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Toxocariasis

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https://www.readbyqxmd.com/read/29141740/a-lateral-flow-rapid-test-for-human-toxocariasis-developed-using-three-toxocara-canis-recombinant-antigens
#1
Muhammad Hafiznur Yunus, Siti Naqiuyah Tan Farrizam, Izzati Zahidah Abdul Karim, Rahmah Noordin
Laboratory diagnosis of toxocariasis is still a challenge especially in developing endemic countries with polyparasitism. In this study, three Toxocara canis recombinant antigens, rTES-26, rTES-30, and rTES-120, were expressed and used to prepare lateral flow immunoglobulin G4 (IgG4) dipsticks. The concordance of the results of the rapid test (comprising three dipsticks) with a commercial IgG-enzyme-linked immunosorbent assay (ELISA) (Cypress Diagnostics, Belgium) was compared against the concordance of two other commercial IgG-ELISA kits (Bordier, Switzerland and NovaTec, Germany) with the Cypress kit...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29128441/toxocariasis-in-africa-a-one-health-perspective
#2
EDITORIAL
Sonja Hartnack, Grace Alobo, Clovice Kankya
No abstract text is available yet for this article.
November 8, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/29114122/dot-enzyme-linked-immunosorbent-assay-elisa-for-the-detection-of-toxocara-infection-using-a-rat-model
#3
Vachel Gay V Paller, Cyrelle M Besana, Isabel Kristine M Valdez
Toxocariasis is a zoonotic disease usually caused by dog and cat roundworms, Toxocara canis and T. cati. Detection and diagnosis is difficult in paratenic and accidental hosts, including humans, as they cannot be detected through conventional methods such as fecal examination. Diagnosis therefore relies on immunological methods and molecular methods such as enzyme-linked immunosorbent assay (ELISA) and Western Blot, which are both time-consuming and requires sophisticated equipment. In the Philippines, only a few studies are available on Toxocara seroprevalence...
December 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/29071468/toxocariasis-critical-analysis-of-serology-in-patients-attending-a-public-referral-center-for-ophthalmology-in-brazil
#4
Guita Rubinsky-Elefant, Joyce H Yamamoto, Carlos E Hirata, Luiz E Prestes-Carneiro
PURPOSE: To analyze the contribution of IgG anti-Toxocara antibodies in the diagnosis of ocular toxocariasis (OT) in serum samples of patients attending a public referral center for ophthalmology in Brazil and to determine the most frequent ocular signs and symptoms. STUDY DESIGN: This was a retrospective descriptive study of a cohort of outpatients followed from December 1989 to May 2006. METHODS: IgG anti-Toxocara antibody titers were determined by enzyme-linked immunosorbent assay...
October 25, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29037977/toxocariasis-in-humans-in-africa-a-systematic-review
#5
REVIEW
Felix Lötsch, Rieke Vingerling, Rene Spijker, Martin Peter Grobusch
BACKGROUND: Toxocariasis is a globally distributed zoonosis. The most important definitive hosts are dogs, whereas humans serve as paratenic hosts. Transmission to humans occurs by accidental ingestion of eggs, e.g. by consumption of contaminated fruit or vegetables. Although exposure to Toxocara is usually considered as relatively benign, it is implicated in a range of neurological, ophthalmologic and other organ-specific conditions, some of them with grave consequences. This review provides an overview on the epidemiology, presentation and risk factors of exposure to Toxocara in Africa...
October 13, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/29020386/seroprevalence-of-antibodies-to-toxocara-species-in-the-united-states-and-associated-risk-factors-2011-2014
#6
Eugene W Liu, Holly M Chastain, Sun Hee Shin, Ryan Wiegand, Deanna Kruszon-Moran, Sukwan Handali, Jeffrey L Jones
Background: Toxocariasis results from infection with larval stages of a dog and cat intestinal nematode and causes human morbidity. The current US estimate of Toxocara exposure is 13.9% (NHANES III 1988-1994). Methods: We used a multiplex bead based assay (Tc-CTL-1MBA) with purified Toxocara canis antigen to estimate Toxocara antibody seroprevalence in serum of 13,509 persons six years and older from the National Health and Nutrition Examination Survey (NHANES), 2011-2014 and identified seropositivity risk factors...
September 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29016316/toxocara-seroprevalence-and-associated-risk-factors-in-the-united-states
#7
Andrew N Berrett, Lance D Erickson, Shawn D Gale, Allison Stone, Bruce L Brown, Dawson W Hedges
Caused by the parasitic nematodes Toxocara canis and cati, toxocariasis in humans can result in covert toxocariasis, ocular toxocariasis, visceral larval migrans, and neurotoxocariasis. A common infection, toxocariasis exposure varies widely within and between countries, with a previous estimate of Toxocara seroprevalence using data from 1988 to 1994 in the United States of approximately 13%. Age, poverty, sex, educational attainment, ethnicity, and region have been associated with Toxocara seroprevalence. In this study, we sought to determine the seroprevalence of and factors associated with Toxocara seropositivity in the United States using data from the National Health and Nutrition Examination Survey from 2011 to 2014 to provide a more recent estimate of Toxocara seroprevalence in the United States...
