INTRODUCTION: Cryptococcus neoformans is an encapsulated yeast and is the etiological agent for human and animal cryptococcosis. It is found in sources within the environment, including pigeon excrement, and is an important cause of mortality among immunocompromised individuals worldwide. METHODS: Seventy different environments in the city of Pelotas, Rio Grande do Sul, were surveyed for the purpose of investigating Cryptococcus neoformans occurrences in pigeon excreta. The environments included buildings, public squares and outdoor locations in the city. After collection, chloramphenicol saline solution was added to the excreta, which were then homogenized and seeded onto Sabouraud agar with chloramphenicol and onto Niger agar, and incubated at 32 degrees C. Identification was performed by direct examination and by means of the phenoloxidase and urease tests, carbohydrate assimilation and culturing in CGB medium. RESULTS: Out of the sites investigated (n = 70), 26 (37.1%) of them contained pigeon excreta. These included historical buildings (n = 8), a church tower (n = 1), rice mills and warehouses (n = 7), a public square (n = 1) and outdoor locations (n = 9). Cryptococcus neoformans was isolated from 26.9% (n = 7/26) of these locations. CONCLUSIONS: This study draws attention to isolation of this fungus in urban areas that present large accumulations of pigeon excrement. This represents a risk to public health, especially for immunocompromised individuals.
INTRODUCTION:Cryptococcus neoformans is an encapsulated yeast and is the etiological agent for human and animal cryptococcosis. It is found in sources within the environment, including pigeon excrement, and is an important cause of mortality among immunocompromised individuals worldwide. METHODS: Seventy different environments in the city of Pelotas, Rio Grande do Sul, were surveyed for the purpose of investigating Cryptococcus neoformans occurrences in pigeon excreta. The environments included buildings, public squares and outdoor locations in the city. After collection, chloramphenicol saline solution was added to the excreta, which were then homogenized and seeded onto Sabouraud agar with chloramphenicol and onto Niger agar, and incubated at 32 degrees C. Identification was performed by direct examination and by means of the phenoloxidase and urease tests, carbohydrate assimilation and culturing in CGB medium. RESULTS: Out of the sites investigated (n = 70), 26 (37.1%) of them contained pigeon excreta. These included historical buildings (n = 8), a church tower (n = 1), rice mills and warehouses (n = 7), a public square (n = 1) and outdoor locations (n = 9). Cryptococcus neoformans was isolated from 26.9% (n = 7/26) of these locations. CONCLUSIONS: This study draws attention to isolation of this fungus in urban areas that present large accumulations of pigeon excrement. This represents a risk to public health, especially for immunocompromised individuals.
Authors: Josiara Furtado Mendes; Ana Paula Neuschrank Albano; Marco Antônio A Coimbra; Gracialda Ferreira de Ferreira; Carolina Lambrecht Gonçalves; Patrícia da Silva Nascente; João Roberto Braga de Mello Journal: Rev Inst Med Trop Sao Paulo Date: 2014 Nov-Dec Impact factor: 1.846
Authors: F P Gullo; S A Rossi; J de C O Sardi; V L I Teodoro; M J S Mendes-Giannini; A M Fusco-Almeida Journal: Eur J Clin Microbiol Infect Dis Date: 2013-07-04 Impact factor: 3.267
Authors: Diniz P Leite; Janaina V R S Amadio; Evelin R Martins; Sara A A Simões; Ana Caroline A Yamamoto; Fábio A Leal-Santos; Doracilde T Takahara; Rosane C Hahn Journal: J Occup Med Toxicol Date: 2012-06-08 Impact factor: 2.646