From February to September 1993, ten adult female mouflons (Ovis musim
on) and their five offspring from central Spain were examined weekly f
or coccidial infection. All adult mouflons had Eimeria spp. infections
with mean (+/-SD) intensity of 1,869 (+/-1,264) oocysts per gram of f
eces the day of capture, increasing progressively during the first two
months in captivity and later returning to the initial values (1,869
+/- 1,547). The mean (+/-SD) oocyst shedding in young animals was 16,8
00 (+/-966) oocysts per gram at 1 mo and 18,796 (+/-1,220) at 1.5 mo o
f age and more than 40,000 (40,250 to 52,000) at 3 mo of age; this hig
h intensity was associated with a transient diarrhea. The species invo
lved, in order of frequency, were E. bakuensis (syn. Eimeria ovina), E
. ovinoidalis, E. crandallis, E. caprovina, E. parva, E. faurei, E. gr
anulosa and E. intricata, and one more not previously described and re
corded as Eimeria sp.. The predominant species for both age groups was
E. bakuensis.