Tuesday, October 4, 2016

Parasite Resistance: Top 10

Parasite resistance is quantified by fecal egg counts (EPG):  average and high.  Five goats met the traditional (Gold, Silver, or Bronze) standards for parasite resistance. The Gold standard is an average FEC below 500 epg and the high FEC below 1000 epg. Only one buck met this standard: David Peters's 661. David (North Carolina) had last year's most resistant buck.

The Silver standard is an average FEC below 750 epg and the high FEC below 1500 epg. One buck met this standard:  699 (Yutzy, Ohio). The Bronze standard is an average FEC below 1000 epg and the high FEC below 2000 epg. Three more bucks met this standard:  687 (Weber, IL), 648 (Murphy, NJ), and 616 (Davis, MO).

Six of the most resistant bucks in the test were top 10 performers. The other four had other disqualifying data, such as low rate-of-gain or need for anthelmintic treatment. Only bucks with four samples or more were considered for top 10 ranking in parasite resistance.

Waldo Nelson from Maryland had two of the ten most resistant bucks in the test. Waldo has had resistant bucks in other tests.

Top 10 Most Resistant Bucks
Rank Consigner ID No. samples Avg. FEC High FEC # Tx
1 Peters* 661 5 364 920 0
2 Yutzy* 699 5 628 1250 0
3 Weber* 687 5 775 1700 0
4 Davis* 616 5 784 1525 0
5 Murphy* 648 5 830 1650 0
6 Nelson 652 4 1016 2500 0
7 Jarrett 634 4 1088 2450 1 (Lev)
8 Larr* 638 5 1342 4286 0
9 Nelson 654 5 1374 4225 0
10 Pritchett 668 4 1397 1600 1 (COWP)
*Top 10 buck

Being one of the most resistant bucks (especially top 5) is especially noteworthy this year, as the highest ever fecal egg counts were recorded. Egg counts may have gone even higher if a sample had been collected on September 29 (though all the goats were given 1 g bolus of COWPs, which may have kept egg counts from going even higher).