Αποτελέσματα Αναζήτησης
Structure. Staphylococci are Gram-positive cocci about 0.5 – 1.0 μm in diameter. They grow in clusters, pairs and occasionally in short chains. The clusters arise because staphylococci divide in two planes. The configuration of the cocci helps to distinguish micrococci and staphylococci from streptococci, which usually grow in chains.
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.
17 Ιουλ 2023 · Staphylococcus aureus is a gram-positive bacteria that cause a wide variety of clinical diseases. Infections caused by this pathogen are common both in community-acquired and hospital-acquired settings.
Staphylococcus aureus is a very resourceful pathogen (Lowy, 1998) as it possesses an immense arsenal of virulence factors, which enable the bacterium to thrive as an opportunist in humans.
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.
Staphylococcus aureus has a complex cell wall structure composed of a thick peptidoglycan layer and polysaccharide capsule. In addition, S. aureus possesses an elaborate arsenal of structural and secreted virulence factors involved in toxin production, adherence to and invasion of host tissue, and immune evasion.
Staphylococcus is a genus of Gram-positive bacteria known for their spherical or grape-like clustered shape under a microscope. They are commonly found in various environments, including on the skin and mucous membranes of humans and animals.