September 25, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28928264/role-of-ultrasound-biomicroscopy-in-diagnosis-of-ocular-toxocariasis
#8
Qian Chen, Junxiang Gu, Rui Jiang, Min Zhou, Qing Chang
PURPOSE: To investigate ultrasound biomicroscopy (UBM) characteristics of patients with ocular toxocariasis (OT) and to explore the role of UBM in the diagnosis and differential diagnosis of OT. DESIGN: Cross-sectional study. METHODS: 78 eyes of 77 patients clinically consistent with OT and confirmed by serum and/or intraocular antibodies in a single tertiary centre (Fudan University Eye and ENT Hospital, Shanghai) between July 2009 and July 2016 were included in the study...
September 19, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28917315/protective-and-risk-factors-associated-with-the-presence-of-toxocara-spp-eggs-in-dog-hair
#9
Yslla Fernanda Fitz Balo Merigueti, Vamilton Alvares Santarém, Lívia Magosso Ramires, Aline da Silveira Batista, Layron Vinícus da Costa Beserra, Amábyle Lopes Nuci, Talita Mirella de Paula Esposte
Toxocariasis is one of the most prevalent parasitic zoonoses in the world. The disease is principally caused by the nematode Toxocara canis, whose definitive host is the dog. The transmission of toxocariasis to humans is mainly caused by accidental ingestion of embryonated eggs of the parasite, present in the soil. Studies have shown that dog hair has the capacity to harbor eggs of the parasite and represents a risk for transmission of the zoonosis. The objective of the present study was to evaluate the frequency and factors associated with the contamination of dog hair by Toxocara spp...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28831225/identification-of-toxocara-spp-eggs-in-dog-hair-and-associated-risk-factors
#10
Tania O Rojas, Camilo Romero, Rafael Heredia, Linda G Bautista, Galia Sheinberg
AIM: The aim of the study was to identify the presence of eggs of Toxocaraspp. in dog hair and to identify any risk factors associated with this. MATERIALS AND METHODS: A total of 96 dogs were sampled collecting hair from the head, perianal and hindquarters. Epidemiologic data from each animal were recorded to identify risk factors. The samples of hair were washed with solutions of distilled water, phosphate-buffered saline and Tween 20 detergent. Microscopic analysis was subsequently performed for the identification of eggs...
July 2017: Veterinary World
https://www.readbyqxmd.com/read/28820703/assessment-of-u-s-pediatrician-knowledge-of-toxocariasis
#11
Dana M Woodhall, Amanda P Garcia, Craig A Shapiro, Shequenta L Wray, Andi L Shane, Chitra S Mani, Kelly K Stimpert, LeAnne M Fox, Susan P Montgomery
Toxocariasis, one of a group of parasitic diseases known as neglected parasitic infections, is a disease caused by the larvae of two species of Toxocara roundworms, Toxocara canis, from dogs, and less commonly Toxocara cati, from cats. Although most infected individuals are asymptomatic, clinical manifestations may include fever, fatigue, coughing, wheezing, or abdominal pain (visceral toxocariasis) or vision loss, retina damage, or eye inflammation (ocular toxocariasis). To assess U.S. pediatrician knowledge of toxocariasis, we conducted an electronic survey of American Academy of Pediatrics members...
October 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28781085/human-toxocariasis
#12
REVIEW
Guangxu Ma, Celia V Holland, Tao Wang, Andreas Hofmann, Chia-Kwung Fan, Rick M Maizels, Peter J Hotez, Robin B Gasser
Parasitic nematodes of the genus Toxocara are socioeconomically important zoonotic pathogens. These parasites are usually directly transmitted to the human host via the faecal-oral route and can cause toxocariasis and associated complications, including allergic and neurological disorders. Although tens of millions of people are estimated to be exposed to or infected with Toxocara spp, global epidemiological information on the relationship between seropositivity and toxocariasis is limited. Recent findings suggest that the effect of toxocariasis on human health is increasing in some countries...
August 3, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28761471/detection-of-toxocara-spp-eggs-in-the-soil-of-public-places-in-and-around-of-ardabil-city-northwestern-iran
#13
Ali Pezeshki, Ali Haniloo, Asghar Alejafar, Behnam Mohammadi-Ghalehbin
BACKGROUND: Human toxocariasis is contained in the list of neglected diseases. The infection occurs after ingestion of embryonated eggs in contaminated soil. The present study was carried out to estimate the extent of soil contamination with Toxocara spp. eggs in the public places. METHODS: Soil samples were collected randomly from 41 public places in various parts in and around of Ardabil, Iran, between March 2013 and March 2014. Data were examined by microscopy following sodium nitrate flotation...
January 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28761463/the-33-1-kda-excretory-secretory-protein-produced-by-toxocara-canis-larvae-serves-as-a-potential-common-biomarker-for-serodiagnosis-of-toxocariasis-in-paratenic-animals-and-human
#14
Huu-Hung Nguyen, Doan-Trung Vo, Thi-Tuyet-Trinh Thai, Thi-Thanh-Thao LE, Thanh-Dong LE, Nghia-Son Hoang
BACKGROUND: Toxocariasis is a prevalent zoonosis disease caused by the closely related nematode species Toxocara canis and Toxocara cati which parasitise Canidae and Felidae respectively. In paratenic hosts, larvae of these worms cause multiple organ damage. However, how these paratenic hosts response to these worms and whether any common biomarker can be applied for diagnosis are still unclear. METHODS: Excreted/secreted (E/S) antigens were prepared by culture of T...
