Yersinia Flashcards Preview

PH 152 > Yersinia > Flashcards

Flashcards in Yersinia Deck (21):
0

The plague is caused by this Yersinia species

Yersinia pestis

1

False about Yersinia
A. All are strictly anearobic
B. 1 serotype, 3 biotypes
C. Catalase positive
D. (-) in motility, oxidase, lactose, urease, indole

A

Some are aerobic
Some are faculatively anaerobic
Some are microaerophilic

2

Yersinia outer proteins enter cells via __

Type III secretion system

3

What is pseudotuberculosis?

Disease characterized by lesions ranging from local necrosis to granulomatous inflammation in the lymph nodes, spleen and liver

4

Scientific name of flea that transmits Yersinia @ Asia, Africa, South America

Xenopsylla cheopis

5

Scientific name of flea that transmits Yersinia @ US

Oropsylla montana

6

Primary reservoir of Yersinia @ sylvatic plague

Wild rodents

7

In Bubonic Plague, one need not look far to see a bubo. What is a bubo?

Swollen & painful lymph node

8

In the victims of the Black Death, subcutaneous hemorrhages that darken the skin were seen. Why?

Purpuric lesiobs & microthrombi (formed from necrosis of extremities) block the capillaries

9

Best specimen for diagnosing Plague

Blood & aspirates of lymph nodes

10

Two smears used to identify Yersinia

Giemsa's stain
Wayson's stain

11

Drug of choice for plague treatment
A. Streptomycin
B. Penicillin
C. Cephalosporin

A

12

Colony of growth of Yersinia on BAP

Fried egg appearance

13

In cats, Yersinia may seroconvert. True or false?

False.

True for dogs

14

Aminoglycosides & tetracyclines are used to treat infection in animals. True or false?

True

15

False about Y.enterocolitica / Y.pseudotuberculosis

A)lactose-fermenting
B)non-motile at 37 deg C
C)motile at 25 deg C
D)larger than Y.pestis

A

16

Y.enterocolitica may be isolated from all except
A. Rodents
B. Domestic animals
C. Contaminated water
D. Feces

D

17

Y.pseudotuberculosis is isolated from what specimen?

Feces of domestic/farm animals & birds

18

True about Yersinia enterocolitica
A. May cause diarrhea and mesenteric adenitis
B. With heat stable exotoxin
C. 5-10 days incubation
D. Has serotypes O3,O8 and O9

B

Enterotoxin dapat

19

Enumerate the virulence factors of Y.pseudotuberculosis

Superantigens
Bacterial adhesions
Yersinia outer proteins

20

Cold enrichment helps in lab ID of
A. Y.enterocolitica
B. Y.pseudotuberculosis
C. Both
D. Neither

A