Lab 7- Yersinia Flashcards
1
Q
Species
A
Y. Pestis (black death-almost not existing anymore)
Y. Pseudotubercolosis (important in warm blood species)
Y. Enterocolitica (important in warm blood species)
Y. Ruckeri (fish)
2
Q
Habitat y. Pseudotubercolosis
A
Intestine , water
3
Q
Morphology y. Pseudotubercolosis
A
1-2 um coccoid rods
Flagella at 22 degrees
4
Q
Staining
A
Gram negative
Bipolar staining
5
Q
Culture y. Pseudotubercolosis
A
Not fastidious
Grow on low capacity media
Small colonies
Selective culture: enterobacteriaceae low capacity media
6
Q
Biochem
A
Lactose-
7
Q
Indole
A
-/+
8
Q
Urease
A
+
9
Q
Lactose
A
-
10
Q
Mannitol
A
+
11
Q
Methyl red
A
+
12
Q
Voges-proskauer
A
-
13
Q
H2S
A
-
14
Q
Phenylalanine deaminase
A
-
15
Q
Antigens y. Pseudotubercolosis
A
O antigen: 6 serogroups
H antigens : 5
Composite antigens
