3/13/2016 Characteristics of the Organism Characteristics of the Organism Animals may also be sources 5.aureus is present in many food types -Mastitis(infection of cow teats)is a -Various meat products serious problem for the dairy -Various fish products industry Bovine mastitis is the single most -Assorted cream pies costly agricultural disease in the US Tuna pot pies -Mastitis is a public health concern as Deli salads bacteria can contaminate milk and Bacterial load is usually low<100 CFU/g dairy products Bacteria can grow to>106 CFU/g Controlled by strict hygiene Characteristics of the Organism Characteristics of the Organism Resistance to Adverse Environmental As there are so many human and animal Conditions reservoirs,controlling staphylococcal infections is challenging Unique resistance to inhibitors ·Grows with high salt Grows with low water activity of 0.86 under aerobic conditions (anaerobic 0.90) cured meats -puddings -sauces3/13/2016 5 Characteristics of the Organism • Animals may also be sources - Mastitis (infection of cow teats) is a seri bl f th d i ious problem for the dairy industry - Bovine mastitis is the single most costly agricultural disease in the US - Mastitis is a public health concern as bacteria can contaminate milk and dairy products - Controlled by strict hygiene Characteristics of the Organism • S. aureus is present in many food types - Various meat products - Various fish products - Assorted cream pies - Tuna pot pies - Deli salads • Bacterial load is usually low < 100 CFU/g • Bacteria can grow to > 106 CFU / g Characteristics of the Organism • As there are so many human and animal reservoi t lli t h l l irs, controlling staphylococcal infections is challenging Characteristics of the Organism Resistance to Adverse Environmental Conditions • Unique resistance to inhibitors • Grows with high salt • Grows with low water activity of 0.86 under aerobic conditions (anaerobic 0.90) Mannitol Salt Agar - cured meats - puddings - sauces Mannitol Salt Agar