Gram Negative Bacteriology

Question 1

what color is gram-

Answer 1

pink

Question 2

what 3 gram - bacteria are oxidase + and comma shaped?

Answer 2

campylobacter jejuni
vibrio cholerae
h. pylori

Question 3

how can you differentiate the 3 gram - comma shaped oxidase + bacteria

Answer 3

campylobacter jejuni- grows at 42C
vibrio cholerae- grows in alkaline media
h. pylori- produces urease

Question 4

what gram - rod is a non lactose fermenter and oxidase +

Answer 4

pseudomonas

Question 5

what gram- rods are non lactose fermenters and oxidase -

Answer 5

salmonella
proteus
yersinia
shigella

Question 6

how do you differentiate the gram- rods that are non lactose fermenters and oxidase -

Answer 6

producing H2S and motile: salmonella, proteus, yersinia

non H2S producing and non motile: shigella

Question 7

what gram-rods are fast lactose fermenters

Answer 7

klebsiella, E coli and enterobactera

Question 8

what 2 gram- rods are slow lactose fermenters

Answer 8

citrobacter

serratia

Question 9

what are the 2 gram- diplococci and how do you differentitate

Answer 9

N. meningitis
N. gonorrhoeae

N. meningitis ferments maltose
N. gonorrhea does not ferment maltose

Question 10

what are the gram- coccoid rods

Answer 10

H. influenzae
pasteurella
brucella
bordetella