Occurrence of Bacillus cereus and Staphylococcus aureus organisms in some dairy desserts

الملخص EN

A total of 60 dairy desserts samples comprising ice cream, mehallabia and rice with milk (20 samples of each) were collected from different dairy shops and supermarkets in Assiut city, Egypt.

All samples were examined bacteriologicaly for isolation and enumeration of B.

cereus and Staph.

aureus organisms.

The incidences of B.

cereus in ice cream, mehallabia and rice with milk samples were 55, 60 and 15 %, and the average counts were 3.1 X 109, 1.07 X 1010 and 1.7 X 109 cfu / g food, respectively.

The incidence of Staph.

aureus in this study was 15 % for each of ice cream and rice with milk samples with average of 6.7 X 105 and 2.7 X 107 cfu / g food, respectively.

Staph.

aureus organisms could not be detected in all examined mehallabia samples in this study.

Staph.

aureus enterotoxins A and C were detected in some food positive samples for staphylococcal isolation.

The public health importance of the isolated organisms was also discussed.