostoma spp. could produce in female dogs naturally infected but without clinical signs of disease, by screening a wide variety of biochemical markers for potential changes. Samples of feces and blood of 45 dogs were collected and fecal flotation and zinc sulphate centrifugal flotation were performed...
September 13, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27584977/phenolic-metabolites-of-dalea-ornata-affect-both-survival-and-motility-of-the-human-pathogenic-hookworm-ancylostoma-ceylanicum
#20
Kaitlin Deardorff, William Ray, Eric Winterstein, MacKenzie Brown, Jocelyn McCornack, Brianda Cardenas-Garcia, Kiah Jones, Sarah McNutt, Shannon Fulkerson, Daneel Ferreira, Charlotte Gény, Xiaoyan Chen, Gil Belofsky, Blaise Dondji
Hookworms are ubiquitous human parasites, infecting nearly one billion people worldwide, and are the leading cause of anemia and malnutrition in resource-limited countries. Current drug treatments rely on the benzimidazole derivatives albendazole and mebendazole, but there is emerging resistance to these drugs. As part of a larger screening effort, using a hamster-based ex vivo assay, anthelmintic activity toward Ancylostoma ceylanicum was observed in the crude extract of aerial parts of Dalea ornata. These studies have led to the isolation and characterization of phenolic metabolites 1-10...
September 23, 2016: Journal of Natural Products
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