Staphylococi

Question 1

Who produces coagulase that cause plasma to clot. ?

Answer 1

Staphylococcus aureus

Question 2

produces catalase that reduces hydrogen peroxide H 2O2.

Answer 2

S.aureus

Question 3

Hemolyzes red blood cells, β-heamolysis.

Answer 3

S.aureus

Question 4

What is the Virulence factors that causes food poisoning of s.aureus

Answer 4

Endotoxin A…..E

Question 5

Degrades fibrin clot?

Answer 5

Staphylokinase

Question 6

Kills white blood cells by producing holes in their cm?

Answer 6

Lucocidin

Question 7

What is the golden colour dye inactivate reactive oxygen species
(ROS) thus inhibit killing by neutrophils.

Answer 7

Staphyloxanthin

Question 8

S. aureus causes infections by producing

Answer 8

toxins or inducing pyogenic inflammation.

Question 9

skin infection caused by epidermolytic exotoxin

Answer 9

Scalded skin syndrome

Question 10

multi-system disease.

Answer 10

Toxic Shock Syndrome

Question 11

test is used to determine an organism’s
ability to hydrolyze DNA and use it as a source of carbon and energy
for growth.

Answer 11

DNase test

Question 12

DNase Medium contains deoxyribonucleic acid which will broken down by

Answer 12

DNase

Question 13

Typing is done by several methods:

Answer 13

1 Phage typing
2. Genotyping (PCR): 16srRNA 3. 3 Biotyping: biochemical reactions
4. Antibiotic susceptibility patter

Question 14

Treatment of S. aureus infections

Answer 14

by β-lactamase-resistant
penicillins

nafcillin or cloxacillin, some cephalosporins and
other non β -lactam

Question 15

Hospital acquired infections are often caused by antibiotic resistant strains and can only be treated with?

Answer 15

vancomycin

Question 16

ØUsually treatment of infections acquired outside hospitals can
usually be treated with

Answer 16

penicillinase-resistant β-lactams.