Salmonella

Question 1

Salmonella cholerasuis was Isolated and described as the

Answer 1

hog cholera bacillus

Question 2

Salmonella is a Gram ______?

Answer 2

Negative

Question 3

Is Salmonella capsulated?

Answer 3

Non-capsulated

Question 4

Salmonella has what type of flagella and fimbriae?

Answer 4

Peritrichous flagella with fimbriae.

Question 5

What species of Salmonella is Non-flagellated.

Answer 5

S. gallinarum and S. pullorum

Question 6

Is Salmonella aerobic or anaerobic?

Answer 6

Aerobic and facultative anaerobic.

Question 7

Does Salmonella produce gas from glucose?

Answer 7

Yes

Question 8

Is salmonella a lactose fermenter?

Answer 8

No

Question 9

What are the selective media for Salmonella?

Answer 9

Tetrathionate and sodium selenite.

Question 10

On which agar media can Salmonella grow?

Answer 10

BGA, MacConkey agar, bismuth sulfite agar.

Question 11

What are the major antigens of Salmonella?

Answer 11

O, H, and Vi antigens.

Question 12

The structure and composition of the polysaccharide in the cell wall.determines the specificity of what antigen?

Answer 12

O antigen?

Question 13

Salmonella antigens change due to?

Answer 13

Lysogeny

Question 14

loss of O antigen causes

Answer 14

loss of virulence

Question 15

Smooth is more virulent that Rough

Answer 15

True

Question 16

What antigen is made of protein and is heat-labile

Answer 16

H antigen, also known as the flagellar antigen.

Question 17

What genes code for H antigen flagellin?

Answer 17

H1 and H2 genes.

Question 18

H antigen phase variation is also known as

Answer 18

phase of Andrewes

Question 19

H antigen exists as monophasic or diphasic, with only one form (FljB or FljC) expressed at a time is called?

Answer 19

phase of Andrewes

Question 20

Which Salmonella species has the Vi antigen?

Answer 20

S. typhi

Question 21

What sp. (causes typhoid in humans).

Answer 21

S. typhi

Question 22

Name some typical Salmonella species.

Answer 22

S. cholerasuis, S. enteritidis, S. gallinarum, S. typhi, S. typhimurium.

Question 23

Give an example of an atypical Salmonella.

Answer 23

S. salamae.

Question 24

What is the main mode of Salmonella transmission?

Answer 24

Feco-oral route.

Question 25

In poultry, what is a primary source of Salmonella infection?

Answer 25

Contaminated feed.

Question 26

Which Salmonella species is universally distributed?

Answer 26

S. typhimurium.

Question 27

Are young animals more susceptible to salmonellosis than older ones?

Answer 27

Yes.

Question 28

What are the sources of Salmonella infection?

Answer 28

wild birds and rodents

Question 29

At what temperature are most Salmonella killed?

Answer 29

56°C for 10-20 minutes

Question 30

Which Salmonella species is heat-resistant?

Answer 30

S. senftenberg

Question 31

salmonellosis starts as an infection where?

Answer 31

Enteric

Question 32

How do prostaglandins contribute to Salmonella diarrhea

Answer 32

They activate adenylate cyclase

Question 33

This causes secretion of water, carbonate, and chloride into the intestine.

Answer 33

adenylate cyclase

Question 34

What is a significant diagnosis for salmonellosis

Answer 34

Neutrophils in feces

Question 35

Which Salmonella species are most important in cattle?

Answer 35

S. dublin (host-adapted) and S. typhimurium (worldwide).

Question 36

Which Salmonella species affect poultry?

Answer 36

S. pullorum and S. gallinarum.

Question 37

What disease does S. pullorum cause?

Answer 37

Bacillary white diarrhea.

Question 38

What disease does S. gallinarum cause?

Answer 38

Fowl typhoid.

Question 39

Is S. pullorum highly fatal in young chicks?

Answer 39

Yes, especially in the first few days of life.

Question 40

How is S. pullorum transmitted?

Answer 40

Transovarial (through eggs).

Question 41

What species cause meningoencephalitis?

Answer 41

S. pullorum

Question 42

S. gallinarum cross-react with?

Answer 42

S. pullorum

Question 43

How is S. gallinarum transmitted vertically?

Answer 43

Through eggs (transovarial).

Question 44

S. gallinarum be transmitted by ticks?

Answer 44

Argas persicus

Question 45

What disease does S. typhimurium cause?

Answer 45

: Paratyphoid.

Question 46

What condition does S. typhimurium cause in pigeons?

Answer 46

Megrims.

Question 47

Salmonella is what type of parasite?

Answer 47

facultative intracellular parasite?

Question 48

What type of immunity is involved in Salmonella infection?

Answer 48

Cell-mediated immunity.

Question 49

S. gallinarum is flagellated. (True/False)

Answer 49

False.

Question 50

The Vi antigen is found in all Salmonella species. (True/False)

Answer 50

False (only S. typhi).