January 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28759601/prevalence-of-toxocara-species-infection-in-the-u-s-results-from-the-national-health-and-nutrition-examination-survey-2011-2014
#15
Aaron Farmer, Thomas Beltran, Young Sammy Choi
Toxocariasis is one of the most common neglected infections of poverty in the U.S. with a reported National Health and Nutrition Examination Survey (NHANES) III (1988-1994) seroprevalence of 13.9% based on enzyme immunoassay testing. We reviewed NHANES data from 2011-2014 to assess current levels. Sera collected from NHANES 2011-2014 participants six years and older were tested for exposure using rTc-CTL-1 antigen, a more sensitive and specific recombinant antigen for IgG antibodies for Toxocara spp. These results were subdivided into children (age 6-17) and adults (age ≥ 18) and then compared between various sociodemographic characteristics...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28727331/-toxocariasis-a-neglected-disease-in-switzerland
#16
Amélie Duréault, Carlos Perez Valdes, Lalensia Weber, Adam Ogna, Christine Sempoux, Oriol Manuel, Julie Delaloye
Toxocariasis is a zoonotic disease that occurs when humans are infected by the parasites Toxocara canis or Toxocara cati. Toxocariasis is highly prevalent in tropical areas, but can also be found in industrialized countries, particularly in rural areas. Clinical presentation can range from asymptomatic infection to more severe disease. Diagnosis of toxocariasis is based on suggestive clinical findings, eosinophilia and a positive serological testing. Albendazole represents the first-line treatment, associated with corticosteroids in case of severe disease...
April 12, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28689247/loop-mediated-isothermal-amplification-as-a-reliable-assay-for-toxocara-canis-infection-in-pet-dogs
#17
Paria Khoshakhlagh, Adel Spotin, Mahmoud Mahami-Oskouei, Abbas Shahbazi, Maryam Ozlati
Keeping of infected dogs as pet results in the potential transmission risk factors for shedding helminthic infections such as toxocariasis. Lack of accurate identification of Toxocara canis eggs in non-dewormed infected pet dogs remains a diagnostic concern among researchers. In this study, dog owners were asked to fill up a questionnaire regarding their pets and their attitude towards the deworming regimen. One hundred faecal samples were collected from pet dogs (Northwest Iran) and were subsequently identified by the ZnSo4 flotation technique, PCR and loop-mediated isothermal amplification (LAMP) assays...
July 9, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28606326/evaluation-of-the-transcription-of-interleukin-12-in-the-intestinal-mucosa-of-mice-subjected-to-experimental-toxocariasis-and-supplemented-with-saccharomyces-boulardii
#18
Micaele Quintana de Moura, Wesley Douglas da Silva Terto, Sabrina Taiza Jeske, Leonardo Mortagua de Castro, Natália Berne Pinto, Luciana Farias da Costa Avila, Fabio Pereira Leivas Leite, Maria Elisabeth Aires Berne
No abstract text is available yet for this article.
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28591555/seroepidemiological-study-and-associated-risk-factors-of-toxocara-canis-infection-among-preschool-children-in-osun-state-nigeria
#19
Oluyomi A Sowemimo, Yueh-Lun Lee, Samuel O Asaolu, Ting-Wu Chuang, Olaoluwa P Akinwale, Bolaji O Badejoko, Vincent P Gyang, Timothy Nwafor, Emmanuel Henry, Chia-Kwung Fan
Human toxocariasis is caused by the nematode, Toxocara canis and it is a poorly understood phenomenon in Nigeria. Seroepidemiological studies have not been previously carried out among the preschool aged children in Nigeria. A cross-sectional study was conducted in pre-school children in four communities from Osun State, Nigeria between January and July 2016. A total of 308 children Aged 9 months and 5 years were studied comprising 53.2% (164/308) male and 46.8% (144/308) female. Blood samples were collected and screened for the presence of anti-Toxocara IgG antibodies by Western blot analysis based on the excretory-secretory antigens of larva T...
June 4, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28543101/immunoglobulin-m-antibodies-are-not-specific-for-serodiagnosis-of-human-toxocariasis
#20
W H Roldán, G R Elefant, A W Ferreira
Serodiagnosis of human toxocariasis is established by detecting serum anti-Toxocara IgG antibodies, but there is little knowledge regarding the reactivity of human IgM antibodies against the Toxocara antigens. In this study, we have evaluated the reactivity of IgM antibodies in sera from patients with toxocariasis, patients with other helminth infections, and healthy individuals, against Toxocara larval excretory-secretory (TES) antigens by enzyme-linked immunosorbent assay (ELISA) and Western blot (WB). Anti-Toxocara IgM were detected in 91...
May 25, 2017: Parasite Immunology
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