Diversity, seasonality, and antifungal susceptibility of yeasts in the public drinking water supply in a municipality of southeastern Brazil

Autor: Cláudia R. Rodrigues, Taiza Maschio-Lima, Maicon Henrique Caetano, Margarete Teresa Gottardo de Almeida, E. M. Castilho, Natalia Seron Brizzotti-Mazuchi, Mariela Domiciano Ribeiro, T. H. Lemes, Keith Cássia da Cunha, Bianca Gottardo de Almeida, João Paulo Zen Siqueira
Přispěvatelé: São José do Rio Preto School of Medicine (FAMERP), University Hospital of Geneva, Universidade Estadual Paulista (Unesp), SeMAE – Autonomous Municipal Water and Sewage Service
Rok vydání: 2020
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 1642-3593
DOI: 10.1016/j.ecohyd.2019.05.005
Popis: Made available in DSpace on 2020-12-12T02:05:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 The presence of microorganisms in potable water can alter its quality and cause public health issues when ingested or after contact with skin and mucous membranes, especially in individuals with impaired immune system. The aim of this study was to assess the occurrence and seasonality of potentially pathogenic yeast in the public water supply of a municipality in the state of São Paulo, Brazil. In addition, to evaluate the in vitro susceptibility profiles of the isolates against four antifungal drugs. Water samples (n = 1923) were collected from distinct points of the public water system, 15 days after the beginning of each climatic season. They were filtered through a cellulose membrane, which was subsequently upturned on an agar plate. Results show that 11.5% of the samples were positive for yeasts. After identification of the isolates, Rhodotorula minuta was the most prevalent in spring (48.6%), fall (35.2%), and summer (46.3%); and Candida spp. in winter (68.2%). Resistant phenotypes were observed in 54.2% of the isolates, mainly because of Rhodotorula spp. As conclusions, yeasts are present in the water supply during all seasons of the year with great species variability and significant rates of resistance. These results indicate a health concern, suggesting that water quality control protocols require changes to minimize exposure to potentially pathogenic microorganisms and selection of resistant strains. Department of Infectious Diseases São José do Rio Preto School of Medicine (FAMERP), Brigadeiro Faria Lima Av., 5416 Dermatology Laboratory University Hospital of Geneva, Street Gabrielle Perret-Gentil 4 Microbiology Post-Graduation Program Institute of Biosciences Humanities and Exact Sciences (Ibilce) São Paulo State University (UNESP), Cristóvão Colombo St., 2265 Capture/Quality Division SeMAE – Autonomous Municipal Water and Sewage Service, Antônio de Godoy St., 2181 Department of Molecular Biology São José do Rio Preto School of Medicine (FAMERP), Brigadeiro Faria Lima Av., 5416 Microbiology Post-Graduation Program Institute of Biosciences Humanities and Exact Sciences (Ibilce) São Paulo State University (UNESP), Cristóvão Colombo St., 2265
Databáze: OpenAIRE
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