Table 1. Prevalence of Giardia spp and Cryptosporidium spp in feces of cattle from 55 dairy farms in Paraná, Brazil, from 2012 to 2014.
| Age Group (months) | Number of samples | Giardia spp. | Cryptosporidium spp. | ||
|---|---|---|---|---|---|
| OM (%) | nPCR 18S (%)a | OM (%) | nPCR 18S (%)a | ||
| 0–2 | 146 | 25 (17.1) | 15 (60) | 37 (25.3) | 34 (91.9) |
| 2–4 | 133 | 15 (11.3) | 13 (86.7) | 9 (6.8) | 7 (77.8) |
| 4–6 | 99 | 6 (6.1) | 5 (83.3) | 8 (8.1) | 6 (75) |
| Total (0 a 6) | 378 | 46 (12.2) | 33 (71.7) | 54 (14.3) | 47 (87) |
| 6–12 | 81 | 6 (7.4) | 6 (100) | 5 (6.2) | 3 (60) |
| 12–24 | 54 | 0 | 0 | 6 (11.1) | 1 (16.7) |
| >24 | 424 | 19 (4.5) | 9 (47.4) | 30 (7.1) | 13 (43.3) |
| Total (> 6 months) | 559 | 25 (4.8) | 15 (2.7) | 41 (7.3) | 17 (3.0) |
| Total (All) | 937 | 71 (7.6) | 48 (67.6) | 96 (10.2) | 64 (66.7) |
a Percentage calculated using the number of positive data from optical microscopy (OM). nPCR: nested PCR, 18S: 18S rRNA gene.