Gram + Cocci bacteria

Question 1

what is the main host defense against gram + cocci?

Answer 1

phagocytosis

Question 2

general characteristics of streptococci

Answer 2

gram +
catalase neg
chains (usually)
many are part of endogenous flora
facultative (can grow aerobically and anaerobically)
some are capnophiles (require CO2 for growth)

Question 3

hemolytic patterns on sheep blood agar

Answer 3

complete beta hemolysis = clear zone
incomplete alpha hemolysis = green color
no gamma hemolysis = no change in media

Question 4

lance field grouping

Answer 4

used to classify beta hemolytic strep according to specific cell wall C carbs
based on serologic properties
groups A-O

Question 5

streptococcus bovis

Answer 5

normal gut flora

ass’n w/ occult making of colon

Question 6

peptostreptococci

Answer 6

anaerobic gram +
normal flora in mouth, vagina, intestines
involved in mixed infections - intraabdominal abscesses, aspiration mnemonics, peritonitis

Question 7

general characteristics of enterococcus

Answer 7

catalase neg
aerobic
gram +
possess group D CW Ag

Question 8

general characteristics of staphylococci

Answer 8

gram +
clusters
catalase +
facultative

Question 9

staphylococcus saprophyticus

Answer 9

coagulate neg staph
colonizes skin and urethral areas
UTIs in adolescent new sexually active females