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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).
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 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.
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 ...
Key Points. 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. Some strains elaborate toxins that cause gastroenteritis, scalded skin syndrome, and toxic shock syndrome.
In general, bacterial pathogens cause foodborne diseases by three mechanisms: ingestion of preformed toxins in foods (intoxication; e.g., Staphylococcus aureus), production of toxins within the gastrointestinal tract following ingestion of pathogens (food toxicoinfection; e.g., Clostridium perfringens), or invasion of the intestinal epithelial c...
For example, many health care workers carry methicillin-resistant Staphylococcus aureus (MRSA) bacteria in their noses but are not symptomatic. Portal of Exit: The route by which an infectious agent escapes or leaves the reservoir. In humans, the portal of exit is typically a mucous membrane or other opening in the skin.
