Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

VET413 Infectious + Immunology > 9+10 Enteric Bacteria > Flashcards

9+10 Enteric Bacteria Flashcards

(60 cards)

Start Studying
1
Q

T or F: Enterobacteriaceae are G- rods.

A

True

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

What are two major enteric and systemic pathogens from family enterobacteriaceae?

A

E. coli
Salmonella spp.

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

_______ are important opportunistic pathogens from family enterobacteriaceae.

A

Klebsiella spp.

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

E. coli (is/is not) lactose fermenting and will appear _____ on MacConkey agar.

A

Is; pink

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

Salmonella spp. (are/are not) lactose fermenting and will appear ______ on MacConkey agar.

A

Are not; colorless to grey

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

E. coli is gram (+/-) and is a _______ anaerobe.

A

G-; facultative anaerobe.

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

What is the difference between an endogenous and an exogenous E. coli infection?

A

Endogenous infections are from the animal’s normal flora; exogenous infections are from the ingestion of contaminated food/water.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the function of an enterotoxin?

A

To deregulate water and electrolyte secretion from affected host cells.

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

What are the names of the three clinical presentations of coliobacillosis?

A
  1. Enterotoxigenic (ETEC)
  2. Enteropathogenic (EPEC)
  3. Enteroinvasive/extraintestinal (EIEC)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the causitive agent of edema disease in postweaning pigs?

A

E. coli (ETEC)

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

What species are the greatest concern for ETEC infection?

A

Neonatal pigs, lambs, calves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What type of diarrhea does ETEC cause?

A

Secretory

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

Histologically, what will an intestinal ETEC infection look like?

A

Morphologically normal epithelial cells.

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

What is the method of virulence in ETEC?

A

Colonization and toxin secretion

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

What are the species likely to present with EPEC infection?

A

Pigs, dogs, rabbits, cats, calves

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

What type E. coli produces shiga toxin?

A

EPEC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the method of virulence in EPEC?

A

Attachment and effacement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What type of diarrhea does EPEC cause?

A

Malabsorption (epithelial cells so damaged they cannot absorb)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What will an EPEC infection look like histologically?

A

Degenerating enterocytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What species are affected by EIEC?

A

All of them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the method of virulence in EIEC?

A

Endotoxin (LPS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What type of diarrhea does EIEC cause?

A

None, because it is systemic or extraintestinal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What strains are responsible for ETEC?

A

K99 and F5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What demographics of poultry are colibacillocis most commonly observed in?

A
  1. Embryos/neonates
  2. Older birds
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
T or F: you can vaccinate animals against virulent E. coli during pregnancy.
T
26
Salmonella are gram (+/-) and are (rods/cocci).
G-, rods.
27
What are the two major species of salmonella?
S. bongori and S. enterica
28
T or F: Salmonella infection is always symptomatic.
F; it is commonly asymptomatic
29
Which causes more severe disease, adapted or non-adapted serotypes of Salmonella?
Adapted
30
What kind of cells do Salmonella adhere to in the intestine?
M cells and epithelial cells
31
After adhering, how do Salmonella get inside of intestinal cells?
Injection of secretion system effectors and internalization
32
Where within an intestinal cell does Salmonella replicate?
Lysosome
33
Does Salmonella kill the cells that it infects?
Yes, it eventually causes apoptosis or necrosis
34
What are the two main clinical forms of salmonellosis?
Enteric salmonellosis Systemic salmonellosis
35
What species and ages are most commonly affected by enteric salmonellosis?
Farm animals of all ages
36
What are the clinical signs associated with acute enteric salmonellosis?
Fever, depression, anorexia, diarrhea (+/- blood, mucus, fibrin casts)
37
What are the clinical signs associated with chronic enteric salmonellosis?
Intermittent fever, soft stool, gradual weight loss
38
On necropsy, what will you see with an enteric Salmonella infection?
Evidence of diarrhea Fibrinonecrotic enteritis/colitis Enlarged mesenteric LNs Enlarged liver Intestinal button ulcers
39
What species and ages are most commonly affected by systemic salmonellosis?
Farm animals, usually neonates <4 weeks
40
T or F: Salmonella does not cause abortion.
F, some strains of Salmonella and systemic salmonellosis can cause abortion
41
On necropsy, what will you see with a systemic Salmonella infection?
Enlarged liver Enlarged spleen Serosal or adrenal hemorrhage Cholecystitis Icterus
42
What are the types of salmonellosis in poultry?
Paratyphoid Pullorum disease Typhoid
43
What serovars(s) of Salmonella cause paratyphoid salmonellosis in poultry?
Enteritidis and Typhimurium
44
What age of chickens tend to be affected by paratyphoid salmonellosis?
Young chicks <2 weeks
45
What is the primary clinical consequence of paratyphoid salmonellosis?
Septicemia
46
What serovar(s) of Salmonella cause Pullorum disease?
Salmonella Pullorum
47
T or F: Pullorum disease is common in North America
False
48
What type of poultry are most likely to be affected by Pullorum disease or Typhoid salmonellosis?
Backyard poultry
49
What is the primary clinical consequence of Pullorum disease?
Septicemia
50
How is Pullorum disease spread?
Ova of turkey and chicken are infected and the infection spreads when affected eggs hatch
51
What serovar(s) of Salmonella cause typhoid salmonellosis?
Gallinarum
52
Typhoid salmonellosis is a _______ (chronic/acute) disease process.
Chronic
53
What is the primary clinical consequence of typhoid salmonellosis?
Septicemia
54
What do Klebsiella colonies look like?
Mucoid (like snot!)
55
Does Klebsiella have a capsule?
Yes
56
What types of toxins do Klebsiella produce?
Endotoxin and enterotoxin
57
Klebsiella causes what kind of disease(s) in cows?
Bovine mastitis
58
Klebsiella causes what kind of disease(s) in horses?
Septicemia, reproductive tract disease, and navel ill
59
Klebsiella causes what kind of disease(s) in reptiles and some wildlife?
Septicemia, hypopion, and pneumonia
60
According to the Kauffman-White serotyping scheme, what antigens are present on Salmonella spp?
O antigen (LPS) H antigen (flagella) K antigen (capsule)

VET413 Infectious + Immunology (26 decks)

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