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Toxocariasis

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https://www.readbyqxmd.com/read/28443979/experimental-toxocariasis-in-balb-c-mice-relationship-between-parasite-inoculum-and-the-igg-immune-response
#1
Gabriela Rodrigues E Fonseca, Sergio Vieira Dos Santos, Pedro Paulo Chieffi, Fabiana Martins de Paula, Ronaldo Cesar Borges Gryschek, Susana Angélica Zevallos Lescano
BALB/c mice were inoculated with 5-500 Toxocara canis infective eggs, and bled at 15-120 days post infection (dpi) to evaluate the dynamics of IgG antibody response and larvae distribution. Positive results were observed in all occasions for every inoculum, and a direct proportional relationship between antibody detection and the parasitic load was observed. In samples collected at 60 dpi, detection of IgG was more intense, especially with the 50 and 500 egg doses; also, a correlation between antibody level and egg count was observed with these two inocula...
May 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28438141/prevalence-of-toxocara-antibodies-among-patients-clinically-suspected-to-have-ocular-toxocariasis-a-retrospective-descriptive-study-in-sri-lanka
#2
Devika Iddawela, Kiruthiha Ehambaram, Pemindra Bandara
BACKGROUND: Human toxocariasis, caused by Toxocara canis, T. cati, and T. vitulorum of dogs, cats and ruminants respectively, is recognized as an important zoonotic infection worldwide. The typical clinical syndromes of toxocariasis in humans are ocular larva migrans (OLM) and visceral larva migrans (VLM). The most commonly affected sites of OLM are the peripheral retina and/or vitreous humor. In Sri Lanka, there is a dearth of information on prevalence of ocular infection in our population...
April 24, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28434412/molecular-characterization-and-transcriptional-analysis-of-the-female-enriched-chondroitin-proteoglycan-2-of-toxocara-canis
#3
G X Ma, R Q Zhou, L Hu, Y L Luo, Y F Luo, H H Zhu
Toxocara canis is an important but neglected zoonotic parasite, and is the causative agent of human toxocariasis. Chondroitin proteoglycans are biological macromolecules, widely distributed in extracellular matrices, with a great diversity of functions in mammals. However, there is limited information regarding chondroitin proteoglycans in nematode parasites. In the present study, a female-enriched chondroitin proteoglycan 2 gene of T. canis (Tc-cpg-2) was cloned and characterized. Quantitative real-time polymerase chain reaction (qRT-PCR) was employed to measure the transcription levels of Tc-cpg-2 among tissues of male and female adult worms...
April 24, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28352060/evaluation-of-the-prevalence-and-clinical-impact-of-toxocariasis-in-patients-with-eosinophilia-of-unknown-origin
#4
Hong-Beum Kim, Jun-Won Seo, Jun-Hyung Lee, Byung-Seok Choi, Sang-Gon Park
BACKGROUND/AIMS: Eosinophilia has numerous diverse causes, and in many patients, it is not possible to establish the cause of eosinophilia. Recently, toxocariasis was introduced as one cause of eosinophilia. The aims of this study were to evaluate the prevalence of toxocariasis and the clinical impact of albendazole treatment for toxocariasis in patients suspected of eosinophilia of unknown origin. METHODS: We performed a retrospective chart review. After evaluation of cause of eosinophilia, the patients suspected of eosinophilia of unknown origin performed immunoglobulin G antibody specific assay for the Toxocara canis larval antigen by enzyme-linked immunosorbent assay...
May 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28351684/tissue-distribution-and-functional-analysis-of-vitellogenin-6-of-toxocara-canis
#5
Hong-Hong Zhu, Guang-Xu Ma, Yong-Fang Luo, Yong-Li Luo, Sha-Sha Yin, Yi Xiong, Rong-Qiong Zhou
Toxocara canis is an common intestinal nematode of canids and the principal causative agent of human toxocariasis. Vitellogenin (Vg), a source of amino acids and lipids in the eggs, are considered to play an important role in embryo development of a wide range of organisms. In the present study, the transcriptional levels of Tc-vit-6 gene in male and female adult T. canis were determined by quantitative real-time PCR, which indicated high transcription of Tc-vit-6 in the intestine, reproductive tract and body wall of male and female adult T...
