Staphylococcus aureus, a Gram-positive bacterium, is often found in the nose and skin of humans. It causes various infections including pneumonia, gastroenteritis, and toxic shock syndrome, aided by its production of toxins and enzymes. Resistant strains like MRSA are prevalent. Prevention relies on hygiene practices, as vaccines are unavailable.
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Bacteriology
Baird–parker agar is a selective medium for the enumeration of Staphylococcus aureus in foods and this was first reported by Baird–Parker. Baird-Parker Agar was developed by Baird Parker in 1962. It is a selective medium for the detection and enumeration of coagulase-positive staphylococci from food samples. Baird-Parker agar is a type of agar used for
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Culture media, Food Microbiology
Catalase test is used to identify microorganisms that produce catalase enzyme. It is used to differentiate catalase-producing organisms (e.g. Staphylococcus species) from non-catalase producing bacteria (e.g. Streptococcus species). Catalase enzyme breakdown hydrogen peroxide (H2O2) to water and oxygen; and this leads to the release or production of bubbles – which indicates a positive test result
Coagulase test is used to distinguish pathogenic Staphylococcus aureus (which is coagulase positive) from nonpathogenic strains of S. aureus (which is coagulase negative). This test is used to differentiate Staphylococcus aureus (positive) from Coagulase Negative Staphylococcus (CONS). Coagulase is an enzyme produced by S. aureus that converts (soluble) fibrinogen in plasma to (insoluble) fibrin. Staphylococcus
