Bovine Tuberculosis Testing Requirements in Kentucky: What Every Cattle Producer Must Know
August 12, 2026
Bovine tuberculosis testing requirements in Kentucky apply to far more than large commercial dairies. Anyone who sells, trades, exhibits, or moves cattle, bison, or other bovine species across the Commonwealth’s borders needs to understand when a tuberculin test is required, which paperwork proves it, and what happens if an animal reacts to the test.
Kentucky has not recorded tuberculosis in wild deer or other wildlife, and the state has operated a formal accreditation program for cattle, bison, and cervid herds for decades. Still, the rules governing testing, movement documents, and quarantine are detailed enough that producers, haulers, and show exhibitors regularly run into compliance questions. This guide walks through what triggers a test, which methods are approved, and what enforcement looks like when something goes wrong.
What Is Bovine Tuberculosis and Why It Is Regulated in Kentucky
Bovine tuberculosis is caused by the bacterium Mycobacterium bovis, a slow-growing pathogen closely related to the organism that causes human tuberculosis. Bovine tuberculosis is a contagious, infectious, communicable disease of animals and humans caused by Mycobacterium bovis, and it is commonly a chronic, debilitating disease but occasionally may assume an acute, rapidly progressive course. Disease is spread by direct contact, inhalation of droplets expelled from infected lungs, and ingestion of contaminated feed or milk.
The federal response to this disease is old and deliberate. In 1917, the U.S. Bureau of Animal Industry began the National Tuberculosis Eradication Program, and APHIS and State animal health agencies have since collaborated with producers to administer a program that has nearly eradicated tuberculosis from the nation’s livestock population. Kentucky’s own regulations exist because state law gives the Kentucky Board of Agriculture direct authority over the problem: KRS 257.030 authorizes the board to establish necessary quarantines and other measures to control the movement of animals into, through, or within Kentucky.
Because bovine TB can pass to people through unpasteurized dairy or close contact with infected animals, and because a single confirmed herd can trigger trade restrictions, testing is treated as a public health and market-protection tool rather than routine paperwork. For background on how this disease compares with other conditions affecting cattle, see this overview of bovine disease in general.
Kentucky’s TB Classification Status and Risk Zones
Kentucky does not operate under any internal modified-accredited zones the way a handful of states with recent outbreaks do. According to the Kentucky Department of Agriculture, Kentucky became a Tuberculosis Free state in November 1987, and the state has maintained voluntary accreditation programs for cattle, bison, and cervid herds ever since.
Important Note: Federal regulations at 9 CFR Part 77 list Kentucky among a large group of states carrying a “modified accredited” designation within certain species-specific classification tables, which can create confusion when cross-referenced against state program descriptions. Because federal classification tables are updated periodically and apply differently to cattle versus captive cervids, producers should confirm current status directly with the Kentucky Office of State Veterinarian before relying on any single source.
Wildlife surveillance backs up the state’s low-risk profile. Kentucky has no history of tuberculosis infection in deer or other wildlife, and while it is possible to transmit bovine TB from animals to people, the likelihood is extremely rare. The most recent confirmed cattle case tied to Kentucky was notable mainly because of how rare it was: it was the first positive case in Kentucky since 1987, and wildlife surveillance around the affected premises did not detect any additional infected wildlife. That case coincided with a 2016 finding in Southeastern Indiana, where bovine TB was detected on a cattle farm consisting of two premises, and a wild white-tailed deer doe removed from the affected premises tested positive for bovine TB — the first such wildlife finding in Indiana. Hunters who spot suspicious lesions while field dressing deer near the Kentucky-Indiana border can report them through channels described on the hunting license requirements in Kentucky page, since license holders are often the first line of wildlife disease surveillance.
Who Must Test and Which Animals Are Covered in Kentucky
Testing obligations depend on species, purpose of movement, and herd history rather than farm size. The core rule set lives in 302 KAR 20:040, which governs entry into Kentucky, and covers:
- Cattle and other bovine species — a person shall not import an exotic ruminant or bovine unless the animal tests negative on an official tuberculin test as provided in 9 C.F.R. 77.5 and conducted not more than sixty days prior to entry date, except as otherwise provided.
- TB-accredited herds — exempt from that entry test, since animals originating from a tuberculosis accredited herd shall be exempt from testing, and the herd accreditation number and date of last herd test shall be indicated on the CVI.