March 27, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28302681/ultrasound-biomicroscopic-imaging-in-paediatric-ocular-toxocariasis
#6
Jinghua Liu, Songfeng Li, Guangda Deng, Wenli Yang, Wei Chen, Hai Lu
PURPOSE: To determine the potential and usefulness of ultrasound biomicroscopy (UBM) as a diagnostic procedure on a larger cohort of paediatric patients with ocular toxocariasis. METHODS: UBM was performed on 41 eyes of 41 patients with ocular toxocariasis in order to determine configuration of peripheral retina, pars plana and vitreous. Location and range of peripheral pathology using ophthalmoscopy with scleral indentation, UBM and intraoperative confirmation were recorded and compared...
March 16, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28259548/seroprevalence-of-five-neglected-parasitic-diseases-among-immigrants-accessing-five-infectious-and-tropical-diseases-units-in-italy-a-cross-sectional-study
#7
G Martelli, C Di Girolamo, L Zammarchi, A Angheben, M Morandi, S Tais, M Degani, I El Hamad, S Caligaris, A Ciannameo, E Grilli, L Urbinati, G B Monteiro, C Scarcella, N Petrosillo, M Digaetano, L Rabbi, N Bazzanini, F Cacciatore, B L Marta, M L Moro, A Bartoloni, P Viale, G Verucchi
OBJECTIVE: This multicentre cross-sectional study aims to estimate the prevalence of five neglected tropical diseases (Chagas disease, filariasis, schistosomiasis, strongyloidiasis and toxocariasis) among immigrants accessing health care facilities in five Italian cities (Bologna, Brescia, Florence, Rome, Verona). METHODS: Individuals underwent a different set of serological tests, according to country of origin and presence of eosinophilia. Seropositive patients were treated and further followed up...
March 1, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28188768/frequency-of-toxocara-spp-antibodies-in-umbilical-cords-of-newborns-attended-atthe-university-hospital-in-southern-brazil-and-factors-associated-with-infection
#8
Paula Costa Santos, Paula Lima Telmo, Lis Maurente Lehmann, Carolina Lorenzi, Carolina Hirsch, Gabriela Torres Mattos, Gabriel Baracy Klafke, Maria Elisabeth Aires Berne, Carla Vitola Gonçalves, Carlos James Scaini
Toxocariasis is a neglected and geographically widespread parasitic disease. The detection of specific antibodies associated with this disease is required to confirm its clinical diagnosis and to aid in prevention. Although helminth infection during pregnancy can promote foetal immune responses with long-term effects, specific information regarding the risk of Toxocara spp. infection to the human foetus during pregnancy is lacking. Therefore, the present study aimed to investigate the frequency of antibodies against Toxocara spp...
June 2017: Acta Tropica
https://www.readbyqxmd.com/read/28164001/abdominal-mass-secondary-to-human-toxocariasis
#9
Javad Ghoroobi, Leily Mohajerzadeh, Maliheh Khoddami, Alireza Mirshemirani, Naser Sadeghian, Alireza Mahdavi, Sayeh Hatefi
Toxocariasis is an extensive helminthic infection that leads to visceral larva migrans in humans. A 2.5-year-old girl referred for abdominal mass. She had history of pharyngitis for two weeks. There were no other symptoms. Abdominal examination revealed an irregular solid mass in right lower quadrant (RLQ). Abdominal ultrasonography revealed an echohetrogenic large mass in RLQ, liver, and retroperitoneal area. Abdominal CT scan showed a huge mass. At laparotomy a large retroperitoneal mass that involved right liver lobe, bladder, ileocecal valve, small and large intestines was found...
January 2017: APSP Journal of Case Reports
https://www.readbyqxmd.com/read/28157623/toxocariasis-of-the-central-nervous-system-with-report-of-two-cases
#10
Bouthouri Abir, Mansour Malek, Mrissa Ridha
Toxocariasis is a parasitic infection caused by the roundworms Toxocara canis or Toxocara cati, mostly due to accidental ingestion of embryonated eggs. Clinical manifestations vary and are classified according to the organs affected. Central nervous system involvement is an unusual complication. Here, we report two cases with neurological manifestations, in which there was cerebrospinal fluid (CSF) eosinophilia with marked blood eosinophilia and a positive serology for Toxocara both in serum and CSF. Improvement of signs and symptoms after specific treatment was observed in the two cases...
