Gram + cocci Flashcards
What is the bacteriology of S aureus
gram + cocci
grows in clumps
catalase +, coagulase +
B hemolytic
What is the reservoir and transmission of S aureus?
reservoir: nose
transmission: direct contact, contaminated food
S aureus is the most common cause of what type of infections?
suppurative infections of the skin, joints and bone
Name the infection and the cause “sunburn like rash that begins on face and spreads over the body - bullae form and desquamation occurs”
scalded skin syndrome
exotoxin of S aureus
Where does osteomyelitis with S aureus tend to affect:
kids
adults
kids - long bones of boys
adults - vertebrae
What is the patient population that gets endocarditis with S aureus?
IV drug users
Name some other infections with S aureus besides those that we already mentioned: scalded skin, osteomyelitis, endocarditis, suppurative skin infections
- bacterial arthritis - very common
- TSS - menstruating women
- acute food poisoning - preformed toxin
- impetigo
- pneumonia - post-flu, salmon colored sputum
Bacteriology of strep A
gram + cocci in chains
catalase (-). coagulase (-)
B hemolytic
Reservoir of strep A
skin and oropharynx
Name some suppurative infections strep A causes
- pharyngitis
- scarlet fever
- erysipelas - epidermis and dermis
- impetigo - intraepidermial
- cellulitis - deep dermis
- myositis
What are the two nonsuppurative infections that strep A causes? what specifically causes them?
rheumatic fever type II HSR - antibodies cross react with protein O
acute post strep GN - type III HSR - deposits of immune complexes
Strep pneumoniae is a major cause of what infections?
- lobar pneumonia
- ottitis media
- sinusitis
- meningitis
What is the reservoir for S pneumoniae?
oropharynx
What are the encapsulated organisms?
Some Killers Have Pretty Nice Capsules S pneum klebsiella H flu Pseudomonas aerigona, neisseria meningitis Crypto