- Goats — testing shall not be required for sale and exhibition if Kentucky has class free status.
- Captive cervids — must meet whole-herd or accreditation standards, and tuberculosis must not have been diagnosed within Kentucky in any class of cervids in the previous five years for certain movement categories to qualify.
Every covered animal generally travels with a Certificate of Veterinary Inspection. All animals shall be accompanied by a Certificate of Veterinary Inspection (CVI) or other official movement document, except for listed exemptions, and examples of an official movement document include a way bill with a permit number or Federal Movement Form VS 9-3 or VS 1-27. Anyone hauling animals to meet these requirements should also confirm their equipment meets the livestock trailer requirements in Kentucky, since movement documents and vehicle standards are typically checked together at sale barns and inspection points.
Approved TB Testing Methods in Kentucky
Kentucky follows the federally recognized testing sequence rather than a separate state protocol. In cattle, the standard method for detection of bovine TB in live animals is the tuberculin skin test, performed by a licensed, accredited, and TB-certified veterinarian. Diagnosis in live animals depends on using an effective testing technique with an intradermal injection of tuberculin obtained through a State animal health official or APHIS-VS Area Offices.
| Test | Type | Reading Window | Purpose |
|---|---|---|---|
| Caudal Fold Test (CFT) | Screening | 72 ± 6 hours | Initial herd or entry screening |
| Comparative Cervical Test (CCT) | Confirmatory | 72 hours | Follow-up on CFT responders |
| Gamma Interferon (BOVIGAM) | Confirmatory blood test | Same-day lab turnaround | Alternative to CCT for reactors |
| PCR / Culture | Laboratory confirmation | Hours (PCR) to weeks (culture) | Final confirmation on suspect tissue |
The first test used to detect possible carriers of bovine tuberculosis is the Caudal Fold Tuberculin test, in which a small amount of purified protein derivative tuberculin is injected into the fold of skin at the base of the tail, and the test is read 72 plus or minus 6 hours later. A false positive rate of one to two percent is expected during a whole herd test, so a single reactor does not automatically mean an infected animal.
Animals that respond to the CFT move to a second tier of testing. Responders to the screening test require secondary testing, where a Comparative Cervical Tuberculin test must be performed within 10 days, or after 60 days, of the CFT by a regulatory veterinarian, consisting of two injections given in the skin of the neck — one of bovine tuberculin extract and one of avian tuberculin extract. A gamma interferon blood test can substitute for the CCT in some cases, though the test is expensive, at $8 to $10 per head, and the blood is difficult to handle.
Pro Tip: Only USDA-accredited veterinarians can perform official tuberculin tests, and follow-up testing must be handled by a regulatory veterinarian with specialized training. Schedule testing well ahead of a sale, show, or interstate move so results are on file before the CVI needs to be issued.
Interstate and Intrastate Movement Testing Requirements in Kentucky
Movement rules split into two tracks: bringing animals into Kentucky and moving animals within the state. For entry into Kentucky, the sixty-day pre-entry test described above applies unless the animal comes from an accredited herd. For intrastate sale, change of ownership, or exhibition, 302 KAR 20:065 sets the standard:
- Confirm herd status first. If the animals are from a tuberculosis accredited herd, testing is not required for sale or exhibition, but the herd number and last test date must be recorded on the CVI.
- Check the state’s class-free status. Testing shall not be required for sale or exhibition if Kentucky has class free status.
- Secure a CVI for the sale, exhibition, or ownership change. Cattle or other bovine species moving intrastate for sale, exhibition, or change of ownership must be accompanied by a valid CVI as required by 302 KAR 20:020.
- Use the farm-to-farm exemption carefully. Cattle sold or bartered by private treaty and moving directly from farm to farm are exempt from the CVI requirement only if the seller’s name and premises of origin information are recorded and maintained for two years by the recipient.
Cattle and bison from states that already carry the top federal classification move with minimal friction. Cattle or bison that originate in an accredited-free State or zone may be moved interstate in accordance with 9 CFR part 86 without further restriction under this part. Animals coming from a quarantined herd or area face the opposite situation: an animal that originated from a quarantined area or quarantined herd shall not be transported intrastate within Kentucky unless permitted by the Office of State Veterinarian on VS Form 1-27 or a CVI with a quarantine movement permit attached.
