BIOL 2051 Study Guide - Necrotizing Fasciitis, Upper Respiratory Tract Infection, Streptococcal Pharyngitis
Document Summary
Staphylococcus aureus (opportunistic pathogen- can be bad under certain conditions. Scalded skin syndrome- due to exfoliative toxin (makes skin peal off) Can produce hemolysins, superantigen enterotoxin a (food poisoning), coagulase, leukocidin, superantigen tsst (toxic shock syndrome) s. aureus is the most common to cause food poisioning. Can also cause pneumonia & meningitis- less common. Evolved in environment with high levels of anitbiotic. 60+ strains strep throat (pharyngitis)- 5-10% of sore throats. Most are caused by virus diagnosis- blood agar: slow; antibody test: rapid infections of the inner ear impetigo- skin infection. Scarlet fever exotoxin superantigen; can follow pharyngitis; pink rash & strawberry tongue . Rheumatic fever autoimmune; antibodies against s. pyogenes react with host tissue-damages heart valves necrotizing fasciitis ( flesh eating disease ) Chickenpox caused by varicella-zoster virus (vzv), a herpesvirus. Vzv can lay dormant in nerve cells for long periods of time. Shingles is caused by the migration of vzv to the skin; painful blisters.