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This Osmosis High-Yield Note provides an overview of Staphylococcus essentials. All Osmosis Notes are clearly laid-out and contain striking images, tables, and diagrams to help visual learners understand complex topics quickly and efficiently.
Bacteria in the genus Staphylococcus are pathogens of man and other mammals. Traditionally they were divided into two groups on the basis of their ability to clot blood plasma (the coagulase reaction). The coagulase-positive staphylococci constitute the most pathogenic species S aureus.
Staphylococcal enterotoxins (SEs) can be produced in food by many strains of S. aureus and by some other coagulase-positive staphylococci, e.g. S. intermedius, S. hyicus, S. delphini. The enterotoxigenic strain needs to grow to levels >105 cfu/g before the toxin is produced at detectable levels.
Staphylococci are gram-positive aerobic organisms. Staphylococcus aureus is the most pathogenic; it typically causes skin infections and sometimes pneumonia, endocarditis, and osteomyelitis. It commonly leads to abscess formation.
Staphylococcus can cause a wide variety of diseases in humans and animals through either toxin production or penetration. Staphylococcal toxins are a common cause of food poisoning, for they can be produced by bacteria growing in improperly stored food items. The most common sialadenitis is caused by staphylococci, as bacterial infections. [27]
1 Δεκ 2021 · Staphylococcus aureus is a commensal bacterium known to colonize the skin, nares, and gastrointestinal tract of humans. Asymptomatic workers can contaminate food via manual contact or through respiratory secretions thus becoming the source of staphylococcal food poisoning.
Staphylococci have emerged as important pathogens for both nosocomial and community-acquired infections in people. For example, USA300 is a predominant community-associated methicillin-resistant S. aureus strain; it carries an arginine catabolic mobile element (ACME) which contains potential virulence factors playing a role in bacterial ...