What Happens When a Suspect or Positive Result Occurs in Kentucky
A reactor on a screening test is a starting point, not a diagnosis. A test is recorded as “suspect” when an examiner observes or palpates any increase in caudal fold thickness, size, or sensitivity at the injection site, since exposure to bovine TB antigens produces a delayed hypersensitivity reaction manifested by swelling and induration. If the test produces any type of response, the veterinarian must immediately notify the APHIS-VS Area Office and State animal health officials.
From there, the animal moves into confirmatory testing. The caudal-fold test is used as a presumptive diagnostic procedure, and animals classified as suspect must be evaluated further by the comparative cervical test, gamma interferon test, or sent directly to slaughter under permit, with only Federal or State regulatory veterinarians who have had specialized training authorized to conduct that follow-up testing. Timing matters here: follow-up CCT testing must be performed within 10 days of the initial caudal-fold injection in cattle and bison, or the herd owner must wait 60 days — 90 days for cervids — after the CFT before a follow-up CCT can be applied.
If secondary testing is also positive, the animal is classified as a reactor and the case escalates to herd-level action. Animals that test positive on secondary skin testing require further testing and may need to be slaughtered to determine if they are infected with bovine TB. Postmortem inspection remains the backbone of confirmation nationwide, since the primary source of tuberculosis surveillance is carcass inspection at all Federal and State inspected slaughter establishments.
Quarantine and Herd Depopulation Rules in Kentucky
Once a reactor is confirmed, the entire herd — not just the individual animal — comes under restriction. All herds in which reactor animals are disclosed shall be quarantined immediately, and exposed animals must remain on the premises where disclosed unless a State or Federal permit for movement has been obtained. Even movement to slaughter is tightly controlled during this period: movement of animals for immediate slaughter must be shipped directly to a slaughtering establishment.
Depopulation, while disruptive, is the preferred path when a herd is confirmed affected. Exposed animals previously sold from a known-affected herd shall be depopulated with indemnity if at all possible. After depopulation, restocking a premises is not immediate. In a newly assembled herd on premises where a tuberculosis-affected herd has been depopulated, two negative annual herd tests shall be applied to all cattle, bison, and other livestock, with the first test applied approximately six months after assembly of the new herd. This mirrors the federal standard that tests must be conducted at 9 to 15 month intervals during the recovery period on affected premises.
Penalties for Non-Compliance in Kentucky
Kentucky’s enforcement authority for tuberculosis testing rests on the same statutory base as the testing rules themselves. KRS 257.070 requires that importation of animals into Kentucky comply with administrative regulations promulgated by the board, and KRS 257.030 authorizes the board to establish necessary quarantines and other measures to control the movement of animals into, through, or within Kentucky — meaning a violation of testing or movement rules is a violation of state law, not just an administrative inconvenience.
Reporting failures carry their own separate obligation. Every veterinarian, veterinary practice, diagnostic laboratory, owner of livestock, and other person with knowledge of a reportable disease must immediately report the disease or condition to the State Veterinarian, and conditions such as an unusual number of acute deaths in livestock or highly infectious conditions of any etiology, known or unknown, must be reported immediately.
Important Note: Specific civil or criminal penalty amounts for violating Kentucky’s livestock health and movement regulations are set through enforcement provisions tied to KRS Chapter 257 and are subject to change. Producers who receive a quarantine notice, movement violation, or reporting citation should contact the Kentucky Office of State Veterinarian directly to confirm current penalty schedules rather than relying on general summaries.
Beyond direct fines, non-compliance carries practical consequences: a CVI issued without required testing can be invalidated, sale barns and stockyards can refuse an animal without proper documentation, and interstate buyers can reject shipments that lack a valid movement permit. Producers who also handle other regulated species should keep in mind that similar documentation habits apply elsewhere in Kentucky animal law, including rabies vaccine requirements for cats and other companion-animal rules enforced by separate state agencies.
Staying compliant with Kentucky’s bovine tuberculosis testing framework comes down to three habits: confirm herd accreditation or class-free status before assuming an exemption, keep CVIs and test records current for at least as long as the regulation requires, and report anything unusual immediately rather than waiting to see if a reactor result resolves on its own. Given how rare confirmed cases have been in Kentucky since 1987, the testing and paperwork requirements exist specifically to keep that record intact — for producers, that means treating documentation as seriously as the health check itself.