Lab 3 (True or false)

Question 1

Streptococci can be observed in a smear as gram +ve coccoid bacteria forming bunches of grapes

Answer 1

False

Question 2

Streptococci are obligate pathogenic bacteria

Answer 2

False

Question 3

We can culture staphylococci selectively by using 10% NaCl, Mannitol and phenol-red containing agar

Answer 3

True

Question 4

Staphylococcus intermedius belongs to the group of coagulase -ve staphylococci

Answer 4

False

Question 5

Staphylococcus pseudointermedius causes otitis externa on dermatitis in dog and cat

Answer 5

True

Question 6

A streptococcus porcinus causes the exudative epidermitis of the pigs

Answer 6

False

Question 7

Staphylococcus aureus, streptococcus agalactiae, streptococcus dysgalactiae and streptococcus uberis are important causative agents of mastitis for ruminants

Answer 7

True

Question 8

Streptococci have higher pH optimum compared to the other bacteria

Answer 8

True

Question 9

Lactobacillus thanks to their active fermentation can produce lactate in food, this feature is important in the food industry

Answer 9

True

Question 10

Staphylococci can be observed in a spear as gram +ve coccoid bacteria in chains

Answer 10

False

Question 11

MRSA means meticillin resistant streptococcus agalactiae

Answer 11

False

Question 12

We can differentiate between staphylococci and streptococci by their pigment production

Answer 12

True

Question 13

Staphylococcus aureus, streptococcus suis and s. bovis can cause septicaemia in severe cases

Answer 13

True

Question 14

The horse strangles is caused by streptococcus dysgalactiae subs. equismilis

Answer 14

False

Question 15

The scarlet fever is caused by toxin-producing strains of streptococcus pyogenes

Answer 15

True

Question 16

Staphylococci are more fastidious bacteria when compared to the streptococci

Answer 16

False

Question 17

The lactobacilli have a higher pH optimum, compared to the other bacteria

Answer 17

False

Question 18

Lactococci and lactobacilli can be given as probiotics in case of dysbacteriosis

Answer 18

True

Question 19

Lactobacilli prefer a pH of 5.5-6.2

Answer 19

True

Question 20

S. aureus needs CO2 for the production of a capsule

Answer 20

False

Question 21

Streptococcus is catalase-negative and oxidase-positive

Answer 21

False

Question 22

S. aureus forms spores in anaerobic conditions

Answer 22

False

Question 23

Staphylococcus are catalase negative

Answer 23

False

Question 24

Mannitol agar contains 10% NaCl

Answer 24

True

Question 25

S. aureus aureus causes morel disease

Answer 25

False

Question 26

Staphylococci have capsule, but no flagella

Answer 26

False

Question 27

Staphylococci are not spore-forming bacteria

Answer 27

True

Question 28

Staphylococci show active motility

Answer 28

False

Question 29

Streptococci can not grow on nutrient agar, they need blood agar

Answer 29

True

Question 30

Streptococci are catalase negative bacteria

Answer 30

True

Question 31

Greasy pig disease is caused by Streptococcus

Answer 31

False

Question 32

Strangles of horses is caused by staphylococcus

Answer 32

True

Question 33

Morel disease is caused by Streptococcus pyro….

Answer 33

False

Question 34

Lactobacilli are facultative pathogenic bacteria

Answer 34

False

Question 35

We can differentiate Streptococci and staphylococci on the basis of oxidase production

Answer 35

False

Question 36

We can differentiate staphylococci from micrococci on the basis of catalase production

Answer 36

True

Question 37

Strangles of horses is caused by Streptococcus equorum

Answer 37

False

Question 38

Morel disease is caused by staphylococcus pseudointermedius

Answer 38

False

Question 39

Staphylococci can tolerate high (up to 10%) NaCl Conc

Answer 39

True

Question 40

Staphylococci are more fastidious that streptococci

Answer 40

False

Question 41

The EC enzymes of staphylococcus are virulence factors

Answer 41

True

Question 42

Staphylococcus bacteria stains blue

Answer 42

False

Question 43

Abscesses in lymph nodes on the head is common in strangles in horses

Answer 43

True

Question 44

pH of lactobacillus is 5.5-6.2

Answer 44

True

Question 45

Scarlet fever is caused by S. pneumonia

Answer 45

False

Question 46

Greasy pig disease is caused by S. hycius

Answer 46

True

Question 47

Streptococci are catalase negative and oxidase negative

Answer 47

True

Question 48

Staphylococcus aureus is a gram negative coccus

Answer 48

False

Question 49

Staphylococcus aureus is a haemolytic, pyogenic bacteria

Answer 49

False

Question 50

Listeria monocytogenes can propagate themselves in 4 degrees C

Answer 50

True

Question 51

Listeria monocytogenes is a gram positive coccus

Answer 51

False

Question 52

Streptococcus spp. are apathogenic, sapprophyte bacteria and belong to the normal skin flora

Answer 52

False

Question 53

The main coagulase positive species are: Staphylococcus aureus, staphylococcus intermiedus, staphylococcus aureus sp anaerobius

Answer 53

True

Question 54

Listeria monocytogenes caused main diseases forms are: Septicaemia, abortion, encephalitis

Answer 54

True

Question 55

Erysipelothrix rhusiopathiae cannot infect birds or other mammals other than swine

Answer 55

False

Question 56

Staphylococcus aureus can produce antibiotics which rarely have resistance among bacteria

Answer 56

False

Question 57

Streptococci ssp. take part information of the normal skin + mucus microflora

Answer 57

True

Question 58

Erysipelothrix rhusiopathiae can produce a capsule around the cell which gives resistance against phagocytosis

Answer 58

False

Question 59

Streptococci and Erysipelothrix infection can produce endocarditis in non-treated cases

Answer 59

True

Question 60

The name staphylococcus aureus comes from that is was first detected on the gold minor skin surface

Answer 60

False

Question 61

Staphylococci can survive in dried exudate for a long time

Answer 61

False