Practicum 2: Gram-Negative Rods (Vibrio and Aeromonas)

all the vibrio and aeromonas are catalase ____.

positive

all the vibrio and aeromonas are oxidase ____.

positive

string test positive:

vibrio cholerae, vibrio vulnificus

string test negative:

vibrio parahaemolyticus, aeromonas hydrophila

of all the vibrio and aeromonas are motility ____.

positive

all the vibrio are indole ____.

positive

aeromonas hydrophila is indole ____.

variable

positive esculin hydrolysis:

aeromonas hydrophila

weak positive esculin hydrolysis:

vibrio vulnificus

urea positive:

vibrio parahaemolyticus

citrate positive:

vibrio cholerae, vibrio vulnificus

% NaCl tolerance for vibrio cholerae:

0, 3, 6

% NaCl tolerance for vibrio vulnificus:

3

% NaCl tolerance for vibrio parahaemolyticus:

3, 6, 8

% NaCl tolerance for aeromonas hydrophila:

0, 3

all vibrio and aeromonas are:

fermenters

beta hemolysis:

vibrio cholerae, aeromonas hydrophila

alpha hemolysis:

vibrio parahaemolyticus, vibrio vulnificus

all MAC plates are:

colorless

HEA plate is yellow with sugar fermentation:

vibrio cholerae, aeromonas hydrophila

HEA plates are colorless:

vibrio parahaemolyticus, vibrio vulnificus

TCBS plate is yellow with sucrose fermentation:

vibrio cholerae

TCBS plate is colorless:

vibrio parahaemolyticus, vibrio vulnificus

TCBS has no growth:

aeromonas hydrophila