Yersinia

Question 1

What is the Feature of Yersinia ?

Answer 1

1- Gram – Short  coccobacilli 
2- bipolar stain= Safety-pin appearance 
3- True human pathogen
4- Are parvobacteria 
5- Causes zoonotic disease

Question 2

What is the Optimal temp. to produce coagulase in the Y . pestis → plague ?

Answer 2

27C

Question 3

What is the temperature of Polysaccharide capsule in the Y . pestis → plague ?

Answer 3

37˚C

Question 4

What is the capsule of Yersinia ?

Answer 4

Polysaccharide capsule (F-1 antigen)

Question 5

What is the Virulence of Y . pestis → plague ?

Answer 5

1- Polysaccharide capsule (F-1 antigen)
2- Endotoxin
3- Yersinia outer proteins (Yops)
4- V and W antigens
5- Plasminogen activator

Question 6

What is the specimen of Bubonic plague ?

Answer 6

aspirate from lymph node

Question 7

What is the specimen Septicemic plague ?

Answer 7

blood for blood film &blood

Question 8

What is the Pneumonic plague ?

Answer 8

sputum

Question 9

What is the treatment of Y . pestis ?

Answer 9

Streptomycin

Question 10

What is the agar that use for Y . Enterocolitis amc Y . pseudotuberculosis ?

Answer 10

MacConkey’s agar medium. At room Temp.(25C)

Question 11

What is the agar that use for Y.pestis ?

Answer 11

Blood agar and sodium solphat agar media at 27 C

Question 12

isolation can be enhanced by ( cold enrichment ) in ?

Answer 12

Y. enterocolitica

Question 13

Right iliac fossa syndrome (resembles appendicitis) is caused by ?

Answer 13

Y . enterocolitica & Y . pseudotuberculosis

Question 14

What is the post infection immune disease of Y . enterocolitica & Y . pseudotuberculosis ?

Answer 14

reactive arthritis (Rieter’s syndrome)