Bulls entering Texas must be tested for Trich

March 3, 2009 06:00 PM

Beginning April 1, 2009, breeding bulls entering Texas from any other state must be either 24 months of age or younger and certified as a virgin, or be tested negative for cattle trichomoniasis within 30 days prior to entry. 

The entry requirements are part of a regulatory package adopted by the commissioners for the Texas Animal Health Commission (TAHC) February 24 to address trichomoniasis, a venereal disease of cattle that causes infertility and abortions,  and results in extended breeding seasons and diminished calf crops, which costs livestock producers valuable income.  The second phase of the program, which will address in-state movement of Texas breeding bulls, will go into effect January 1, 2010.

Industry groups worked together to gather information, consider comments and develop the regulation.to make the program workable for the producers, according to the TAHC release.

"The regulatory components of the Texas' Cattle Trichomoniasis Program will focus only on breeding bulls, which, even when infected, continue to appear and act normally. Under the new regulations, Trichomoniasis also becomes a reportable disease in Texas, which will give us more information on where and how much infection already is in the state,” explained Bob Hillman, executive director of the TAHC, the state's livestock and poultry health regulatory agency.  "There is no effective treatment or vaccine for bulls, and as they age, the surface of their organs becomes more hospitable to the protozoa, perpetuating the infection.

"Although the primary impact of the disease is on cows, which can become infected during breeding and lose the fetus, the cow herd is not included in the regulations.  The majority of infected cows will clear the infection, if they are given 120 – 150 days of sexual rest.  A vaccine also can be administered to infected cows to help control the disease in the cow herd. The majority of producers who commented on the proposed rule and members of the working group recommended that the disease in the cow herd be managed through information and education efforts.  Producers with infected herds should consult with their veterinarian to determine the most appropriate measures to employ to eliminate the disease from their herds.”                   

Interstate, or state-to-state movement, phase of the trichomoniasis regulations will begin April 1, 2009. Breeding bulls entering Texas must be officially identified, and may come certified as virgins, provided they are 24 months of age or younger, and have not commingled with female cattle.  A breeder's certificate must accompany the virgin breeding bull, signed by the breeder, and the information also must be included on the certificate of veterinary inspection. Routine documents also are required, including the certificate of veterinary inspection, and other applicable tuberculosis or brucellosis entry requirements must be met, depending on the state of origin, or if the bull is a beef or dairy animal.

Non-virgin breeding bulls or bulls older than 24 months of age entering Texas on and after April 1 must be tested negative for trichomoniasis within 30 days prior to entry.  During the test period and prior to shipment, the bulls must have no contact with female cattle. Like virgin bulls, the non-virgin bulls must be officially identified with a breed registry tattoo or brand, a USDA metal ear tag, official RFID tag, official trichomoniasis ear tag from the state of origin, or other official identification.  The animal must be accompanied by a completed trichomoniasis test document, certificate of veterinary inspection and other routine health documents.

In-State breeding bull regulations will begin Jan. 1, 2010. This is the second phase of the Texas Cattle Trichomoniasis Program and will require that Texas breeding bulls offered for sale, lease, exchange or otherwise change possession for breeding within the state be certified as virgin bulls or be tested negative prior to selling, loaning, exchanging, giving or otherwise changing the possession of a breeding bull.  (No test or certification is required for bulls shipped or sold directly to slaughter.)

When the program is implemented, Texas breeding bulls undergoing change of possession must be officially identified with a USDA ear tag, official RFID tag, or breed registry tattoo or brand.  The animals may be certified by the breeder to be virgins until the age of 24 months, as indicated by the presence of the animal's two permanent central incisors in wear, or more simply, by the birth date recorded on the animals' breed registry papers.  The bull's virgin status can be extended to 30 months, which was requested by commenters, provided the breeder and the herd's accredited veterinarian certify on a breeder's certificate that the bull facility is sufficient to prevent contact with female cattle. 

The testing requirements for non-virgin bulls in Texas require only one PCR (Real Time Polymerase Chain Reaction test) on the non-virgin bull undergoing a change of possession, or alternatively, three consecutive culture tests, each conducted not less than seven days apart. 
Dr. Hillman noted that samples for testing must be collected by accredited veterinarians certified to conduct cattle trichomoniasis work, and tests will be run at the Texas Veterinary Medical Diagnostic Laboratory (TVMDL). "Seminars will be offered around Texas for accredited veterinarians to become certified, to ensure that the collection methods, paperwork completion, sample submission, disease reporting and management of infected bull herds  are uniform throughout the state,” said Dr. Hillman.

"Payment for sample collection and laboratory costs will be the responsibility of the producer,” explained Dr. Hillman.  Bulls of unknown status may be sold for breeding with one negative RT-PCR test or three negative culture tests, each conducted not less than one week apart. The breeding bulls must remain separated from female cattle during the testing.  Negative test results will be valid for 30 days, but only if the tested breeding bulls continue to be separated from heifers or cows.                      

"Infected bulls will be restricted to movement for slaughter only, as there is no effective treatment for this disease,” said Dr. Hillman.  "The remaining bulls in the herd will be held, isolated from female cattle, until they are tested, at least once more by PCR test, or twice more by culture, each culture conducted at least a week apart.  If the remaining bulls test negative (each non-virgin bull in an infected herd must have at least two consecutive negative RT-PCR tests or at least three consecutive negative culture tests in order to be classified as negative), they are free to move.”

To read full report from the Texas Animal Health Commission, follow this link.

For questions or comments, e-mail Kim Watson, editor Beef Today.
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