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Brazilian Journal of Pharmaceutical Sciences

versão On-line ISSN 2175-9790


TAIRA, Cleison Ledesma; MOTA, Valdeci Aparecido  e  SVIDZINSKI, Terezinha Inez Estivalet. Virulence potential of filamentous fungi isolated from poultry barns in Cascavel, Paraná, Brazil. Braz. J. Pharm. Sci. [online]. 2011, vol.47, n.1, pp.155-160. ISSN 2175-9790.

Opportunistic fungi are those that normally would not cause diseases in otherwise healthy people, but are able to cause problems under some circumstances, and for this they need to possess a certain virulence potential. The objective of this study was to identify samples of filamentous fungi isolated from poultry barns in Cascavel, Paraná, and also to evaluate their virulence potential by assessing proteinase production, hemolytic activity, urease production, and growth rate at 37 ºC. We have evaluated the following samples: Acremonium hyalinulum (1 sample), Aspergillus sp. (12), Beauveria bassiana (1), Curvularia brachyspora (1), Paecilomyces variotti (1), and Penicillium sp. (2). Out of the 18 samples analyzed, 44.4% showed proteolytic activity using albumin as the substrate versus 66.7% when using casein; 66.7% showed hemolytic activity, 83.3% were positive for urea, and 88.9% grew at a temperature of 37 ºC. The results demonstrated that the majority of the isolates expressed virulence factors. Therefore, these isolates have the potential to harm human hosts, such as those working at poultry barns, especially predisposed or susceptible individuals.

Palavras-chave : Filamentous fungi [identification]; Filamentous fungi [virulence potential]; Filamentous fungi [enzymatic activity]; Filamentous fungi [hemolytic activity].

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