Enterobacteriaceae

Question 1

Escherichia coli morphology?

Answer 1

Gram negative
Motile
Non-sporing bacilli
some strains are capsulated

Question 2

E.coli cultural characters?

Answer 2

Facultative anaerobic

grow freely in ordinary culture media and MacConkey medium they give rose-pink colonies (due to lactose fermentation)

Question 3

E.coli antigen structures (virulence factors)??

Answer 3

1-O. (somatic)
2-H. (flagellar) 
“Classified by ….
3-  150 heat-stable somatic O (LPS)
4-  100 heat-labile K (capsular) antigen 
5-  50 H(flagellar)
Pili

Question 4

Disease caused by Esch.coli?

Answer 4

1- UTI
2- neonatal meningitis and sepsis
3- peritonitis,pneumonia,wound infection,and appendicular abscess
4- Hospital-acquired infection
5- intestinal E.coli infection (diarrheal disease)

Question 5

UTI most common in females?

Answer 5

1- women has shorter urethra

2- urethra located near to rectum

Question 6

Neonatal meningitis?

Answer 6

bacterial infection Known as bacteraemia
Specifically 1- Group B streptococci (GBS) streptococcus agalactiae
2- Escherishia.coli and listeria monocytogenus

Question 7

Pyelonephritis ?

Causative organisms?

Answer 7

1-klebsiella pneumonia
2-staphylococcus aureus
3-proteus spp
4-UPEC

Question 8

Cystitis

Causative organisms?

Answer 8

1-Klebsiella pneumonia
2-staphylococcus saprophytic
3-UPEC