Cattle Tuberculosis Confirmed in Texas Panhandle Dairies

Texas Animal Health Commission
January 13, 2015
Cattle Tuberculosis Confirmed in Texas Panhandle Dairies

AUSTIN – The Texas Animal Health Commission (TAHC) has confirmed Cattle tuberculosis (TB) in two Texas
Panhandle dairies located in Castro County. The infected herds are under quarantine and will remain so until the
herds meet all requirements for quarantine release through testing and removal of infected animals. Dairy, calfraising
and dairy heifer raising operations in Texas and other states with epidemiological links to the infected
herds will be tested to determine the possible origin or potential spread of the disease.
Cattle tuberculosis is a chronic debilitating respiratory disease whose symptoms can include progressive weight
loss, chronic cough, and general loss of condition. Like many other diseases, TB transmission is facilitated when
animals are concentrated or held in close confinement. Infected animals normally spread the TB bacteria to their
herd mates by expelling infective droplets into the air which are inhaled, or contaminate feed.
A variety of other species are susceptible to TB, including elk, deer, bison, goats, swine, cats and humans. Sheep
and horses are rarely affected. Although TB can affect humans, pasteurization of milk removes any risk of
transmission, and meat from infected animals does not enter the food chain.
Tuberculosis has a long incubation period (months to years) and was once the most prevalent infectious disease
of cattle and swine in the United States. Cattle 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.
In 2000, Texas finally earned USDA TB accredited-free status. In 2002 however, that status was temporarily
revoked when two infected cattle herds were detected. After extensive testing, Texas regained its TB-free status
from USDA in October 2006. This effort included testing over 2,000 purebred beef operations and all of the
state’s dairies. Slaughter surveillance and identification practices for dairy cattle necessary to aid in tracing of
high risk cows was also greatly enhanced at that time.
Dr. Dee Ellis, Texas State Veterinarian said, “The detection of these new herds simply indicates our strong
surveillance system is effective. The TAHC is working closely with the dairies involved and the Texas dairy
industry to ensure the disease is quickly contained, and the affected dairies can return to normal business
practices as soon as possible.” Texas’ current TB-free status is not expected to be affected by the new
disclosures.
For information about TB in the Panhandle, contact the Region 1 office at 1-806-354-9335. For general
information about TB, call 1-800-550-8242 or visit
http://www.tahc.texas.gov/animal_health/cattle_tb/cattle_tb.html
Founded in 1893, the Texas Animal Health Commission works to protect the health of all Texas livestock,
including: cattle, swine, poultry, sheep, goats, equine animals, and exotic livestock.