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  • Title: Molecular detection of Histoplasma capsulatum in bats of the Amazon biome in Pará state, Brazil.
    Author: da Silva JA, Scofield A, Barros FN, de Farias DM, Riet-Correa G, Bezerra Júnior PS, Santos TFS, Tavares GSF, Trevelin LC, da Paz GS, Cerqueira VD.
    Journal: Transbound Emerg Dis; 2021 Mar; 68(2):758-766. PubMed ID: 32686315.
    Abstract:
    Histoplasma capsulatum, the fungus causing histoplasmosis, has a strong impact on public health. Histoplasmosis is one of the most prevalent systemic mycoses in the Americas and occurs in several mammalian species. Bats are important in the epidemiological cycle of histoplasmosis because they disseminate the fungus throughout the environment. The aim of the present study was to investigate natural H. capsulatum infection in bats located in forested areas, which have undergone anthropogenic perturbations, as well as in the urban areas of the state of Pará. Twenty-two species of bats were captured in 18 municipalities of Pará; the samples obtained from these animals were subjected to nested PCR for amplification of H. capsulatum DNA. The HCI/HCII and HCIII/HCIV primers were used, and the final 210-pb fragment was amplified. Of the 100 bats analysed, two were confirmed to be positive for H. capsulatum. Samples amplified by nested PCR were sequenced and found to share identity and have 100% match with H. capsulatum DNA. H. capsulatum was detected in the area of study: the state of Pará has a wide diversity of bat species, and the region under investigation is situated in the north of the state, which suffers the most severe environmental and climatic changes. Therefore, it is essential to elucidate the distribution of H. capsulatum hosts in this region to facilitate the implementation of effective disease surveillance.
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