Semi minimals

Question 1

What kind of bacterial infection can be treated with antitoxin?

Answer 1

Infections caused by bacterial exotoxins:

Tetanus, botulism, diphtheria

Question 2

Which bacteria can be differentiated with catalase test?

Answer 2

Staphylococci (+) and streptococci (-)

Question 3

Which bacteria can be differentiated with the coagulate test?

Answer 3

Staphylococcus aureus (+) and other staphylococcus species (-)

Question 4

Microscopic morphology of staphylococci

Answer 4

Gram positive cocci, arranged in grape like structure

Question 5

Colony morphology of S. Aureus on blood agar plate

Answer 5

Average size, round colonies with butter consistency, golden pigment production and beta hemolysis

Question 6

What are the non virulent factors of S. Aureus?

Answer 6

Protein A, endocoagulase, exocoagulase, adhesin, teichoic acid, hayluronidase, protease, lipase, DNase

Question 7

What are the toxic virulent factors of S. Aureus?

Answer 7

Leukocidin, toxic shock syndrome toxin, exfoliating toxin, enterotoxin, haemolysin

Question 8

Diseases caused by S. Aureus

Answer 8

Folliculitis, furuncle, carbuncle, impetigo, pneumonia, osteomyelitis, food poisoning

Question 9

Diseases caused by S. Aureus exotoxins

Answer 9

Food poisoning, scalded skin syndrome, toxic shock syndrome

Question 10

List at least 2 coagulase negative staphylococcus species

Answer 10

S. Epidermidis, S. Saprophyticus, S. Haemolyticus, S. Lugdunesis

Question 11

Diseases caused by coagulase negative staphylococci

Answer 11

Nosocomial infections, biofilm production on the surface of plastic devices

Question 12

Which bacterium can cause “honeymoon cystitis”?

Answer 12

S. Saprophyticus

Question 13

Colony morphology of streptococcus pyogenes on blood agar plate

Answer 13

Small, pin-point colonies, surrounded by large, strong beta haemolytic zone

Question 14

Which streptococci show beta haemolysis?

Answer 14

Streptococcus pyogenes, streptococcus agalactiae

Question 15

Which streptococci show alpha haemolysis?

Answer 15

Streptococcus pneumonia, viridans streptococci (S. Mutant, S. Mitis, S. Salivarius)

Question 16

Which species is the Lancefield group A streptococcu?

Answer 16

Streptococcus pyogenes

Question 17

Which species is the lancefield group B streptococcus?

Answer 17

Streptococcus agalactiae

Question 18

What is the causative agent of scarlet fever?

Answer 18

Streptococcus pyogenes

Question 19

Which bacteria virulence factor is the causative agent of scarlet fever?

Answer 19

Streptococcus pyogenes exotoxin or erythrogenic toxin

Question 20

What is the capsule of streptococcus pyogenes made of?

Answer 20

Hyaluroic acid

Question 21

Diseases caused by streptococcus pyogenes

Answer 21

Pharyngitis, tonsillitis, sinusitis, impetigo, erysipelas, necrotizing fasciitis, scarlet fever, TSST

Question 22

What kind of post streptococcal infections can be caused by streptococcus pyogenes?

Answer 22

Acute rheumatic fever, glomerulonephritis

Question 23

Which 2 streptococcus species show 100% penicillin sensitivity still now?

Answer 23

Streptococcus pyogenes, streptococcus agalactiae

Question 24

What kind of disease can be caused in new born by streptococcus agalactiae?

Answer 24

Meningitis, sepsis, pneumonia

Question 25

Which bacterium is the leading cause of neonate meningitis?

Answer 25

Streptococcus agalactiae

Question 26

Microscopic morphology of streptococcus pneumonia

Answer 26

Gram positive diplococci

Question 27

How can be prevented the invasive disease caused by streptococcus pneumonia?

Answer 27

By 23 valent polysaccharide capsule vaccine or by 13 valent conjugated vaccine

Question 28

Which two bacteria can by differentiated based on their optochin sensitivity/resistance?

Answer 28

Streptococcus pneumonia (S) streptococcus viridans (R)

Question 29

What kind of a disease can be caused be viridans group streptococci?

Answer 29

Dental decay or endocarditis

Question 30

Which are the 2 most frequent human pathogenic enterococcus species?

Answer 30

E. Faecalis and E. Faecium