Bug identification - UTI

Question 1

Gram - rod

Answer 1

Immediately consider E. coli (biggest cause of UTIs)

Otherwise Klebsiella, Proteus

Question 2

Gram + cocci in UTI

Answer 2

Staphylococcus saprophyticus most likely (other tests)

Question 3

Indole +
Methyl Red +
VP -
Citrate -

Answer 3

E. coli

see indole +, citrate - –> think e coli

Question 4

Pink on MacConkey Agar?

Answer 4

Ferment Lactose (E. coli, Klebsiella, citrobacter slow, enterobacter)

Question 5

Catalase +

Answer 5

Staph

Not strep or enterococci

Question 6

Coagulase +

Answer 6

Staph aureus

Question 7

Coagulase -

Answer 7

Staph epidermidis or saprophyticus

Question 8

Novobiocin resistant

Answer 8

S. saprophyticus

Question 9

Novobiocin sensitive

Answer 9

S. epidermidis

Question 10

S. saprophyticus is ____ hemolytic

Answer 10

gamma (not at all)

Question 11

Indole -
Methyl Red- variable
VP +
Citrate +

Answer 11

Klebsiella

Question 12

lactose fermenting, nonmotile, gram - rod
mucoid lactose fermenter
healthcare associated

Answer 12

Klebsiella

Question 13

urease +

swarming motility

Answer 13

proteus mirabilis

Question 14

indole -
MR +
VP variable
citrate +

Answer 14

proteus mirabilis