Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

BACTERIOLOGY & MYCOLOGY LECTURE > ENTEROBACTERIACEAE - SALMONELLA > Flashcards

ENTEROBACTERIACEAE - SALMONELLA Flashcards

1
Q

Salmonella is isolated and described as ?

A

Hog cholera bacillus (Salmonella cholerasuis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Salmonella is named after?

A

D.A. Salmon in 1885

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Give the 6 classifications of Genus Salmonella.

A

I. Typical Salmonellae
* S. cholerasuis
* S. enteritidis
* S. galinnarum
* S. typhi
* S. typhimurium

II. Atypical salmonellae
* S. salamae

III. S. arizonae and related organisms
IV. S. houtinae and related organisms
V. S bongor and related organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe the morphology of Salmonella.

A
  • Gram (-)
  • Non-capsulated short rods
  • Peritrichous flagella with fimbriae
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Give some examples of species of Salmonella that is non-flagellated.

A
  1. S. gallinarum
  2. S. pullorum
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Classify Genus Salmonella according to their oxygen requirement.

A

Aerobic and facultative anaerobic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Give some examples of agar that can be used to culture Salmonella.

A
  1. BGA
  2. MacConkey agar
  3. Bismuth sulfite agar
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Salmonella produces gases from _____ but can’t ferment ______.

A

glucose; lactose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What temp. does Salmonella grow?

A

37 C; 43 C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the only specie of Salmonella that contains Vi antigen ?

A

S. typhi; cause of typhoid in humans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the antigens present in Salmonella ?

A
  1. O antigen
  2. H antigen
  3. Vi
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Variation in ____ antigen can change the colony variation from smooth (S) to rough which can result to loss of _____ antigen and sometimes virulence

A

O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the main mode of transmission of Salmonella ?

A

Feco-oral route

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What specie of Salmonella is universally distributed ?

A

S. typhimurium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Enumerate the host-adapted and non-host adapted salmonellae.

A

HOST ADAPTED
* S. abortus equi
* S. abortus ovis
* S. cholerasuis
* S. dublin
* S. gallinarum S
* S. paratyphi (A, C)
* S. pullorum
* S. typhi

NON-HOST ADAPTED
* S. anatum
* S. derby
* S. newport
* S. tennessee
* S. typhimurium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Older animals are more susceptible to salmonellosis than younger ones. True or False?

17
Q

Salmonellae can be killed at what temp and duration?

A

56 C for 10 to 20 minutes (except S. senftenberg)

18
Q

Salmonellosis starts at _____ infection then reaches the bloodstream.

19
Q

What is the first step of the pathogenesis of Salmonellae ?

A

Colonization of distal small intestine and colon

20
Q

Enumerate the 3 phases of the pathogenesis of Salmonellae.

A
  1. Colonization of the intestine
  2. Invasion of the intestinal epithelium
  3. Stimulation of fluid exsorption

(please refer on the ppt for principles of the 3 phases)

21
Q

In diseases of cattle, what species of Salmonellae are the most important?

A
  1. S. dublin (host-adapted)
  2. S. typhimurium (can be found throughout the world)
22
Q

Name the species of Salmonella that affects poultry with the given data:

  • Highly fatal to young chicks during first few days of life
  • Transmission is transovarial
  • Infected eggs may fail to hatch or hatch into infected chicks which if stressed may
    become ill with diarrhea and septicemia
  • Transmission via incubator -> inhalation
  • Chicks huddle near heat source, do not eat, appear sleepy, have diarrhea and die within
    a few hours
    12
  • Meningoencephalitis
  • Caseous areas in lungs, gizzard and heart muscle
A

S. pullorum

23
Q

Name the species of Salmonella that affects poultry with the given data:

  • Fowl typhoid in chickens and turkeys
  • Cross-reacts with S. pullorum
  • Vertical transmission
  • Horizontal transmission through feces, broken eggs and by tick Argas persicus
  • Affects adult birds
  • Weakness, drowsiness, wing drooping, , hyperexcitability, paresis, diarrhea
  • Rapidly developing anemia and leukocytosis
  • birds found dead, hemorrhages in subcutis and parenchymatous organs, multiple small
    necrosis in liver and heart and enlarged spleen
A

S. gallinarum

24
Q

Name the species of Salmonella that affects poultry with the given data:

  • Paratyphoid
  • Enteritis, diarrhea and septicemia
  • Can localize in ovaries and be transmitted via the egg
  • Common in squabs, die soon after hatching or develop swollen wing joints and unable
    to fly (megrims) -> gelatinous exudate in joint capsule
  • Infection in the ovary
A

S. typhimurium

25
Q

What are the immunity methods in poultry against Salmonella ?

A
  1. Cell mediated but facultative intracellular parasite
  2. Live salmonella vaccines, attenuated, bacterins
26
Q

What are the diagnostic methods for Salmonella ?

A
  1. Serology - agglutination test, antiglobulin test, ELISA
27
Q

S. enterica is formerly known as?

A

S. cholerasuis

BACTERIOLOGY & MYCOLOGY LECTURE (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions