Cattle & Bison Health

Bovine Brucellosis

Brucellosis is a contagious disease of cattle, bison, swine, and other ruminant animals that can also affect humans. The disease in cattle is also known as contagious abortion or "Bang’s disease". In humans, it's known as undulant fever because of the intermittent fever it causes.

In animals, brucellosis can cause decreased milk production, weight loss, loss of young, infertility, and lameness. The disease in cattle is caused by the bacterium Brucella abortus, though other species of Brucella bacteria can cause disease in a variety of other species.

Brucellosis is a zoonotic disease, meaning it can be spread from animals to people, but eradication efforts along with modern sanitary practices and pasteurization of milk products have greatly decreased the frequency of human infections.

Help Keep Texas Cattle Brucellosis-Free!

  • Continue management strategies to prevent the introduction or spread of Brucellosis
  • Don’t buy Brucellosis — abide by testing requirements
  • Vaccinate replacement heifers — 4 to 12 months of age
  • Participate in disease surveillance
  • Report signs of disease — abortions in the herd, weak calves, poor milk production

Rules and Regulations

The Brucellosis regulations are posted on the Secretary of State website.

TAHC Information Resources

Fever Ticks

Cattle Fever Ticks, known scientifically as Rhipicephalus (formerly Boophilus) annulatus and R. microplus, are a significant threat to the United States cattle industry. These ticks are capable of carrying the protozoa, or microscopic parasits, Babesia bovis or B. bigemina, commonly known as cattle fever. The Babesia organism attacks and destroys red blood cells, causing acute anemia, high fever, and enlargement of the spleen and liver, ultimately resulting in death for up to 90 percent of susceptible naive cattle.

For questions about dipping or spraying your livestock, please contact your local TAHC Region Office or USDA County Office.

Cattle Fever Tick Quarantine Areas

Their are three types of Fever Tick Quarantine Areas; The Permanent Fever Tick Quarantine "Buffer" Zone, a Control Purpose Quarantine Area, and a Temporary Preventative Quarantine Area. To learn more about the types of Fever Tick Quarantine Zones and Areas, please visit our Fever Tick Frequently Asked Questions Brochure.

Fever Tick Infestation MapCurrent Infestations (March 2017)
Live Oak County CPQA
A CPQA was established in a portion of Live Oak County on November 30, 2016 after fever ticks were confirmed on a premises in the area. Since the first detection of fever ticks in late November 2016, the TAHC has confirmed a total of nine infested premises in the CPQA.
To learn more about the Live Oak County situation, please read the April 24, 2017 Fever Tick Situation Report.
Live Oak County CPQA Live Oak County CPQA (March 2017)
Jim Wells County CPQA
A CPQA was established in a portion of Jim Wells County on July 8, 2015 after fever ticks were confirmed on a premises in the area.
Jim Wells County CPQA Jim Wells County CPQA (January 2017)
Kleberg County CPQA
A CPQA was established in a portion of Kleberg County on December 6, 2014 after fever ticks were confirmed on a premises in the area.
Kleberg County CPQA Kleberg County CPQA (January 2017)
Cameron County Temporary Preventative Quarantine Area (TPQA)
The Texas Animal Health Commission and the United States Department of Agriculture confirmed the presence of cattle fever ticks on Cameron County premises located outside the permanent quarantine zone in 2014.
In order to protect the land, premises, and animals from exposure to cattle fever ticks, the TAHC created a temporary preventative quarantine area (TPQA) in Cameron County. The TPQA, and its requirements, became effective October 7, 2014. The TPQA was modified on November 17, 2016 and now consists of approximately 200,000 acres. The TPQA will be in effect until all premises within it are released from fever tick quarantines and the area is determined to no longer be at risk of infestation.
Within this area, all livestock (cattle and equine) and live or hunted wildlife (such as nilgai antelope and white-tailed deer) that are capable of hosting fever ticks, are subject to movement restrictions, inspections and treatment as prescribed by TAHC fever tick regulations.
Cameron County Fever Tick Quarantine Area Fever Tick Quarantine Area
Cameron County Fever Tick Response Office – Los Fresnos
105 West Ocean Boulevard
Los Fresnos, TX 78566
Phone: 956-443-6609
Fax: 956-233-1732
Information for Hunters in the TPQA
Landowners, lessees or other individuals that plan to move or hunt/harvest nilgai antelope, white-tailed deer, or other free-ranging wildlife and exotic animals capable of hosting fever ticks located in the TPQA or on quarantined infested, exposed, adjacent or check premises located in the Free Area must have the animals inspected before movement. To read more visit the Wildlife Inspection Requirements.

Rules and Regulations

TAHC Information Resources

Fever Tick Quarantines

Current Fever Tick Quarantine Notices & Maps

Past Fever Tick Quarantine Notices & Maps

Informational Websites


Cattle trichomoniasis or "Trich" is a venereal disease of cattle caused by the Tritrichomonas foetus protozoa, which is about the size of a sperm. Infected bulls carry the organism on their penis and prepuce. Trichomoniasis is then transmitted to cows through breeding. Cows may abort early in the pregnancy and become temporarily infertile. Only testing will confirm the presence or absence of the disease.

Cattle producers can lose valuable income from the extended breeding seasons and diminished calf crops caused by this disease. The cattle industry and trade associations in Texas requested that the Texas Animal Health Commission develop regulations to stop the introduction and spread of this disease.

TAHC’s Trichomoniasis regulations were developed with a working group of producers, market operators, veterinarians, laboratory representatives and educators. Under the program that was phased in beginning April 2009, Trichomoniasis is a reportable disease in Texas. The program will be reviewed annually by the Trichomoniasis Review Working Group.


The Trichomoniasis regulations are posted on the Secretary of State website. Bison are excluded from these regulations.

TAHC Information Resources

For Producers: Find a Trichomoniasis Certified Veterinarian

View a list of veterinarians that have authorized TAHC to publish their information. To determine if a veterinarian not listed is TAHC Bovine Trichomoniasis Certified, please call your TAHC Region Office.

Cattle Tuberculosis

Tuberculosis (TB) is a chronic, debilitating disease of cattle and bison caused by the bacterium Mycobacterium bovis. Human tuberculosis is caused by a closely related type of bacteria and was historically known as "consumption". A variety of other species may be susceptible to cattle tuberculosis, including captive elk and exotic deer, bison, goats, swine, man and cats. Sheep and horses are rarely affected.

TB is primarily a respiratory disease affecting lungs and chest lymph nodes. Symptoms can include progressive weight loss, chronic cough, and unexplained death losses.

TB has a long incubation period (months to years) and was once the most prevalent infectious disease of cattle and swine in the United States. Bovine TB caused more losses among U.S. farm animals in the early part of this century than all other infectious diseases combined. Through a cooperative state-federal program, bovine tuberculosis has been nearly eradicated from livestock in the US. Texas has been declared free of TB, but constant vigilance is crucial to maintaining that TB-free status.


The Tuberculosis regulations are posted on the Secretary of State website.

TAHC Information Resources

Information Websites