ABSTRACT
The human mutilating disease chromoblastomycosis is caused by melanized members of the order Chaetothyriales. To assess population diversity among 123 clinical strains of agents of the disease in Brazil we applied sequencing of the rDNA internal transcribed spacer region, and partial cell division cycle and ß-tubulin genes. Strains studied were limited to three clusters divided over the single family Herpotrichiellaceae known to comprise agents of the disease. A Fonsecaea cluster contained the most important agents, among which F. pedrosoi was prevalent with 80% of the total set of strains, followed by 13% for F. monophora, 3% for F. nubica, and a single isolate of F. pugnacius. Additional agents, among which two novel species, were located among members of the genus Rhinocladiella and Cyphellophora, with frequencies of 3% and 1%, respectively.
Subject(s)
Humans , Disease , ChromoblastomycosisABSTRACT
In this study, we isolated and phenotypically identified 108 yeast strains from various clinical specimens collected from 100 hospitalized patients at three tertiary hospitals in São Luís-Maranhão, Brazil, from July to December 2010. The isolates were analyzed for their susceptibility to four of the most widely used antifungal agents in the surveyed hospitals, amphotericin B, fluconazole, 5-flucytosine and voriconazole. The species identified were Candida albicans (41.4%), Candida tropicalis (30.1%), C. glabrata (7.4%), Candida parapsilosis (5.5%), Candida krusei (4.6%), Cryptococcus neoformans (4.6%), Trichosporon spp. (3.7%), Candida norvegensis (0.9%), Rhodotorula glutinis (0.9%) and Pichia farinosa (0.9%). A higher isolation rate was observed in the following clinical specimens: urine (54 isolates; 50%), respiratory tract samples (21 isolates; 19.4%) and blood (20 isolates; 18.6%). Candida albicans isolates were 100% sensitive to all antifungal agents tested, whereas Candida krusei and Crytococcus neoformans displayed intermediate resistance to 5-flucytosine, with Minimal Inhibitory Concentration (MIC) values of 8 mg/mL and 16 mg/mL, respectively. Both strains were also S-DD to fluconazole with an MIC of 16 mg/mL. C. tropicalis was resistant to 5-flucytosine with an MIC of 32 μg/mL. This study demonstrates the importance of identifying the yeast species involved in community and nosocomial infections.
Subject(s)
Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Candida/isolation & purification , Mycoses/microbiology , Pichia/isolation & purification , Rhodotorula/isolation & purification , Trichosporon/isolation & purification , Antifungal Agents/pharmacology , Brazil , Candida/drug effects , Microbial Sensitivity Tests , Mycoses/epidemiology , Prevalence , Pichia/drug effects , Rhodotorula/drug effects , Tertiary Care Centers , Trichosporon/drug effectsABSTRACT
As entomoftoromicoses constituem entidade clínica pertencente ao grupo das zigomicoses, cujos agentes etiológicos são o Conidiobolus coronatus, Conidiobolos incongruus e o Basidiobolos ranarum. Um caso de entomoftoromicose cutâneo-mucosa é descrito em homem de 51 anos de idade, lavrador, procedente da região amazônica do Estado do Maranhão, Brasil. Teve diagnóstico esclarecido por exame anatomopatológico, um ano após as manifestações clínicas iniciais. Como tratamento utilizou-se um dos derivados imidazólicos (cetoconazol®) 400mg/dia divididos em duas tomadas, por 12 meses), mostrando boa tolerância, com resposta favorável. Na última avaliação, 24 meses após início do tratamento, encontrava-se clinicamente curado.