*coagulase used to differentiate Staphylococcus aureus from other Staphylococci species like S
*Staphylococci are nonmotile and do not form spores
*Culture under aerobic or microaerophilic conditions
*Staphylococcus aureus usually forms gray to deep golden yellow colonies.
*Staphylococcus epidermidis colonies usually are gray to white
*Staphylococcus epidermidis/saprophyticus is a coagulase-negative
*Staphylococcus aureus is coagulase-positive
*The staphylococci are gram-positive spherical cells
*Staphylococci produce catalase, which converts hydrogen peroxide
into water and oxygen
."Tolerance" implies that staphylococci are inhibited by a drug but not killed by it
*staphylococci, which are positive,streptococci, which are negative
*Staphylococcus epidermidis/saprophyticus is a coagulase-negative,
Staphylococcus aureus is coagulase-positive
Toxins
*Panton-Valentine Leukocidin
*Exfoliative Toxins
(causes staphylococcal Bullous exfoliation)
*Toxic Shock Syndrome Toxin
*Staphylococcus Exotoxins*Enterotoxins food poisoning
*Pathology S aureus established in a hair follicle lead to tissue necrosis, pneumonia, meningitis, empyema, endocarditis, or sepsis
*Focal suppuration/osteomyelitis (abscess) is typical of staphylococcal
*Enterotoxins food poisoning
*Pathology S aureus established in a hair follicle lead to tissue necrosis, pneumonia, meningitis, empyema, endocarditis, or sepsis
*Focal suppuration/osteomyelitis (abscess) is typical of staphylococcal
*(1–8 hours); violent nausea, vomiting, and diarrhea; and rapid convalescence. There is no fever=Food poisoning due to staphylococcal enterotoxin
• S aureus infection can also result from direct contamination of a wound
*Staphylococci are nonmotile and do not form spores
*Culture under aerobic or microaerophilic conditions
*Staphylococcus aureus usually forms gray to deep golden yellow colonies.
*Staphylococcus epidermidis colonies usually are gray to white
*Staphylococcus epidermidis/saprophyticus is a coagulase-negative
*Staphylococcus aureus is coagulase-positive
*The staphylococci are gram-positive spherical cells
*Staphylococci produce catalase, which converts hydrogen peroxide
into water and oxygen
."Tolerance" implies that staphylococci are inhibited by a drug but not killed by it
*staphylococci, which are positive,streptococci, which are negative
*Staphylococcus epidermidis/saprophyticus is a coagulase-negative,
Staphylococcus aureus is coagulase-positive
Toxins
*Panton-Valentine Leukocidin
*Exfoliative Toxins
(causes staphylococcal Bullous exfoliation)
*Toxic Shock Syndrome Toxin
*Staphylococcus Exotoxins*Enterotoxins food poisoning
*Pathology S aureus established in a hair follicle lead to tissue necrosis, pneumonia, meningitis, empyema, endocarditis, or sepsis
*Focal suppuration/osteomyelitis (abscess) is typical of staphylococcal
*Enterotoxins food poisoning
*Pathology S aureus established in a hair follicle lead to tissue necrosis, pneumonia, meningitis, empyema, endocarditis, or sepsis
*Focal suppuration/osteomyelitis (abscess) is typical of staphylococcal
*(1–8 hours); violent nausea, vomiting, and diarrhea; and rapid convalescence. There is no fever=Food poisoning due to staphylococcal enterotoxin
• S aureus infection can also result from direct contamination of a wound