This could either have been
due to the absence of biologically active antifungal compounds
(Farnsworth and Bingel 1977, Gordon et al. 1980) or
due to the presence of growth factors in the methanolic
extract that stimulated the growth of fungi, negating the
effect of possible inhibitory substances that might have been
present (Ieven et al. 1979, Qasema and Abu-Blan 1996).