Bovine Tuberculosis Testing Requirements in Virginia: A Cattle Owner’s Compliance Guide
August 14, 2026
If you raise cattle, bison, goats, or sheep in Virginia, a single skin test can decide whether your herd ships to market on schedule or sits under quarantine for months. Bovine tuberculosis testing requirements in Virginia are not paperwork for paperwork’s sake — they are the legal gateway that keeps the Commonwealth’s livestock able to cross state lines without federal restriction.
You’ll find these rules woven through Virginia’s administrative code, USDA federal regulations, and the day-to-day permit system that VDACS runs for anyone moving animals in or out of the state. This guide walks you through what triggers a test, which methods are approved, how movement permits work, and what happens if your herd turns up a reactor.
What Is Bovine Tuberculosis and Why It Is Regulated in Virginia
Bovine tuberculosis is a contagious, infectious, communicable disease of animals and humans caused by Mycobacterium bovis, written scientifically as Mycobacterium bovis. The disease is a widespread zoonosis affecting nearly all species of vertebrates, spread by direct contact, inhalation of droplets expelled from infected lungs, and ingestion of contaminated feed or milk. It’s a cousin of avian tuberculosis, and if you’re curious how the two compare across species, the differences are worth a look at how avian tuberculosis affects poultry and wild birds.
The disease behaves quietly in cattle. Infected cattle are typically asymptomatic, and detection usually occurs during live animal skin testing or, more commonly, at slaughter through national slaughter surveillance. That’s precisely why testing rules exist before symptoms ever show up.
Virginia’s dedicated regulatory chapter, titled the Rules and Regulations Governing the Prevention, Control and Eradication of Bovine Tuberculosis in Virginia, gives the State Veterinarian authority to require testing, issue quarantines, and coordinate with federal partners. That authority matters because APHIS and State animal health agencies collaborate with U.S. livestock producers to administer the National Tuberculosis Eradication Program, which has nearly eradicated tuberculosis from the nation’s livestock population since its inception in 1917. Nationally, the disease is now rare — the estimated prevalence is 7 per 1 million cattle screened — but that low number is the direct result of ongoing testing, not a reason to skip it.
Pro Tip: Because bovine TB can spread through raw milk, Virginia’s dairy and manufacturing-milk regulations layer additional testing on top of the movement rules covered below. If you sell milk for manufacturing, review those requirements separately from your herd’s movement testing schedule.
Virginia’s TB Classification Status and Risk Zones
USDA APHIS doesn’t regulate every state the same way. States, or zones within states, are classified in five categories: Accredited Free, Modified Accredited Advanced, Modified Accredited, Accreditation Preparatory, and Non-Accredited. Each tier carries different testing burdens for cattle leaving the state, and the regulations define the Federal tuberculosis status levels for States or zones and contain testing and movement requirements for cattle and bison leaving States or zones of a particular status level.
| Classification | What It Generally Means for Herd Owners |
|---|---|
| Accredited Free | Zero recorded TB findings; cattle can generally move interstate without additional testing |
| Modified Accredited Advanced | Very low prevalence; some added surveillance and reporting obligations apply |
| Modified Accredited | Low but measurable prevalence; herd testing and movement permits are more frequent |
| Accreditation Preparatory | State is working toward a higher tier; all cattle and bison may require testing regardless of age |
| Non-Accredited | Highest restriction level; movement is tightly controlled pending disease control progress |
Virginia’s own administrative code ties the Commonwealth directly to this federal framework: tuberculosis-free accredited herds of cattle and tuberculosis-free areas in the Commonwealth of Virginia are governed by the regulations of the United States Department of Agriculture. In practice, that means your herd’s testing obligations shift automatically if USDA reclassifies Virginia or a neighboring state.
Because classification status is a moving target — a single confirmed case can trigger reclassification — you should always confirm the current tier before planning a shipment. APHIS’s status page tracks these designations, and it shows the status of states in these eradication programs in near real time.
Risk zones aren’t limited to cattle. Captive deer and elk herds are tracked under a separate federal classification track with different prevalence thresholds than cattle and bison, so a producer running both cattle and a deer operation may be managing two different compliance calendars at once. If wildlife TB risk factors into your land management decisions, it’s worth reviewing how hunting license requirements in Virginia intersect with deer population monitoring in your county.
Important Note: Classification levels for captive cervid herds (deer, elk) are tracked separately from cattle and bison under federal rules. Confirm your specific herd type’s current status directly with VDACS rather than assuming cattle-level status applies across species.
Who Must Test and Which Animals Are Covered in Virginia
Virginia’s TB rules cover more species than most producers expect. Under the state’s milk-for-manufacturing regulations, cow, goat, bison, and water buffalo herds supplying milk for manufacturing must be located in a Modified Accredited Tuberculosis Area or an Area Accredited Free of Bovine Tuberculosis and certified by USDA, or must have passed an annual tuberculosis test, while sheep flocks and other mammal groups supplying milk for manufacturing must have all animals individually tested and passed an annual tuberculosis test.
