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5.0
PH346 BACTERIAL PATHOGENS2025- 2026
QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) /ALREADY GRADED A+
Quiz: staph aureus
Ans: - gram positive cocci in clusters, catalase +, coagulase +, gold
colonies on blood agar
- MSSA, MRSA, CA-MRSA, HA-MRSA, VISA, VRSA
- skin, mucous membrane, respiratory tract, air
- Skin and soft tissue infections (impetigo, folliculitis, erysipelas, cellulitis),
toxin-mediated diseases (scalded skin syndrome, toxic shock
syndrome)
- resistant to nearly all b lactams via b lactamase/PBP
- cloxacillin works against MSSA only
Quiz: staph epidermidis
Ans: - gram positive cocci in clusters, catalase +, coagulase -, white
colonies on blood agar
- skin, mucous, respiratory tract, air
- prosthetic material infections (IV, catheter, sepsis, endocarditis)
- resistant to nearly all b lactams
- cloxacillin works against MSSE only
Quiz: Staphylococcus saprophyticus
Ans: - gram positive cocci in clusters, catalase +, coagulase -, white
colonies on blood agar
- genitourinary mucus membranes of childbearing women
- UTI
, Quiz: Streptococcus pyogenes
Ans: - Group A, gram pos cocci in chains, catalase -, beta hemolytic,
reacts with Anti-A antibodies, PYR +,
- 250 M protein types
- ubiquitous, skin, mucus, throats of asymp carriers
- skin and soft tissue infections (abscesses, erysipelas, cellulitis), Pharyngitis,
tonsillitis, immune-mediated diseases, toxin-mediated (scarlet fever,
necrotizing fasciitis, toxic shock syndrome)
- susceptible to b lactams a
Quiz: Streptococcus agalactiae
Ans: - gram pos cocci in chains, catalase -, Group B beta hemolytic
- 10 capsular subtypes
- vagina, cervix, GI tract
- Postpartum sepsis
Neonatal pneumonia
Neonatal sepsis
Neonatal meningitis
- susceptible to b lactams
Quiz: Streptococcus pneumonia
Ans: - gram pos diplococci, catalase -, alpha hemolytic,
- 100 capsular types (protect from phagocytosis)
- URT, asymp carriers mostly in children
- Pneumonia, Otitis media, Sinusitis, Sepsis, Meningitis
- resistant to b lactams via PBP
Examstudy - Stuvia US