التأثير التضادي الحيوي بين البكتريا Bifidobacterium longum للعفن Aspergillus parasiticus و بعض أنواع البكتريا

الملخص EN

Bifidobacterium longum was isolated from the feces of newborn babies.

The bacteria was purified and identified through morphological and biochemical examinations.

The inhibitory effect of the bacterial culture filtrate against the growth of some pathogenic bacteria was studied using the inhibitory zone method.

Results showed that the culture filtrate caused inhibition of Staphylococcus aureus growth with a zone of 13 mm, while it was 12 mm for Bacillus subtilis in a zone of 12 mm.

However, the most resistant bacteria were Escherichia coli and Salmonella typhi as the zone of inhibition was 11 mm for both bacteria.

The effect of Bifidobacteriumlongum was also tested against the growth and aflatoxins production by the aflatoxigenic mold Aspergillus parasiticus in a liquid culture composed of MRS and corn extract.