Enzymatic and hemolytic activity in different Candida species.

Autor: Riceto ÉB; Curso de Ciências Biológicas, Instituto de Biologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil; Curso Técnico em Análises Clínicas, Escola Técnica de Saúde, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil., Menezes Rde P; Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil; Curso Técnico em Análises Clínicas, Escola Técnica de Saúde, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil., Penatti MP; Curso Técnico em Análises Clínicas, Escola Técnica de Saúde, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil., Pedroso Rdos S; Curso Técnico em Análises Clínicas, Escola Técnica de Saúde, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil. Electronic address: rpedroso@estes.ufu.br.
Jazyk: angličtina
Zdroj: Revista iberoamericana de micologia [Rev Iberoam Micol] 2015 Apr-Jun; Vol. 32 (2), pp. 79-82. Date of Electronic Publication: 2014 Apr 01.
DOI: 10.1016/j.riam.2013.11.003
Abstrakt: Background: Candida species, in conditions of microbiota imbalance or decreased immune defenses, may be one of the main human fungal pathogens. Virulence factors constitute the mechanisms used by the fungus to avoid host defenses.
Aims: This study aimed to investigate the in vitro production of virulence factors, such as hemolytic activity, and deoxyribonuclease (DNase), proteinase, and phospholipase activities in Candida spp.
Methods: Fifty clinical isolates were analyzed for virulence factors: Candida albicans (15), Candida tropicalis (15), Candida parapsilosis (10), Candida glabrata (5), and Candida krusei (5). Hemolytic activity was determined in Sabouraud dextrose agar plates containing 3% glucose and 7% sheep red cells. Culture media containing, respectively, agar-base DNA, egg yolk, and bovine albumin were used to determine DNase, phospholipase and proteinase activities, respectively.
Results: Forty-eight (96%) of 50 isolates showed hemolytic activity, with 10 (20%) positive for DNase, 19 (38%) for proteinase, and 16 (32%) for phospholipase. Statistically significant differences were observed between species for phospholipase (p<0.0001) and proteinase (p<0.05) production.
Conclusions: It is concluded that all species had hemolytic activity. DNase activity was detected in all species except in C. glabrata; proteinase activity was detected in C. albicans, C. tropicalis, and C. parapsilosis; and phospholipase activity was observed in C. albicans and C. tropicalis.
(Copyright © 2012 Revista Iberoamericana de Micología. Published by Elsevier Espana. All rights reserved.)
Databáze: MEDLINE
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