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17 Ιουλ 2023 · These organisms can grow aerobically or anaerobically (facultative) and at temperatures between 18 C and 40 C. Typical biochemical identification tests include catalase positive (all pathogenic Staphylococcus species), coagulase positive (to distinguish Staphylococcus aureus from other Staphylococcus species), novobiocin sensitive (to ...
15 Απρ 2024 · Staphylococcus aureus is a leading cause of community-acquired and hospital-acquired bacteremia. Issues related to clinical manifestations of S. aureus infection are discussed separately. (See "Clinical manifestations of Staphylococcus aureus infection in adults".)
Staphylococcus aureus is a major human pathogen that causes a wide range of clinical infections. It is a leading cause of bacteremia and infective endocarditis as well as osteoarticular, skin and soft tissue, pleuropulmonary, and device-related infections.
Other infections require samples of blood or infected fluids, which are sent to a laboratory to grow (culture), identify, and test the bacteria. Laboratory results confirm the diagnosis and determine which antibiotics can kill the staphylococci (called susceptibility testing).
Catalase test: Positive. Coagulase test: Positive- Distinguish S. aureus from coagulase-negative Staphylococcus aureus (CONS). CONS are further differentiated on the basis of novobiocin sensitivity test ( S. epidermidis is sensitive, whereas S. saprophyticus is resistant).
S. aureus also produces catalase; when applied to colony material, the catalase test is a rapid, useful test to distinguish staphylococci from other Gram-positive bacteria such as streptococci. S. aureus is a facultative anaerobe that grows by aerobic respiration or by fermentation, which yields principally lactic acid.
Blood cultures may be positive for staphylococcal species, even when results from other cultures are negative. Obtain blood cultures from all patients with serious infections. Deck et al have...
