IDT203

Question 1

Name the medically important enterobacteriaceae

Answer 1

1) escherichia
2) shigella
3) salmonella
4) klebsiella
5) serratia
6) proteus
7) yersinia
8) enterobacter

Question 2

E.coli is a gram- _______, facultatively anaerobic _______

Answer 2

negative, bacilli

Question 3

where is E.coli found?

Answer 3

found normally in the large intestine (colon)

Question 4

What types of infections can the E.coli strains cause?

Answer 4

1) UTI (cystitis, pyelonephritis, prostatitis)
2) intra-abdominal infections
3) bacteremia
4) sepsis

Question 5

What type of infections are associated with P-fimbraie adhesion factors?

Answer 5

UTIs, pyelonephritis and urosepsis

Question 6

How do capsules promote bacterial virulence?

Answer 6

1) antiopsonization - decrease ability of antibodies to bind bacteria
2) antiphagocytic - decrease white blood cell phagocytosis

Question 7

what type of infections are associated with S-fimbriae?

Answer 7

neonatal sepsis and meningitis

Question 8

list the factors that contribute to the pathogenicity and virulence of E.coli

Answer 8

1) adhesins
2) iron acquisition
3) plasmids
4) toxins
5)

Question 9

what are exotoxins?

Answer 9

extracellular bacterial toxins that are exported from the bacterial cell and can bind to cell-surface receptors