Calf Diarrhea

Question 1

Enterotoxigenic E.coli
- age affected
- dx

Answer 1

• <3-5d
• Fecal culture
• PCR & demonstrate virulence factor

Question 2

C. Perfringens type C
- age affected
-dx

Answer 2

<10d
fecal culture
PCR and demonstrate toxin

Question 3

Rota Virus
- age affected
- dx

Answer 3

5d-2wks
fecal PCR, fluorescent antibody test

Question 4

Coronavirus
- age affected
- dx

Answer 4

5d-1m
- fecal PCR
- can cause severe colonic lesions

Question 5

Cryptosporidium:
- age affected
- dx

Answer 5

• 1wk +
• fecal float

Question 6

Coccidia:
- age affected
- dx

Answer 6

2wk +
fecal float

Question 7

C. Perfringens type A (enterotoxemia)
- age affected
- dx

Answer 7

2-4m
fecal culture

Question 8

Salmonella
- age affected
- dx

Answer 8

• any age affected; 2wk-2m common
• isolation from tissues, fecal culture

Question 9

What are the most common biochemical changes in scouring calves

Answer 9

hyponatremia
hyperkalemia
hyperlactemia