2.9.4.2 Yersinia pestis

Question 1

Yersinia pestis is a causative agent for?

Answer 1

Plague

Question 2

Yersinia pestis is also known as?

Answer 2

Plague bacillus

Question 3

What is the MOT for plague?

Answer 3

Rate flea bite

Question 4

What are the 2 forms of plague?

Answer 4

Bubonic
Pneumonic plague

Question 5

A plague that causes bullous or swollen lymph nodes

Answer 5

Bubonic (Glandular)

Question 6

If bubonic plague is left untreated?

Answer 6

Septic shock

This spreads to the lung which leads to pneumonic plague

Question 7

If pneumonic plague is left untreated?

Answer 7

Septicemic plague (Rare and severe cases)

Question 8

What is the stain for Yersinia pestis

Answer 8

Wayson stain

Question 9

What is the appearance of Yersinia pestis in Wayson stain?

Answer 9

Bipolar bodies “Safety pin appearance

Lancet shape
- Resemble Streptococcus pneumoniae

Question 10

What appearance of Yersinia pestis exhibit in SBA?

Answer 10

Cauliflower appearance

Question 11

What appearance of Yersinia pestis exhibit in Broth?

Answer 11

Stalactite pattern

Question 12

What is the preferential growth for Y. pestis?

Answer 12

25 - 30C