A. Entire life cycle is approximately 14 days.

B. Diagnosis of coccidiosis is by fecal sample. The amount
of coccidia oocysts are within the intestinal cell walls.
When calves have diarrhea, some oocysts are released.
Part of the diarrhea is because when the oocysts are
released the intestinal cell is destroyed which prevents the
cell from being able to reabsorb liquid. When fluid in the
gut is not absorbed the nutrients are also not absorbed.

A. Young, nonimmune animals exposed to manure
B. Stress created by shipping, weaning & dietary changes
C. Calves being transitioned from separately hitched to pens or from pens to comfort stalls

Coccidiosis depends on prevalence of oocysts in the environment
A. Decrease oocysts by decreasing exposure to fecal contamination
B. Decreasing stocking rates, by decreasing number per pen
C. Decrease stress
D. Provide clean housing and feed
E. Use feed bunks
F. Slatted floors: decrease calf exposure with manure
G. Oocysts die when dry or exposed to ammonia or methybromide
H. Drugs

1. Amprolium (drug of choice)
2. Decoquinate
3. Diclazuril
4. Lasalocid
5. Monensin

I. Sick calves may need to be treated individually since they may not eat enough to feed additive.