What is Staphylococcus aureus ATCC 25923?

Staphylococcus aureus subsp. aureus ATCC 25923 is a clinical isolate with the designation Seattle 1945 that is used as a standard laboratory testing control strain. It is sensitive to a variety of antibiotics, including methicillin.

What does Staphylococcus aureus cause?

It is the leading cause of skin and soft tissue infections such as abscesses (boils), furuncles, and cellulitis. Although most staph infections are not serious, S. aureus can cause serious infections such as bloodstream infections, pneumonia, or bone and joint infections.

What is Camp test in microbiology?

The CAMP test (Christie–Atkins–Munch-Peterson) is a test to identify group B β-hemolytic streptococci (Streptococcus agalactiae) based on their formation of a substance (CAMP factor) that enlarges the area of hemolysis formed by the β-hemolysin elaborated from Staphylococcus aureus.

Who discovered Staphylococcus aureus?

In 1884 Anton J. Rosenbach (1842-1923), a German surgeon, isolated two strains of staphylococci, which he named for the pigmented appearance of their colonies: Staphylococcus aureus, from the Latin aurum for gold, and Staphylococcus albus (now called epidermidis), from the Latin albus for white (5).

What is the positive result in CAMP test?

A positive result in the standard assay is the formation of a distinct arrowhead of hemolysis at the intersection of the Staphylococcus and test organism streaks. A positive reverse CAMP or phospholipase D is indicated by a typical arrowhead of no hemolysis at the junction of the two hemolytic organisms.

What does a positive CAMP test mean?

Principle of CAMP test The group B streptococci are streaked perpendicular to a streak of S. aureus on sheep blood agar. A positive reaction appears as an arrowhead zone of hemolysis adjacent to the place where the two streak lines come into proximity.

What is the difference between Staphylococcus and Staphylococcus aureus?

Staphylococci are Gram-positive cocci that grow in clumps, are catalase test positive and coagulase test positive (Staph. aureus) or negative (coagulase-negative staphylococci). Staph. aureus is the most important pathogen, causing a variety of pyogenic infections and toxin-mediated illnesses in normal hosts.