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3.
ABCS health sci ; 46: e021203, 09 fev. 2021. tab
Article in English | LILACS | ID: biblio-1147180

ABSTRACT

INTRODUCTION: The resistance of fungal species to drugs usually used in clinics is of great interest in the medical field. OBJECTIVE: To evaluate susceptibility and in vitro response of species of Trichophyton spp. to antifungal drugs of interest in clinical medicine. METHODS: 12 samples of clinical isolates from humans were used, nine of T. mentagrophytes and three of T. tonsurans. Susceptibility tests were performed according to the agar diffusion (AD) and broth microdilution (BM) methods. RESULTS: In the AD method, the species T. tonsurans presented a percentage of sensitivity of 33% in relation to amphotericin B and 66% to itraconazole, with 100% resistance to ketoconazole and fluconazole. T. mentagrophytes also showed 100% resistance to ketoconazole in this technique, with 11% sensitivity to ketoconazole, 22% to itraconazole and 22% of samples classified as sensitive dose dependent. In the MC method, the species T. tonsurans presented a sensitivity percentage of 66%, 55% and 33% in relation to ketoconazole, fluconazole and itraconazole, respectively. The T. mentagrophytes species presented sensitivity percentages of 11%, 11%, 33% and 55% for amphotericin B, itraconazole, ketoconazole and fluconazole, respectively. CONCLUSION: There was resistance in vitro of the species of T. mentagrophytes and T. tonsurans against the antifungal fluconazole and relative resistance against ketoconazole in the AD method. In BM, however, important percentages of sensitivity were observed for the two species analyzed in relation to the antifungals fluconazole and ketoconazole when compared to itraconazole and amphotericin B.


INTRODUÇÃO: A resistência de espécies fúngicas às drogas usualmente empregadas no meio clínico é motivo de grande interesse na área médica. OBJETIVO: Avaliar susceptibilidade e resposta in vitro de espécies de Trichophyton spp. a drogas antifúngicas de interesse em clínica médica. MÉTODOS: Foram utilizadas 12 amostras de isolados clínicos de humanos, sendo nove de T. mentagrophytes e três de T. tonsurans. Foram realizados testes de susceptibilidade segundo os métodos de difusão em ágar (DA) e microdiluição em caldo (MC). RESULTADOS: No método de DA, a espécie T. tonsurans apresentou percentual de sensibilidade de 33% em relação à anfotericina B e de 66% ao itraconazol, com 100% de resistência frente ao cetoconazol e ao fluconazol. A espécie T. mentagrophytes também apresentou 100% de resistência frente ao cetoconazol nesta técnica, com 11% de sensibilidade ao cetoconazol, 22% ao itraconazol e 22% das amostras classificadas como sensível dose dependente. No método de MC, a espécie T. tonsurans apresentou percentual de sensibilidade de 66%, 55% e 33% em relação ao cetoconazol, fluconazol e itraconazol, respectivamente. A espécie T. mentagrophytes apresentou percentuais de sensibilidade de 11%, 11%, 33% e 55% para anfotericina B, itraconazol, cetoconazol e fluconazol, respectivamente. CONCLUSÃO: Houve resistência in vitro das espécies do T. mentagrophytes e T. tonsurans frente ao antifúngico fluconazol e resistência relativa frente ao cetoconazol no método de DA. Na MC, no entanto, foram observados importantes percentuais de sensibilidade das duas espécies analisadas frente aos antifúngicos fluconazol e cetoconazol quando comparadas ao itraconazol e à anfotericina B.


Subject(s)
Trichophyton/drug effects , Microbial Sensitivity Tests , Drug Resistance, Fungal , Disease Susceptibility/microbiology , Antifungal Agents/pharmacology , Tinea/microbiology , Tinea/drug therapy , Colony Count, Microbial , Fluconazole/pharmacology , Amphotericin B/pharmacology , Itraconazole/pharmacology , Ketoconazole/pharmacology
4.
Rev. bras. anal. clin ; 45(1-4): 35-37, 2013. tab
Article in Portuguese | LILACS | ID: lil-748651

ABSTRACT

Espécies de Candida são responsáveis por cerca de 80% das infecções fúngicas no ambiente hospitalar. O objetivo do trabalho foi detectar a presença de espécies de Candida na urina de recém-nascidos [RNs] internados em Hospital Universitário. Foram coletadas cinquenta urinas de RNs e realizado exame direto com hidróxido de potássio a 20% e cultura em ágar de Sabouraud dextrosado. A identificação foi realizada através do sistema automatizado MicroScan®. Dos RNs analisados, 21 (42%) apresentaram positividade para candidíase. As espécies isoladas foram C. albicans, 8 (38,1%), C. tropicalis, 5 (23,8%), C. famata, 4 (19%), C. stellatoidea, 2 (9,5%), C. zeylanoides e C. catenulata, 1 (4,8%). Ao exame direto, houve positividade em 95% das amostras e em 100% das cultura. A mortalidade associada à candidíase foi de 9,5% em pacientes com baixo peso e idade gestacional inferior a 34 semanas. É indispensável a realização de estudos que contribuam para a valorização dosquadros de colonização por leveduras e que visem diminuir as taxas de infecção...


Subject(s)
Humans , Infant, Newborn , Candidiasis , Candida albicans/isolation & purification , Candida tropicalis/isolation & purification , Candida/isolation & purification , Mycoses , Infant, Newborn/urine , Urine/microbiology
5.
Braz. j. microbiol ; 42(3): 1151-1155, July-Sept. 2011. tab
Article in English | LILACS | ID: lil-607548

ABSTRACT

Normal fungal conjunctiva microbiota of horses remains stable in healthy animals, free from ocular and/or systemic diseases which may, eventually, cause ocular alterations. The knowledge of the fungal microbiota is of great importance due to the reduced number of studies reported in the literature and also to the large occurrence of ocular alterations, mainly keratomycosis, in these animals. The aim of this study was to isolate and to identify the fungi present in the ocular conjunctiva of healthy horses belonging to the Military Police Cavalry of Alagoas. Samples from both conjunctival sacks from 50 horses were taken using a sterile swab and submitted to fungal cultures. These samples were seeded by radial spreading of the swabs on the Sabouraud agar surface with chloramphenicol, at a concentration of 50mg/L, in Petri dishes. Next, dishes were incubated at room temperature (± 28ºC) for 15 days. Horses conjunctival fungal microbiota was found to be composed by Aspergillus spp. (62 percent), Microsporum gypseum (6 percent), Penicillium spp. (6 percent), Curvularia spp. (5 percent), Candida spp. (3 percent), Fusarium spp. (3 percent), Acremonium spp. (2 percent), Bipolaris sp. (1 percent), Cladosporium sp. (1 percent), Chrysosporium sp. (1 percent), Rhodotorula sp. (1 percent), Aureobasidium sp. (1 percent) and Scopulariopsis sp. (1 percent). There is a wide variety of yeast-like and filamentous fungi colonizing the clinically healthy horses' ocular conjunctiva, out of which Aspergillus sp. is predominant. Although this was a straightforward study and have not recorded any ocular lesions that suggest fungi infections, these fungi might eventually be involved in this type of ocular pathology for the studied species.


Subject(s)
Animals , Conjunctiva , Diagnostic Techniques and Procedures , Eye Infections, Fungal , Mycoses , Pathology, Veterinary , Horses , Methods , Methods
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