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Effect of fungal extracts on encystment of soil amoebae



Effect of fungal extracts on encystment of soil amoebae



Protistologica 142: 121-123



Aqueous extract of fungi (Alternaria solani, A. brassicicola and Colletotrichum capsici were shown to cause good excystment of Shizopyrenus russelli and Hartmannella rhysodes showing common occurrence of excystment factors in microorganisms. Emetine hydrochloride (1/1000, weight/volume) in fungal extracts at pH 8.5 killed cysts of amoebae. At pH 6.2, emetine in fungal extracts had hardly any cysticidal effect, and fairly large numbers of the cysts readily excysted in Escherichia coli extract after the removal of emetine.

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