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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.
17 Ιουλ 2023 · Staphylococcus aureus is Gram-positive bacteria (stain purple by Gram stain) that are cocci-shaped and tend to be arranged in clusters that are described as “grape-like.” On media, these organisms can grow in up to 10% salt, and colonies are often golden or yellow (aureus means golden or yellow).
1 Δεκ 2021 · Food handlers carrying S. aureus in their nose can contaminate their hands and other parts of their body, acting as a major source of cross-contamination at any stage of the food production, processing and distribution chain (Colombari et al., 2007).
30 Οκτ 2019 · MRSA has already been isolated from food, indicating that they are present as contaminants in the food production chain [6, 51, 71]. Recently, studies have been performed focused on transmission of MRSA, since its diffusion among food-producing animals and food has increased [ 2 , 7 , 72 , 73 ].
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 ...
8 Φεβ 2019 · Methicillin-resistant Staphylococcus aureus (MRSA) is a major pathogen both within hospitals and in the community. In this Review, Fowler and colleagues provide an overview of basic and clinical...
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.
