The aminoglycoside, aminosidine exhibited ED(50)s of between 1 and 5 m
u M against the amastigotes of Leishmania major and Leishmania tropica
in mouse peritoneal macrophages whereas other strains causing New Wor
ld cutaneous leishmaniasis such as Leishmania braziliensis were more r
efractory. Aminosidine was also active against all but one of the Leis
hmania donovani strains tested and when combined with sodium stibogluc
onate, the drug showed marked potentiation against the amastigotes of
L. donovani in vitro and an additive effect in experimentally infected
BALB/c mice.