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Mass psychogenic illness (MPI), also called mass sociogenic illness, mass psychogenic disorder, epidemic hysteria or mass hysteria, involves the spread of illness symptoms through a population where there is no infectious agent responsible for contagion.
A 2004 study showed that people in the United States with S. aureus infection had, on average, three times the length of hospital stay (14.3 vs. 4.5 days), incurred three times the total cost ($48,824 vs. $14,141), and experienced five times the risk of in-hospital death (11.2% vs 2.3%) than people without this infection. [123]
Methicillin-resistant Staphylococcus aureus (MRSA) evolved from methicillin-susceptible Staphylococcus aureus (MSSA), otherwise known as common S. aureus. Many people are natural carriers of S. aureus, without being affected in any way. MSSA was treatable with the antibiotic methicillin until it acquired the gene for antibiotic resistance. [59]
MSSA may refer to: Member of the Order of the Star of South Africa; Methicillin-sensitive Staphylococcus aureus, a subspecies of bacterium; Military Selective Service Act, a law establishing the current Selective Service System in the United States; Military-style semi-automatic, a firearm (abbreviation commonly used in New Zealand)
Types of pathogenesis include microbial infection, inflammation, malignancy and tissue breakdown. For example, bacterial pathogenesis is the process by which bacteria cause infectious illness. [citation needed] Most diseases are caused by multiple processes.
The behavioral immune system is a phrase coined by the psychological scientist Mark Schaller to refer to a suite of psychological mechanisms that allow individual organisms to detect the potential presence of infectious parasites or pathogens in their immediate environment, and to engage in behaviors that prevent contact with those objects and individuals.
Staphylococcus aureus is the most common cause of healthcare-associated bacteremia in North and South America and is also an important cause of community-acquired bacteremia. [14] Skin ulceration or wounds, respiratory tract infections, and IV drug use are the most important causes of community-acquired staph aureus bacteremia.
The most common colonization site in the human body is within the nasal cavity and from here, the bacteria can cause infections. [42] [43] S. pseudintermedius infections in a human host have been known to cause endocarditis, post-surgical infections, inflammation of the nasal cavity (rhinosinusitis) and catheter-related bacteremia. [6]