Outside the dairy context, testing obligations mostly attach to movement rather than routine on-farm checks. You’ll typically need to test or document TB-free status if you’re in one of these situations:
- Bringing cattle into Virginia from a state or region not recognized as TB-free by USDA
- Importing cattle that originated in or transited through a foreign country
- Consigning cattle for rodeo or other entertainment purposes (agricultural fairs and shows are excluded from this category)
- Bringing goats or sheep into Virginia from a region not considered TB-free
- Operating a herd that supplies milk for manufacturing purposes
Young animals get some relief. A goat or sheep six months of age or younger that accompanies its dam that has tested negative for tuberculosis is not subject to the entry testing requirement. That exemption reflects the low transmission risk in nursing offspring, not a blanket pass for all young stock.
If you’re also managing rabies compliance alongside TB testing, the two programs run on separate tracks with separate paperwork — see Virginia’s rabies vaccine requirements for how that parallel system works for other species on your property.
Approved TB Testing Methods in Virginia
Virginia recognizes a specific set of federally approved test methods, and only certain veterinarians can administer them. Under state code, official tuberculin tests may be applied by the intradermal (caudal fold), single cervical, and comparative cervical methods, and an official tuberculin test shall be applied by a veterinarian regularly employed by the Commonwealth of Virginia or federal government, a county, or municipality.
The caudal fold test (CFT) is the front-line screening tool. If an animal is exposed to the antigens present in bovine TB, a tuberculin injection results in a delayed hypersensitivity reaction manifested by swelling and induration at the injection site, with a positive response usually beginning within 8 to 12 hours and peaking about 72 hours after injection. Any response at all triggers the next step: immediate notification of your APHIS-VS Area Office and state animal health officials.
| Test Method | Role in the Program | Who Can Administer It |
|---|---|---|
| Caudal Fold Test (CFT) | Presumptive screening test | Accredited veterinarians |
| Comparative Cervical (CC) Test | Confirmatory test for suspects | Trained federal or state regulatory veterinarians only |
| Gamma Interferon Assay | Supplemental confirmatory test in cattle | Approved only with Chief State Animal Health Official sign-off |
| PCR, Histopathology, Bacteriology | Supplemental diagnostic procedures on tissue samples | Diagnostic laboratory personnel |
Follow-up testing runs on a strict clock. 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 — before a follow-up CCT can be applied. That’s not a suggestion; regulatory veterinarians enforce this window because early or late retesting distorts the result. For the complete federal reference on tuberculin response rates and interpretation standards, APHIS maintains the NVAP Reference Guide on tuberculosis control and eradication.
Interstate and Intrastate Movement Testing Requirements in Virginia
Movement testing is where most producers actually interact with Virginia’s TB program. If you’re bringing cattle into the state, cattle originating from a region not considered free of tuberculosis for cattle by USDA require a permit and a negative caudal fold or comparative cervical tuberculin test within 60 days prior to entry into Virginia. That requirement doesn’t apply universally, though.
Several exemptions can eliminate the need for pre-entry testing:
- Cattle consigned directly from a USDA-accredited tuberculosis-free herd, provided the accreditation number and date of the last herd test appear on the Certificate of Veterinary Inspection
- Cattle consigned directly to a slaughter establishment
- Cattle originating from a state USDA recognizes as TB-free, which VDACS confirms requires no testing or vaccination on entry
Some categories of cattle can’t use these exemptions, no matter the source. All cattle that originated in or transited through a foreign country, or are intended for rodeo or other entertainment purposes, require a negative caudal fold or comparative cervical tuberculin test within 60 days prior to entry, unless consigned directly from a USDA-accredited tuberculosis-free herd with the accreditation number and test date listed on the Certificate of Veterinary Inspection. Notably, display of cattle at a scheduled agricultural fair, show, or sale does not count as an entertainment purpose, so exhibitors get a break that rodeo stock does not.
Goats and sheep face a parallel rule: a goat or sheep originating from a region not considered free of tuberculosis for cattle by USDA is subject to a tuberculosis test and must show negative results within 60 days prior to entry into Virginia, unless consigned directly to a slaughter establishment.
Every animal covered by these rules needs to be identifiable and documented. VDACS confirms that all cattle, except non-dairy type cattle 18 months of age or younger, must bear official identification noted on the Certificate of Veterinary Inspection, with an entry permit number required unless using an approved electronic CVI obtained through Virginia’s online animal entry permit system. If you’re hauling animals across the state line yourself, pairing your entry permit with proper trailer setup matters just as much as the paperwork — see livestock trailer requirements in Virginia for what inspectors expect at weigh stations and checkpoints.
Intrastate movement carries its own reporting duty. A report must be submitted within 10 days to the State Veterinarian by any person making a tuberculin test of cattle in Virginia, and all cattle satisfactorily passing an approved test within the Commonwealth are identified by an official state pass tag, unless they already carry an official tag from another state or another permanent identification method recognized by the State Veterinarian. Movement permits are tracked per shipment: separate permits are required for each animal, except when animals are moved in one drove, truckload, or carload, in which case one permit suffices for the entire group.
