QUESTION 1

If a fermentative organism is MR positive, its VP reaction will be

QUESTION 2

Which reagent(s) is/are used for the Voges Proskauer test?

QUESTION 3

When Kovac's reagent is added to SIM medium, a positive result will appear as

QUESTION 4

What test is used to distinguish between lactose negative, hydrogen sulfide positive Salmonella species and Proteus species, which have the same reactions?

QUESTION 5

When P. vulgaris is inoculated in either TSI or SIM, a black precipitate appears. This is a result of formation of what? 

QUESTION 6

Nitrate reagents A and B are added to a 48 hour culture in nitrate broth. No color develops. What is the next step?

QUESTION 7

Nitrate reagents A and B, sulfanilic acid and alpha naphthylamine, will turn red when reaction with what? 

QUESTION 8

An 18-24 hour culture in TSI medium has pink slant, a yellow but, bubbles in the medium, and no precipitate. Which of the following would be the proper interpretation?

QUESTION 9

The pH indicator used for the decarboxylase test medium base is

QUESTION 10

Breaks down hydrogen peroxide  

QUESTION 11

Incomplete lysis of blood agar (greening)     

QUESTION 12

Complete lysis of blood agar (clearing)     

QUESTION 13

Lactose positive on MacConkey's agar     

QUESTION 14

Selects for Gram positive bacteria     

QUESTION 15

Used to differentiate Streptococcus and Enterococcus     

QUESTION 16

Used to differentiate Micrococcus and Staphylococcus     

QUESTION 17

Clots plasma 

QUESTION 18

S. pyogenes is susceptible     

QUESTION 19

S. pneumoniae is susceptible