March 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28155105/toxocara-vitulorum-infection-in-german-beef-cattle
#11
Peter L Venjakob, Gerhard Thiele, Peter-Henning Clausen, Ard M Nijhof
Toxocara vitulorum is an ascarid that is frequently found in sub-tropical regions but little is known about infections in more temperate climates. In this study, we report the occurrence of this parasite in a beef cattle herd in eastern Germany. In June 2016, large (14-20 cm) cream-colored worms identified as adult T. vitulorum were observed in the feces of 2- to 3-month-old calves. Eggs of this parasite were subsequently detected in pooled fecal samples collected on all three farm sites. The morphological identification was supported by analysis of partial cytochrome c oxidase I and internal transcribed spacer 1 gene sequences...
February 2, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28151857/association-between-intermediate-uveitis-and-toxocariasis-in-the-korean-population
#12
Jin-Woo Kwon, Yoonseob Sim, Donghyun Jee
The aim of the study was to investigate the characteristics of ocular toxocariasis (OT) presenting with intermediate uveitis in the Korean population.We studied intermediate uveitis patients using ocular and systemic evaluations and a Toxocara IgG serology test.Of 50 intermediate uveitis patients, 19 were seropositive for Toxocara IgG. Of the 19 OT patients, 4 presented with recurrence within 6 months and were significantly younger than nonrecurrence patients (P = 0.009). Thirteen patients had a history of eating raw cow liver...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28141958/genetic-analysis-of-toxocara-cati-nematoda-ascarididae-from-guangdong-province-subtropical-china
#13
Xi He, Meng-Na Lv, Guo-Hua Liu, Rui-Qing Lin
Toxocara cati (cat roundworm) is a common parasitic nematode that infects humans and other hosts, causing toxocariasis. Although its significance as a pathogen, the epidemiology, genetics and biology of T. cati remain poorly understand in China. In the present study, genetic variation in mitochondrial (mt) cytochrome c oxidase subunit 1 (cox1) gene and internal transcribed spacer (ITS) of rDNA region among T. cati in Guangdong province, subtropical China was examined. A portion of the cox1 (pcox1) and the complete ITS (ITS1 + 5...
January 31, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28138052/estimating-burdens-of-neglected-tropical-zoonotic-diseases-on-islands-with-introduced-mammals
#14
Luz A de Wit, Donald A Croll, Bernie Tershy, Kelly M Newton, Dena R Spatz, Nick D Holmes, A Marm Kilpatrick
AbstractMany neglected tropical zoonotic pathogens are maintained by introduced mammals, and on islands the most common introduced species are rodents, cats, and dogs. Management of introduced mammals, including control or eradication of feral populations, which is frequently done for ecological restoration, could also reduce or eliminate the pathogens these animals carry. Understanding the burden of these zoonotic diseases is crucial for quantifying the potential public health benefits of introduced mammal management...
March 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28096863/seroepidemiological-study-of-toxocariasis-in-the-owners-of-domestic-cats-and-dogs-in-mashhad-northeastern-iran
#15
Fariba Berenji, Ali Pouryousef, Abdolmajid Fata, Mahmoud Mahmoudi, Maryam Salehi, Javad Khoshnegah
BACKGROUND: Toxocariasis is the clinical terms applied to infection of human with Ascarid nematodes in the order Ascaridida, named Toxocara canis and T. cati. Because in recent years in Iran many people desire to keep pets (cats and dogs), and lacking of seroepidemiological study of toxocariasis in Mashhad, we decided to determine the seroprevalence of toxocariasis among people who own cats and dogs in comparison with control group. METHODS: A serological study for detection antibodies to Toxocara in two groups (93 cat and dog owners and 93 healthy people as control group) was conducted from Feb 2013 to Dec 2013...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28096624/genetic-variability-and-discrimination-of-low-doses-of-toxocara-spp-from-public-areas-soil-inferred-by-loop-mediated-isothermal-amplification-assay-as-a-field-friendly-molecular-tool
#16
Maryam Ozlati, Adel Spotin, Abbas Shahbazi, Mahmoud Mahami-Oskouei, Teimour Hazratian, Mohammad Adibpor, Ehsan Ahmadpour, Afsaneh Dolatkhah, Paria Khoshakhlagh
ABSTRACT: Aim: One of the main diagnostic problems of conventional polymerase chain reaction (PCR) is indiscrimination of low parasitic loads in soil samples. The aim of this study is to determine the genetic diversity and identification of Toxocara spp. from public areas soil inferred by loop-mediated isothermal amplification (LAMP) assay. MATERIALS AND METHODS: A total of 180 soil samples were collected from various streets and public parks of northwest Iran. The DNA of recovered Toxocara eggs were extracted and amplified by PCR and LAMP following ZnSO4 flotation technique...
