Diarrhea in Calves & Adult Cattle

Question 1

How is Johne’s Dz transmitted and when do we usually see clinical signs? Where does the organism localize?

Answer 1

Fecal-oral route

clinical signs (dz) @ 2-5 years

localizes in small intestinal mucosa & associated LNs

Question 2

What is the gold standard for diagnosing Johne’s dz? & what sucks about this process?

Answer 2

• *fecal culture…**
• takes up to 16 weeks…*

Question 3

What are some other causes of diarrhea in adult cattle?

Answer 3

• Copper deficiency
• ostertagiasis
• coccidiosis {weaned calves}
• rumen acidosis
• Clostridium perfringes types A & B
  {pulpy kidney /enterotoxemia in sheep}