What Happens When a Suspect or Positive Result Occurs in Virginia
A “suspect” classification isn’t a diagnosis — it’s a trigger for more testing. Animals classified as suspects for tuberculosis must be evaluated further by the comparative cervical test, gamma interferon test, or sent directly to slaughter under permit, and only Federal or State regulatory veterinarians who have had specialized training may conduct that follow-up testing. Your regular accredited veterinarian cannot self-confirm a suspect result.
Here’s the general sequence once a caudal fold test produces any reaction:
- The testing veterinarian notes any swelling or induration and classifies the response
- Any response at all requires immediate notification of your APHIS-VS Area Office and state animal health officials
- A trained regulatory veterinarian schedules the comparative cervical test, gamma interferon assay, or arranges direct movement to slaughter under permit
- Until the animal’s status is resolved, it stays on the premises where it was tested
Movement restrictions apply broadly during this window. Federal rules specify that no cattle or bison responding to an official tuberculosis test are eligible for interstate movement unless subsequently classified negative for M. bovis based on an official comparative cervical test or gamma interferon assay, and this prohibition extends to negative cattle or bison in herds containing suspects, except for slaughter, until the tuberculosis status of all suspects has been determined.
Virginia adds its own identification protocol for confirmed reactors. Cattle reacting to the tuberculin test, or found by clinical examination to be infected, are effectively branded with the letter “T” not less than two inches high on the left jaw, tagged with a metal tag bearing the inscription “Virginia Reactor” and a serial number in the left ear, and reported within 10 days to the State Veterinarian. Until that process is complete, reactors must be segregated from all other cattle on the premises, and no reactor may be removed from the boundaries where confined without a permit from the State Veterinarian.
Quarantine and Herd Depopulation Rules in Virginia
Once a herd is confirmed affected, Virginia gives you two paths forward, and the State Veterinarian has the final say on which one applies. Tuberculosis-infected herds may be depopulated when approved by the State Veterinarian, or the owner may follow a test-and-slaughter program as prescribed in the Uniform Methods and Rules for Bovine Tuberculosis Eradication published by USDA APHIS.
Reactor animals don’t simply disappear from the farm on their own schedule. Permits for movement may be issued only for moving animals from quarantined premises to slaughterhouses operating under official state or federal meat inspection, and all cattle that reacted to the tuberculin test, or were found infected by clinical examination, must be slaughtered under official state or federal meat inspection, with postmortem findings reported within 10 days to the State Veterinarian.
Key Insight: Depopulation isn’t just about removing sick animals — it resets your herd’s accreditation clock. Under federal rules, freedom from tuberculosis must be demonstrated for a set period before a depopulated herd can regain accredited status.
That reset period varies by history. The requirement of freedom from tuberculosis in herds is 2 years from the depopulation of the last affected herd in states or zones that were previously accredited free and depopulated all affected herds, and 3 years in other states or zones that have depopulated all affected herds. If your herd is the source of the outbreak, the ripple effect goes beyond your fence line: all livestock herds within a 10-mile radius will be tested within 6 months of any diagnosis of bovine tuberculosis, meaning neighboring producers can find themselves pulled into the investigation regardless of their own herd’s status.
Penalties for Non-Compliance in Virginia
Virginia’s TB program relies on mandatory reporting and permit-based movement, and both carry consequences when skipped. Testing veterinarians who fail to submit results are already out of compliance the moment the 10-day reporting window closes, since a report must be submitted within 10 days to the State Veterinarian by any person making a tuberculin test of cattle in Virginia. Producers who move reactor animals, or animals awaiting evaluation, off quarantined premises without authorization are acting outside the permit system entirely, since no reactor may be removed from the boundaries where confined without a permit from the State Veterinarian.
The federal backbone behind these state rules gives USDA broad enforcement reach. The Animal Health Protection Act, cited in federal rulemaking on state TB classifications, provides the statutory authority under 7 U.S.C. 8301-8317 for restricting interstate movement of diseased or exposed livestock. In practice, violations of Virginia’s testing, permit, or quarantine rules can result in extended quarantine, mandatory slaughter of affected animals, loss of accredited-herd status, and civil or criminal liability under Virginia’s animal health statutes.
Common Mistake: Assuming a Certificate of Veterinary Inspection alone satisfies TB entry requirements. A CVI documents the animal’s health status, but it doesn’t replace the negative tuberculin test or accredited-herd documentation required for cattle originating from a non-TB-free region.
Because enforcement details can vary based on herd history and current classification status, contact VDACS’s Office of Veterinary Services directly before assuming your situation qualifies for an exemption. The cost of a phone call is far lower than the cost of a quarantined herd.
Bovine tuberculosis testing requirements in Virginia ultimately come down to three habits: knowing your herd’s current classification, keeping permits and identification current before any movement, and reporting test results on time. Producers who build those habits into their regular herd management routine rarely run into the quarantine and depopulation scenarios described above — and that’s the entire point of the program.