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PH 152 > Yersinia > Flashcards

Yersinia Flashcards

0
Q 
False about Yersinia
A. All are strictly anearobic
B. 1 serotype, 3 biotypes
C. Catalase positive
D. (-) in motility, oxidase, lactose, urease, indole
A

A

Some are aerobic
Some are faculatively anaerobic
Some are microaerophilic

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1
Q

The plague is caused by this Yersinia species

A

Yersinia pestis

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2
Q

Yersinia outer proteins enter cells via __

A

Type III secretion system

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3
Q

What is pseudotuberculosis?

A

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

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4
Q

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

A

Xenopsylla cheopis

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5
Q

Scientific name of flea that transmits Yersinia @ US

A

Oropsylla montana

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6
Q

Primary reservoir of Yersinia @ sylvatic plague

A

Wild rodents

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7
Q

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

A

Swollen & painful lymph node

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8
Q

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

A

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

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9
Q

Best specimen for diagnosing Plague

A

Blood & aspirates of lymph nodes

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10
Q

Two smears used to identify Yersinia

A

Giemsa’s stain

Wayson’s stain

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11
Q

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

A

A

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12
Q

Colony of growth of Yersinia on BAP

A

Fried egg appearance

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13
Q

In cats, Yersinia may seroconvert. True or false?

A

False.

True for dogs

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14
Q

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

A

True

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15
Q

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

A

16
Q 
Y.enterocolitica may be isolated from all except
A. Rodents
B. Domestic animals
C. Contaminated water
D. Feces
A

D

17
Q

Y.pseudotuberculosis is isolated from what specimen?

A

Feces of domestic/farm animals & birds

18
Q 
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
A

B

Enterotoxin dapat

19
Q

Enumerate the virulence factors of Y.pseudotuberculosis

A

Superantigens
Bacterial adhesions
Yersinia outer proteins

20
Q 
Cold enrichment helps in lab ID of 
A. Y.enterocolitica
B. Y.pseudotuberculosis
C. Both
D. Neither
A

A

PH 152 (47 decks)

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