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Prevalence of Cryptosporidium spp. in each age group of newborn dairy calves.
| Age group | Microscopic detection (%) | Nested PCR detection (%) |
|---|---|---|
| Group I (1-7 days old) | 25/50 (50.0) | 13/50 (26.0) |
| Group II (8-14 days old) | 22/50 (44.0) | 12/50 (24.0) |
| Group III (15-21 days old) | 30/50 (60.0) | 9/50 (18.0) |
| Group IV (22-28 days old) | 24/50 (48.0) | 8/50 (16.0) |
PCR=Polymerase chain reaction
