Avaliação da criptocococe experimental sistêmica em camundongos BALB/c e terapêutica com anfotericina B, fluconazol e associação. / Evaluation of experimental systemic cryptococcosis in BALB/c mice, and its treatment with amphotericin B and fluconazole, alone and in association.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Clinical cryptococcosis was observed on day 1 postinoculation (PI), and the animals survived until day 15 PI. C. neoformans was isolated from brain tissue starting on day 5 PI, and from lung tissue starting on day 11 PI. On day 1 PI, signs of infection were already observed in brain tissue, with presence of edema, which evolved throughout the period. C. neoformans was first seen in the capillaries, suggesting that this is an important route for the entrance of the yeast into this organ. Acute meningitis occurred around day 7 PI, when the microorganism was observed in the meninges, along with a discrete inflammatory infiltrate. From day 13 PI onward the disease became chronic, persisting until the death of the animals. Treatment with amphotericin B (AMB) alone shortened the animalssurvival, while treatment with fluconazole (FLC) alone lengthened it. Treatment with the two drugs in association was effective when treatment was begun at 24 hours PI, however, when treatment was begun at day 7 PI, already with signs of acute meningitis, the effectiveness was unsatisfactory. It is important to emphasize that these results relate to inoculation with an isolate susceptible in vitro to fluconazole, while the treatment was not effective for an isolate resistant in vitro to fluconazole.

ASSUNTO(S)

monoterapia. amphotericin b associação terapêutica therapêutic association cryptococcus neoformans fluconazol criptococose experimental monotherapy cryptococcus neoformans experimental cryptococcosis anfotericina b fluconazole

ACESSO AO ARTIGO

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