![]() For example, a survey conducted by CDC reported the proportion of methicillin-resistant isolates S.What does Gram positive cocci in clusters mean? aureus to be the most common cause of nosocomial pneumonia and operative wound infections, as well as the second most common cause of nosocomial bloodstream infections. In a 1990-1992 National Nosocomial Infections survey, CDC found S. If it is allowed to grow and produces an enterotoxin, it can cause staphylococcal food poisoning. ![]() aureus is frequently introduced into food by way of abscesses or the nasal cavity of food handlers. aureus pneumonia may also be a secondary respiratory complication of viral infections such as measles, and influenza and is a frequent cause of nosocomial pneumonia in patients who are debilitated. Such systemic infections include septicemia, septic arthritis, endocarditis, meningitis, and osteomyelitis, as well as abscesses in the lungs, spleen, liver, and kidneys. aureus may escape from the local lesion and spread through the blood to other body areas, causing a variety of systemic infections that may involve every system and organ. aureus is also a frequent cause of accidental wound and postoperative wound infections. aureus may also cause cellulitis, a diffuse inflammation of connective tissue with severe inflammation of dermal and subcutaneous layers of the skin. ![]() aureus also causes impetigo, a superficial blister-like infection of the skin usually occuring on the face and limbs and seen mostly in young children. Superficial skin perforates, sloughs off, and discharges pus. The bacteria spread from the hair follicle to adjacent subcutaneous tissue.Ĭarbuncles occur when furuncles coalesce and spread into surrounding subcutaneous and deeper connective tissue. Infected hair follicles are also referred to as folliculitis.įuruncles appear as large, raised, pus-filled, painful nodules having an accumulation of dead, necrotic tissue at the base. Depending on the location and extent of tissue involvement, the abscess may be called:Ī pustule is an infected hair follicle where the base of the hair follicle appears red and raised with an accumulation of pus just under the epidermis. aureus causes pus-filled inflammatory lesions known as abscesses. contact with an abscess from an infected individual.aureus infections the source of the organism is either: The colonization rates among health care workers, patients on dialysis, and people with diabetes are higher than in the general population. Around 15% of healthy adults are persistent nasopharyngeal carriers. Approximately 30% of adults and most children are healthy periodic nasopharyngeal carriers of S. It can also be found in the throat, axillae, and the inguinal and perineal areas. aureus is with some frequency found as normal human flora in the anterior nares (nostrils). Staphylococcus aureus is the most pathogenic species and is implicated in a variety of infections. ![]() Staphylococcus aureus (coagulase-positive staphylococci) There are five species of staphylococci commonly associated with clinical infections: Staphylococcus aureus, S.
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