What hemolysis does S. aureus have?

S. aureus produces at least four hemolytic activities, α, β, δ, and γ. α-Hemolysis generates a wide zone of complete hemolysis with blurred edges on sheep blood agar (SBA). β-Hemolysis produces a wide zone of incomplete hemolysis with sharp edges.

What is the colony morphology of S. aureus?

S. aureus is a facultatively anaerobic, Gram-positive coccus, which appears as grape-like clusters when viewed through a microscope, and has round, usually golden-yellow colonies, often with hemolysis, when grown on blood agar plates.

What test is used to confirm S. aureus?

tube coagulase test
Coagulase testing is the single most reliable method for identifying Staphylococcus aureus [9]. Coagulase production can be detected using either the slide coagulase test (SCT) or the tube coagulase test (TCT).

What are the pathogenic properties of S. aureus?

Pathogenesis of S. It causes superficial skin lesions such as boils, styes and furuncules; more serious infections such as pneumonia, mastitis, phlebitis, meningitis, and urinary tract infections; and deep-seated infections, such as osteomyelitis and endocarditis.

Is Staphylococcus aureus beta or alpha hemolytic?

Staphylococcus aureus is a common pathogen causing both hospital and community-acquired infections. Hemolysin is one of the important virulence factors for S. aureus and causes the typical β-hemolytic phenotype which is called complete hemolytic phenotype as well.

Is Staph aureus non hemolytic?

Staphylococcus species are either beta hemolytic or gamma (not hemolytic). Staph aureus produces alpha toxin which typically causes wide zones of beta (complete) hemolysis.

What is an identifying feature of Staphylococcus aureus?

S. aureus cells are Gram-positive and appear in spherical shape. They are often in clusters resembling bunch of grapes when observed under light microscope after Gram staining.

Which of the biochemical tests are the 3 most important in the identification of Staphylococcus aureus?

Tests for clumping factor, coagulase, hemolysins and thermostable deoxyribonuclease are routinely used to identify S aureus. Commercial latex agglutination tests are available.

Which characteristics are characteristic of pathogenic staphylococci?

Characteristics. Staphylococci are Gram-positive, nonspore forming, facultatively anaerobic, nonmotile, catalase-positive or negative, small, spherical bacteria from pairs to, grape-like clusters, from where the name Staphylococcus comes from (staphyle, meaning a bunch of grapes, and kokkos, meaning berry).

What is Staphylococcus pathogenicity?

ABSTRACT. Staphylococcus aureus is one of the most frequent worldwide causes of morbidity and mortality due to an infectious agent. This pathogen can cause a wide variety of diseases, ranging from moderately severe skin infections to fatal pneumonia and sepsis. Treatment of S.