Malassezia pachydermatis is associated with dermatomycoses and otomycosis in dogs and cats. This study compared the susceptibility of M. pachydermatis isolates from sick (G1) and healthy (G2) animals to azole and polyene antifungals using the M27-A3 protocol. Isolates from G1 animals were less sensitive to amphotericin B, nystatin, fluconazole, clotrimazole and miconazole.
Fusarium spp is an opportunistic fungal pathogen responsible for causing invasive hyalohyphomycosis in immunocompromised patients. Due to its susceptibility pattern with a remarkable resistance to antifungal agents the treatment failures and mortality rates are high. To overcome this situation, combination therapy may be considered which must be subjected to in vitro tests. In vitro activities of amphotericin B, itraconazole, and voriconazole associated with azithromycin, ciprofloxacin, fluvastatin, ibuprofen, metronidazole, and also the combination of amphotericin B plus rifampin against 23 strains of Fusarium spp. through the checkerboard technique based on M38-A2 [Clinical and Laboratory Standards Institute (2008). Reference method for broth dilution antifungal susceptibility testing of filamentous fungi; approved standard, 2nd ed. (CLSI document M38-A2) (ISBN 1-56238-668-9). Wayne, PA: CLSI] were evaluated. The best synergistic interactions with amphotericin B were with ibuprofen (43.5%) (FICI [fractional inhibitory concentration index] range = 0.25-2). Combinations with voriconazole showed synergism, mainly with ciprofloxacin (30.4%) (FICI range = 0.25-3) and metronidazole (30.4%) (FICI range = 0.1-4); however, all the combinations with itraconazole were indifferent. In general, antagonistic interactions were not registered. Our results showed that in vitro synergisms obtained by some combinations studied deserve attention since they were better than those showed by the antimycotic.
O presente trabalho descreve a avaliação da atividade antioxidante e o doseamento de polifenóis totais das frações acetato de etila (AcOEt) e diclorometano (CH2Cl2) das folhas de Ipomoea cairica L. Sweet, uma planta pertencente à família Convolvulaceae. Essa espécie é conhecida popularmente como corda-de-viola e é utilizada na medicina popular brasileira, como anti-inflamatório e antirreumático. A atividade antioxidante foi determinada pelo método do DPPH e cada fração teve o IC50 calculado. O IC50 apresentou valores de 43,06 μg/mL para a fração CH2Cl2 e de 45,43μg/mL para a fração AcOEt. O conteúdo de polifenóis foi determinado através da utilização dos padrões de ácido pirogálico e ácido gálico. Nesse trabalho não foi possívelestabelecer uma relação positiva entre a quantidade de compostos fenólicos e a atividade antioxidante desempenhada pelas frações acetato de etila e diclorometano, uma vez que ambas apresentaram comportamentos semelhantes frente ao DPPH, mas distintos na quantificação de compostos fenólicos.Palavras-chave: Ipomoea cairica, corda-de-viola, DPPH,atividade antioxidante, compostos fenólicos, folhas.
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