Enterobacteriacaea

Question 1

What are some general features of Selmonella Typhimurium

Answer 1

It is none host specific - Entric disease - Animals are often carriers - Antibiotic treatment can lead to a carrier state - Stress promotes shedding +/- disease

Question 2

_______ - resistant Selmonella Typhimurium is a major problem over seas

Answer 2

Quinolone - resistant

Last line drug

Question 3

What are some general features of Yersinia pestis (Plague)

Answer 3

Non-lactose fermenting - Cold enrichment - Facultative intracellular organisms - Zoonotic - easily grown in culture

Question 4

How is Yersinia pestis transmitted/host animals/symptoms

Answer 4

It is endemic in small mammals/rodents - Transmitted by infected flea bit - Enlarged lymph nodes/septicaemia

Question 5

How can you diagnose/treat Yersinia pestis

Answer 5

Blood smear/culture

Antibiotics/Penicillin

Question 6

What are some general features of Yersinia Pseudotuberculosis

Answer 6

Found in animal GIT (Mainly birds) - Subclinical enteric infections in many animals - Occasionally enteritis/septicaemia/abortion - Multiply in macrophages

Question 7

How did Yersinia pestis come about

Answer 7

Yersinia Pseudotuberculosis with gene loss + gain of 2 virulence plasmids

Question 8

What are some general features of Yersinia entercolitica

Answer 8

Food borne infection (Pig meat) - Enteritis/Pseudoappendicitis (mesenteric lymphadenitis)(In gut) - Occasionally septiaemic - Latent infections in animals with sporadic cases of enteritis (pigs)