ArticleMemorias do Instituto Oswaldo Cruz2022
Giardiasis in urban and rural Amazonas, Brazil is driven by zoonotic and cosmopolitan A and B assemblages.
Article in Memorias do Instituto Oswaldo Cruz, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 9 citations in OpenAlex.
- Intestinal parasites infecting free-ranging primates in Colombia: Morphological and molecular evidence.International journal for parasitology. Parasites and wildlife · 2025Article
- Zoonotic assemblages A and B ofOne health (Amsterdam, Netherlands) · 2024Article
- Zoonotic Giardia duodenalis assemblage A in northern sloth from Brazilian Amazon.Memorias do Instituto Oswaldo Cruz · 2023Article
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8 authors at 3 institutions in 3 countries.
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Abstract
backgroundGiardia duodenalis is a protozoan parasite that infects humans and other mammals and causes giardiasis worldwide. Giardia is genotyped into eight assemblages (A-H), with assemblages A and B considered zoonotic.
objectivesThe aim of this study was to determine the assemblages of G. duodenalis from individuals living in rural and urban areas of the Amazonas State.
methods103 human faecal specimens microscopically positive for the presence of Giardia obtained from four municipalities in Amazonas and four animal faecal specimens were genotyped based on the sequences of two genes, triosephosphate isomerase (TPI) and β-giardin (BG).
findingsIn humans, assemblage A was the most represented with the identification of sub-assemblages AI, AII and AIII based on BG and sub-assemblages AI and AII based on TPI. Similarly, there is a diversity of sub-assemblage B considering BG (B and BIII) and TPI (B, BIII and BIV). In addition, we characterised homogeneous and heterogeneous genotypes comprising assemblages/sub-assemblages A and B in individuals from urban and rural areas. Here, for the first time, it was genotyped Giardia that infects animals from the Brazilian Amazon region. We identified sub-assemblage AI in one Ateles paniscus and two Felis catus and sub-assemblage BIV in one Lagothrix cana. MAIN
conclusionsTherefore, humans and animals from the urban and rural Amazon share Giardia genotypes belonging to assemblages A and B, which are found in cosmopolitan regions around the world.
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