December 2016: Veterinary World
https://www.readbyqxmd.com/read/28077610/seroprevalence-of-toxocariasis-in-children-with-urticaria-a-population-based-study
#17
Paula Mayara Matos Fialho, Carlos Roberto Silveira Correa, Susana Zevallos Lescano
OBJECTIVE: This study described the prevalence of IgG class antibodies against Toxocara spp. and their association with urticaria in 2- to 12-year-old children. METHODS: This population-based cross-sectional study was conducted between May 2012 and September 2014. The study sample comprised 168 children. Blood samples were collected to verify the presence of toxocariasis by using ELISA to detect IgG antibodies. The guardians of the children were interviewed to characterize the presence or absence of other diseases, such as urticaria...
January 10, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28043392/influence-of-land-use-and-meteorological-factors-on-the-spatial-distribution-of-toxocara-canis-and-toxocara-cati-eggs-in-soil-in-urban-areas
#18
Xiang Gao, Hongbin Wang, Jianxin Li, Hongyu Qin, Jianhua Xiao
Soil which has been contaminated by Toxocara spp. eggs is considered as one of the main infection sources of Toxocariasis in animals and humans. The present study conducted a detailed investigation into the spatial patterns of Toxocara canis (T. canis) and Toxocara cati (T. cati) eggs in soil in urban area of northeastern Mainland China, and assessed the inter-relationships between meteorological factors, land use and the distribution of the Toxocara spp. eggs. Polymerase chain reaction (PCR) was used for the determination of T...
January 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/27901644/clinical-profile-treatment-and-visual-outcome-of-ocular-toxocara-in-a-tertiary-eye-care-centre
#19
Ekta S Sahu, Bikramjit Pal, Tarun Sharma, Jyotirmay Biswas
PURPOSE: To determine the clinical features, treatment, and visual outcome in ocular toxocariasis. METHODS: A total of 16 cases diagnosed as ocular toxocariasis clinically and/or serologically were analyzed retrospectively. RESULTS: The mean age of the patients was 22.6 years. Cases were categorized into three clinical types with peripheral granuloma (43.7%) as the most common presentation. Of the patients, 10 (62.5%) had positive serum ELISA for T...
November 30, 2016: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/27866477/cross-reactivity-of-the-31-kda-antigen-of-angiostrongylus-cantonensis-dealing-with-the-immunodiagnosis-of-meningoencephalitis
#20
Alessandra L Morassutti, Lisa N Rascoe, Sukwan Handali, Alexandre J DA Silva, Patricia P Wilkins, Carlos Graeff-Teixeira
The primary causative agent of eosinophilic meningoencephalitis (EoM) in endemic regions is the nematode Angiostrongylus cantonensis. The occurrence of EoM was previously restricted to countries in Southeast Asia and the Pacific Islands; however, more recently, it has been reported from other regions, including Brazil. The commonly used diagnosis is detection of specific antibody reactivity to the 31 kDa antigen, which is derived from female worm somatic extracts. Here we report the occurrence of cross-reactivity to this antigen in sera from other parasitic infections, especially those that may cause EoM, such as gnathostomiasis, toxocariasis, hydatidosis and strongyloidiasis...
November 21, 2016: Parasitology
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