2#

Question 1

Clumping factor is a fibrinogen binding adhesin ;responsible for slide coagulase reaction

Answer 1

True

Question 2

Exfoliative toxin is responsible for staphylococcal scalded skin syndrome (SSSS)

Answer 2

True

Question 3

Beta hemolytic streptococci were classified by lancefield based on C-carbohydrate antigen

Answer 3

True

Question 4

Streptoccal pyrogenic exotoxin is responsible for the pathogenesis of scarlet fever

Answer 4

True

Question 5

C-reactive protein (CRP) is an antibody to pneumococcal C-antigen

Answer 5

False

Question 6

Typhoidal Salmonellae is most commonly associated with animal food products especially eggs

Answer 6

False

Question 7

Streptococcus pyogenes C-carbohydrate cross -react with human myocardial antigens

Answer 7

False

Question 8

Patients with PSGN have elevated sterptococcal anti-DNase and B antibodies

Answer 8

True

Question 9

Dimorphic fungi exist as molds at 25°C and as yeasts at 37°C

Answer 9

True

Question 10

There is increasing trend of cutaneous diphtheria nowadays ,especially in vaccinated children

Answer 10

True

Question 11

Cutaneous anthrax is the most common form of anthrax accounting for 95%of all cases

Answer 11

True

Question 12

Pili are the principle virulence factors of gonococci

Answer 12

True

Question 13

Clostridia have bulging spores in contrast to the genus Bacillus

Answer 13

True

Question 14

H antigen is responsible for bacterial motility

Answer 14

True

Question 15

Adult vagina is resistant to gonococci

Answer 15

True

Question 16

C.tetani produces spherical and terminal spores of drum stick appearance

Answer 16

True

Question 17

Phagocytosis of tubercle bacilliby macrophage is enhanced by C2b mediated opsonization

Answer 17

False

Question 18

Alpha-toxin is the principle virulence factor of C.perfringens

Answer 18

True

Question 19

V.cholera O1 was responsible for all pandemics and most of the epidemics of cholera

Answer 19

True