ArticleEpidemiology and infection2016
Genotyping of Giardia duodenalis isolates in asymptomatic children attending daycare centre: evidence of high risk for anthroponotic transmission.
Article in Epidemiology and infection, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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Who cites it
15 citing papers in PubMed, 28 citations in OpenAlex.
- Genotyping and distribution ofParasitology · 2026Article
- The opportunistic protist,Emerging microbes & infections · 2023Article
- Multilocus sequence typing ofFrontiers in medicine · 2022Article
- Comparative analysis of routine parasitological methods for recovery of cysts, molecular detection, and genotyping of Giardia duodenalis.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2021Article
- Intestinal parasites among humans and their livestock animals in a rural community in Gharbia governorate, Egypt.Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2021Article
- Multilocus Genotyping ofPathogens (Basel, Switzerland) · 2021Article
- Epidemiology of Giardia duodenalis assemblages in Brazil: there is still a long way to go.Memorias do Instituto Oswaldo Cruz · 2021Review
- The Predominance of Giardia duodenalis AII sub-assemblage in young children from Salvador, Bahia, Brazil.Biomedica : revista del Instituto Nacional de Salud · 2020Article
- Prevalence and genotypic characterization ofFood and waterborne parasitology · 2020Article
- Identification of UncommonFrontiers in cellular and infection microbiology · 2020Article
- Genetic analysis of Giardia duodenalis isolates from children of low-income families living in an economically successful region in Southeastern Brazil.Revista do Instituto de Medicina Tropical de Sao Paulo · 2020Article
- Epidemiological distribution of genotypes of Giardia duodenalis in humans in Spain.Parasites & vectors · 2019Article
- Prevalence of intestinal parasites, with emphasis on the molecular epidemiology of Giardia duodenalis and Blastocystis sp., in the Paranaguá Bay, Brazil: a community survey.Parasites & vectors · 2018Article
- Persistent Occurrence ofFrontiers in microbiology · 2018Article
- Molecular Characterization of Giardia lamblia: First Report of Assemblage B in Human Isolates from Rio de Janeiro (Brazil).PloS one · 2016Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Giardia duodenalis is a common intestinal parasite infecting children attending daycare centres. This study aimed to verify Giardia occurrence and the genotypes of isolates infecting children aged 0-6 years and workers at a daycare centre in the state of São Paulo, Brazil. The families of children who tested positive for Giardia, were asked to provide stool samples from household members and their dogs. Samples (123 children, 14 centre employees, 44 household members, 19 children after treatment, and 20 dogs) were examined for intestinal parasites using concentration methods. DNA extracted from all samples was submitted for polymerase chain reaction (PCR) testing and the amplicons generated were used for multilocus sequence typing of beta-giardin (bg), triose phosphate isomerase (tpi) and glutamate dehydrogenase (gdh) genes. Giardia was detected in 15·9% and 28·6% of the 220 samples by microscopy and PCR, respectively. Analysis of sequences retrieved from 29 isolates revealed both assemblages A (31%) and B (69%). Sub-assemblages AII, BIII and BIV were identified and the alignment of the bg, gdh and tpi sequences revealed the presence of some single nucleotide polymorphisms, especially in assemblage B sequences. The higher predominance of assemblage B and the identification of the AII type support the view that anthroponotic transmission appears to be an important route of transmission in environments that concentrate children at an age when poor hygiene practices make them more vulnerable to such infection.
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