Curved Gram Negative Bacilli

Question 1

Oxidase +
Catalase +
Hippurate hydrolysis +
Urease =
Growth at 42C +
Susceptibility to
Naldixic Acid- S
Cephalothin- R
-“Corkscrew motility”
-most common cause of bacterial diarrhea

Answer 1

Campylobacter jejuni

Question 2

Oxidase +
Catalase +
Hippurate hydrolysis =
Urease =
Growth at 42C =
Susceptibility to
Naldixic Acid- R
Cephalothin- S

Answer 2

Campylobacter fetus

Question 3

Oxidase +
Catalase +
Hippurate hydrolysis =
Urease +
Susceptibility to
Naldixic Acid- R
Cephalothin- S

Answer 3

Helicobacter pylori

Question 4

-Oxidase +
-Sucrose +, so will produce yellow colonies on TCBS
-Positive String test
-“rice water stools” and extreme dehydration

Answer 4

Vibrio cholerae

Question 5

-Oxidase +
-Sucrose =, so will produce green colonies on TCBS
-Halophilic requires Na+
-Salt water

Answer 5

Vibrio vulnificus & Vibrio parahemolyticus

Question 6

-Oxidase +
-Freshwater and saltwater

Answer 6

Aeromonas

Question 7

-oxidase +
-Freshwater seafood poisoning

Answer 7

Pleisomonas shigelloides