Prevalence of both Streptococcus agalactiae and Staphylococcus aureus isolated from raw milk and soft cheese

A total of 125 random samples of raw milk and soft cheese [25 each] of cow's milk, sheep's milk, goat's milk, kareish cheese and Domiati cheese samples were collected from different markets and shops in Alexandria city, Egypt and examined for the presence of Staphylococcus aureus and Streptococcus agalactiae as food poisoning and mastitis causing organisms. The incidence of Staphylococcus aureus in examined samples were 28, 36, 40, 20 and 16% in the Streptococcus agalactiae was detected in 16, 20, 24, 12 and 4% of the examined samples, respectively. Streptococcus agalactiae was identified using primers V1 and V2, specific to rRNA as an early diagnosis of subclinical mastitis using, PCR technique. The sanitary and public health importance of these organisms as well as control measures to improve the quality of dairy products and to safeguard the consumers from infection were discussed

Quality assessment of sweetened condensed and evaporated milks in Alexandria governorate [with 4 tables]

Concentrated milk is extensively imported from different countries abroad. These products, with their greater concentration of milk solids are useful in the manufacture of ice cream, candies, and a variety of other food items. Forty random samples of concentrated milk [20 each of sweetened condensed and evaporated milks] of different brands were collected from large supermarkets in Alexandria Governorate. All examined concentrated milk samples were subjected to the physical and organoleptic evaluation. The mean values of total solids, fat, sucrose contents and sugar/water ratio in the examined sweetened condensed milk samples were 30.4 +/- 0.31; 9.18 +/- 0.11; 43.93 +/- 0.54 and 62.94 +/- 0.43, respectively. While, the mean values of total solids and fat content in examined evaporated milk samples were 23.17 +/- 1.64 and 8.54 +/- 0.12, respectively. The mean values of aerobic plate count, anaerobic plat count in the examined sweetened condensed milk and evaporated milk samples were 3.05x10[2] +/- 1.07x10 and 2.33x10 +/- 0.88x10; 1.1x10[2] +/- 9.4x10 and 1.33x10 +/- 0.33x10 cfu/g, respectively. Enterococci contaminated 25% of the examined sweetened condensed milk samples with varying numbers. Osmophilic fungi were found in 25% of examined sweetened condensed milk samples with a mean value of 6.44x10 +/- 2.7x10. While, the mean value of total yeast and mould count in examined evaporated milk was 0.95x10 +/- 0.25x10 cfu/g. Bacillus cereus contaminated 20% of examined condensed milk samples with a mean value of 8.75x10 +/- 7.0x10. Salmonellae, Coliforms and Clostridium perfringens failed to be detected in the examined samples of concentrated milk. The public health, economic importance of the isolated species and suggested control measure were discussed