Molecular identification of isolated strains S. aureus (MRSA) in some dairy products

Methicillin-resistant Staphylococcus aureus (MRSA) is a type of S. aureus that developed resistance against certain antibiotics called beta-lactams like methicillin and other more common antibiotics such as penicillin, oxacillin, and amoxicillin (CDC, 2019b) . CDC estimated 80,461 invasive MRSA infections and 11,285 related deaths occurred in the United States in 2011 (CDC, 2013) . The existence of MRSA in dairy products Two hundred from different dairy products samples (Kareish cheese, Damietta cheese, plain yogurt, and ice cream) were collected randomly from supermarkets, small dairies and street-vendors at Alexandria City, Egypt. (50 of each) were examined for this purpose molecular detection of determinant genes of S. aureus (23S rRNA), MRSA (mecA), Quantitative detection Enterotoxins in examined samples. The result given revealed that 16% (4/25) of examined street-vendor and supermarket Kareish cheese is contained MRSA. All examined Damietta cheese samples were proved 4% (1/25) of examined Damietta cheese samples was contaminated by MRSA. All examined yoghurt samples were proved 4% (1/25) of examined yoghurt samples was contaminated by MRSA. The results of nucleotide sequencing S. aureus were accepted and received accession numbers from Gen Bank are (MW256756), (MW256757), (MW256758), (MW256759), (MW256760) and (MW256761).