Table 2. Fecal egg count reduction (FECR) of Cooperia oncophora (C. o.), C. punctata (C. p.) and Ostertagia ostertagi (O. o.) after treatment of cattle with ivermectin pour-on.
| Farm No. |
Year | Month | Na) | Larval culture Day 0 | FECR%b) | Larval culture Day 14 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C. o. | C. p. | O. o. | Others | C. o. | C. p. | O. o. | Others | C. o. | C. p. | O. o. | Others | ||||
| 1 | 2009 | May | 16 | 77% | 8% | 14% | 1%c) | 85 | 86 | 98 | 86 | 88% | 9% | 2% | 1%c) |
| (71–92) | (72–93) | (96–99) | (72–93) | ||||||||||||
| August | 16 | 65% | 12% | 23% | 1%d) | 56 | 0 | 100 | 100 | 60% | 40% | 0% | 0% | ||
| (0–81) | (0–30) | ||||||||||||||
| 2010 | August | 20 | 86% | 5% | 9% | 0% | 28 | 0 | 100 | – | 81% | 19% | 0% | 0% | |
| (0–65) | (−29–0) | ||||||||||||||
| 2 | 2009 | September | 12 | 57% | 7% | 28% | 9%c) | e) | e) | e) | e) | ||||
a) Number of animals. b) The 95% confidence intervals are given in parentheses. c) Mecistocirrus digitatus. d) Oesophagostomum radiatum. e) Percent reduction not calculated because of insufficient larvae at day 14.