الفهرس | Only 14 pages are availabe for public view |
Abstract The aim of this study is to determine the possibility of transmission of Staphylococcus aureus, Streptococcus spp., Escherichia coli and Proteus spp. from biofilms formed on the surfaces of equipment and utensils used in small dairy shops to the final dairy products through bacteriological examination of 90 swabs which were collected from biofilms on the surfaces of equipment and utensils in small dairy shops from different localities at Port-said Governorate, Egypt, in addition to 45 of each commercial small scale yoghurt and rice with milk pudding samples collected from the same small dairy shops. The results showed that the mean values for Staphylococcus aureus counts were 4.7×10⁵±1.0×10⁵ cfu/g, 3.9×10⁵±8.8×10⁴ cfu/g and 9.4×10⁵±2.3×10⁵ cfu/g in swabs, yoghurt and rice with milk pudding samples, respectively, and The mean values for Streptococcus spp. were 2.2×10⁶±2.6×10⁵ cfu/g,1.4×10⁶±3.1×10⁵cfu/g and 3.2×10⁶±5.6×10⁵ cfu/g in swabs, yoghurt and rice with milk pudding samples, respectively, While the mean values of Escherichia coli were 1.7×10²±2.6×10¹ cfu/gm and 1.2×10²±3×10¹ cfu/g in swabs and yoghurt samples, respectively, with absence in examined rice with milk pudding samples. Proteus spp. couldn’t be detected in any examined samples. This may confirm cross-contamination from biofilms in equipment and utensils surfaces to yoghurt and rice with milk pudding as a final dairy product of small dairy shops. |