Eduardo M. Netto; Cesar C. Cuba; Philip D. Marsden; Air C. Barretto
RESUMEN
Comparamos diferentes medios artificiales y procedimientos de cultivo in vitro de Leishmania braziliensis braziliensis (Lbb) aislada de lesiones de hamsteres experimentalmente infectados. Observamos que la aspiración de material de la lesión, usando jeringa de 5 mlyaguja 22g(25 x 8mm), mostró resultados satisfactorios siendo un procedimiento conveniente de colecta. El medio de Agar Sangre Difco (DAB) es un medio eficiente para el aislamiento de Lbb. El medio de Evans demostro similares resultados al DAB, mientras que el medio líquido de Schneider y el químicamente definido AR-103 fueron nitidamente inferiores.
En la propagación in vitro de Lbb, el medio de Schneider permitió un buen crecimiento del flagelado, alcanzando densidades de 0,21 – 2,57 x 108 promastigotes por ml ya, en el 5.° dia de cultivo. La adición de 5-fluorocytosine a los tubos de cultivo (150/jg/ml)para evitar la contaminación por hongos, no inhibió el crecimiento de Lbb.
Palabras-clave: Leishmania braziliensis braziliensis. Cultivo in vitro.
ABSTRACT
We have compared differeni media and isolation procedures to cultivate Leishmania braziliensis braziliensis/rom hamster tissues. Wefmd that aspiration of the lesion using a 22 g needle and a five ml syringegives satisfactorv results, and is a convenient sampling method. Difco Blood agar is an efficient medium for isolation. Evans medium gave equal results while Schneiders and AR-103 medium were inferior. In Schneider’s medium flagellate growth achieved 0.21 – 2.57 x 108 promastigotes/ml bv the fifth day 5-fluorocytosine added to the cultures to avoid fungal contamination does not inhibit the growth of L. b. brasiliensis.
Keywords: Leishmania braziliensis braziliensis. Culture in vitro.
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Recebido para publicação em 18/9/1985.
Núcleo de Medicina Tropical e Nutrição, Universidade de Brasília. 70910 – Brasília, DF.
Pesquisa financiada parcialmente pelo RE-GRANT 820526 WHO/TDR e CNPq. United States Public Service Grant(AI/16282-04), Department of International Medicine Cornell Medical College. New York.
