tional cultures or 1 additional PCR test with negative results is conducted within 60 days of the initial evalu- ation. If a bull shows positive in the last required test, the owner may fi le a request with TAHC for a retest if it is believed that a mistake was made. Retests must be done within 30 days of the original test.”
Prevalence and economic signifi cance “In Texas, approximately 2 percent of the bulls tested
for trich show positive results,” says Ellis. “The number remains fairly constant from year to year regardless of program changes. One reason for this consistency is that a bull is not required to be tested unless ownership changes. If more animals were tested, the percentage would probably be closer to 10,” Ellis suggests. “Another reason for the consistency is that second
and third tests on a bull are often negative, which re- duces the recorded number of positives.” Producers who have experienced trich in their
herds know just how costly the disease can be. For example, an Oklahoma client of The Samuel Roberts Noble Foundation hired a ranch manager at the end of calving season last spring. The new manager noticed that 25 percent of the cow herd didn’t calve. To help
The disease causes early pregnancy loss and occasional late-term abortions.
determine the reason for this low birth percentage, he tested the bulls for fertility and trich. One bull tested positive for trich and was immediately
retested. The second test was negative. Although the bull had produced good calves, he was sold for slaughter to reduce the risk of spreading trich in the herd. The open cows were allowed to go through 4 heat
cycles before rebreeding to allow them enough time to clear the organism. This single disease incident cost the producer his best herd bull, 25 percent fewer calves to sell, the cost of testing, and the manager’s time required for dealing with the disease. Drs. David Anderson and Stan Bevers, agricultural economists with Texas A&M AgriLife Extension Ser-
830-426-4175 800-467-3274
Hondo, TX 78861
DROUGHT INSURANCE FOR HAYLAND AND RANGELAND CALL AN AGENT NEAR YOU:
Tootie Ilse Hondo, TX 830-317-4175
Dan Kinsel Cotulla, TX 830-317-0115
96 The Cattleman October 2014
Sweetie McNair Driscoll, TX 361-816-7353
å
Donna Schuster Brackettville, TX 830-591-6147
Waylon Koch La Vernia, TX 210-724-7722
Connie Giesenschlag Caldwell, TX
979-272-1084
Adrian Perez Freer, TX
361-207-0180
Dennis Dick College Station, TX 979-255-3986
Joby Langfeld Hondo, TX
210-416-4130
thecattlemanmagazine.com
DEADLINE
NOVEMBER 15, 2014 for 2015 policy year
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