Incidence and public health imporiance of coliforms with special reference to enteropathogenic serotypes of escherichia coli in milk and some dairy products

Two hundred random samples of raw milk fresh kariesh cheese and yoghurt collected from dif- localities in Cairo and Giza were examined bac-teriologically for detection, isolation and identifi- cation of coliforms and serological typing of existingAll examined samples of raw milk proved to be contaminated with coliform organisms. The maximumcoliform content (MPN/100 ml) of examined samples was92 x 109, The m.i.n Lmum was 130, 3wi th a mean value of 148.28 x 108 + 110.62 x 108• Coliforms were present in 96% of examined cream S~ples, the maximum MPN/l00 ml was 16 X 1014,the mini-3 12 m~ was 33 x 10 , with a mean value of 164.43 x 10 + 12 67.01 xExamination of kariesh cheese revealed detection of coliform organisms in 82% of the examined samples. The maximum MPN/l00 g was 16 x 1010, the minimum was 1) x 102, with a mean value of 16.392 x 109+ 9.590xl09•Only 10 out of 50 samples of yoghurt were found to be contaminated with coliforms, with a count (MPN/1QOg)