Gram + bacteria

Question 1

Streptococci

Answer 1

Gram +
NO Catalase enzyme (no bubbles w/ H2O2)
1. Beta-hemolytic: completely lyse RBC
2. Alpha-hemolytic: partially lyse RBC (greenish discolor)
3. Gamma-hemolytic: Unable to hemolyse RBC

Question 2

staphylococcus

Answer 2

gram +
penicillin resistant b/c secrete penicillinase (breaks it down)
coagulase +: staph aureus
coagulase -: staphylococcus epidermidis

Question 3

MRSA

Answer 3

methicillin-resistant staphylococcus aureus
penicillin resistant > penicillinase breaks it down
methicillin resistant > multi drug resistance