Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/11013
Title: Environmental Isolation of VGII from Indoor Dust from Typical Wooden Houses in the Deep Amazonas of the Rio Negro Basin
Authors: Santos, Fabio Brito
Barbosa, Glaucia Gonçalves
Trilles, Luciana
Nishikawa, Marília Martins
Wanke, Bodo
Meyer, Wieland
Costa, Filipe Anibal Carvalho
Lazera, Márcia dos Santos
Affilliation: Fundação Oswaldo Cruz. Instituto Evandro Chagas. Laboratório de Micologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Evandro Chagas. Laboratório de Micologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Evandro Chagas. Laboratório de Micologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Nacional de Controle de Qualidade em Saúde. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Evandro Chagas. Laboratório de Micologia. Rio de Janeiro, RJ, Brasil./The University of Sydney. Marie Bashir Institute for Infectious Diseases and Biosecurity. Sydney Medical School-Westmead Hospital. New South Wales, Australia.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Epidemiologia Molecular e Sistemática. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Evandro Chagas. Laboratório de Micologia. Rio de Janeiro, RJ, Brasil.
Abstract: Cryptococcosis is a human fungal infection of significant mortality and morbidity, especially in the meningoencephalitis form. Cryptococcosis is distributed worldwide and its agents, C. neoformans and C. gattii, present eight major molecular types—VNI-VNIV and VGI-VGIV respectively. The primary cryptococcosis caused by molecular type VGII (serotype B, MATalpha) prevails in immunocompetent patients in the North and Northeast of Brazil, revealing an endemic regional pattern to this molecular type. Since 1999, C. gattii VGII has been involved in an ongoing outbreak in Canada, and is expanding to the Northwest of the United States, two temperate regions. Exposure to propagules dispersed in the environment, related to various organic substrates, mainly decomposing wood in and around dwellings, initiates the infection process. The present study investigated the presence of the agents of crypto-coccos is in dust from dwellings in the upper Rio Negro, municipality of Santa Isabel do Rio Negro in Amazonas state. Indoor dust was collected from 51 houses, diluted and plated on bird seed agar. Dark brown colonies were identified phenotypically, and genotypically byURA5 restriction fragment length polymorphism analysis and multilocus sequence typing(MLST). The mating type was identified using pheromone-specific primers. Three of the 51houses were positive for C. gattii molecular type VGII,MATα and MATa, showing a high prevalence of this agent. MLST studies identified eight subtypes, VGIIb (ST7), VGIIa (ST20),(ST5) and 5 new subtypes unique to the region. For the first time in the state of Amazonas, C. gattii VGIIMATα and MATa were isolated from the environment and correlates with endemic cryptococcosis in this state. This is the first description of MLST subtypes on environ-mental isolates in the Brazilian Amazon, indicating domiciliary dust as a potential source for human infection with different subtypes of C. gattii VGIIMATα and MATa.
Keywords: Fungi
Cryptococcus gattii
Mycological Typing Techniques
Mycology
keywords: Fungos
Cryptococcus gattii
Técnicas de Tipagem Micológica
Micologia
DeCS: Fungos
Cryptococcus gattii
Técnicas de Tipagem Micológica
Micologia
Issue Date: 2015
Publisher: PLOS One
Citation: SANTOS, Fabio Brito et al. Environmental isolation of Cryptococcus gattii VGII from indoor dust from typical wooden houses in the deep Amazonas of the Rio Negro basin. PLOS One, v. 10, n. 2, e0115866.
DOI: 10.1371/journal.pone.0115866
ISSN: 1932-6203
Copyright: open access
Appears in Collections:INCQS - Artigos de Periódicos

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