Bovine Tuberculosis Testing Requirements in Nebraska: What Cattle Producers Need to Know

Cattle producers moving animals across Nebraska’s borders often assume a health certificate and a quick visual check are enough to satisfy state requirements. That assumption can be costly. Bovine tuberculosis testing requirements in Nebraska are tied directly to the state’s federal disease classification, and the specific rules that apply depend on the animal’s age, sex, origin, and intended use.

This guide walks through how Nebraska regulates bovine TB, which animals require testing, which test methods are approved, and what happens if a herd turns up a suspect or positive result. Whether you’re importing breeding stock, exhibiting cattle at a county fair, or managing a resident herd, understanding these rules protects both your operation and Nebraska’s broader disease-control standing.

What Is Bovine Tuberculosis and Why It Is Regulated in Nebraska

Mycobacterium bovis is the bacterium responsible for bovine tuberculosis, and it is capable of infecting far more than cattle. The Nebraska Department of Agriculture notes that bovine tuberculosis is a chronic, bacterial disease of cattle which can also affect many other species of mammals such as sheep, goats, horses, pigs, deer, dogs, and cats. Because bovine tuberculosis can be spread to humans and can pose a serious health threat to humans, state and federal agencies treat it as a regulatory priority rather than a routine herd-health issue.

Infected animals present a real transmission risk to the rest of a herd. Infected animals shed bacteria in respiratory secretions, feces, milk, and other less common routes of bodily fluids, and cattle generally become infected through the respiratory or ingestion routes. The federal government’s response to this risk is not new — the U.S. Bureau of Animal Industry began the National Tuberculosis Eradication Program in 1917 due to human and livestock concerns regarding bovine tuberculosis, and that program still forms the backbone of Nebraska’s testing rules today.

Bovine TB is not the only tuberculosis-related disease that Nebraska livestock and poultry owners should know about. If you keep backyard flocks alongside cattle, it’s worth reviewing how avian tuberculosis differs from the bovine strain, since the two diseases involve different pathogens, hosts, and control measures. Cat owners in the state should also be aware that zoonotic-disease control extends beyond cattle — see Nebraska’s rabies vaccine requirements for cats for a comparison of how the state manages a different zoonotic threat.

Pro Tip: Bovine TB is one of several reportable cattle diseases that intersect with Nebraska’s broader animal health rules. Reviewing general bovine disease management practices alongside TB-specific testing rules helps you catch overlapping compliance obligations before they become problems.

Nebraska’s TB Classification Status and Risk Zones

Every state’s TB testing burden is tied to its federal classification under 9 CFR Part 77. As of the current federal listing, Nebraska is among the modified accredited States, a tier that sits below accredited-free status and carries additional testing obligations for many classes of imported cattle. This classification matters because it determines whether Nebraska cattle face extra scrutiny when crossing into other states, and whether cattle entering Nebraska from lower-status regions must be tested before arrival.

The federal classification system defines several tiers. An accredited-free State or zone is one that has the authority to enforce and complies with the Uniform Methods and Rules and has had no findings of tuberculosis in any cattle or bison herds in the State or zone for the previous 5 years. Modified accredited status, by contrast, permits a small number of affected herds within a defined period before a downgrade is triggered. Producers can review current classifications directly through the eCFR Title 9 Part 77 tuberculosis regulations.

Nebraska’s history with bovine TB outbreaks illustrates why this classification carries real financial weight. Research published in a peer-reviewed cost analysis found that the financial toll on Nebraska of two outbreaks in 2009 was substantial; the governor appropriated $750,000 to the Department of Agriculture to cover employee overtime, outside help, and purchase of animal restraint equipment necessary for the traceback effort. That single episode shows how quickly a herd detection can escalate into a statewide resource commitment, which is part of why Nebraska maintains strict import and testing rules even for cattle coming from other modified accredited states.

Classification Tier	General Requirement	Testing Frequency for Accreditation
Accredited-Free	No TB findings in cattle/bison herds for 5 years	Cattle 24 months and older tested for reaccreditation
Modified Accredited Advanced	Limited recent affected herds; higher scrutiny than free status	Cattle 18 months and older
Modified Accredited (Nebraska’s tier)	Additional import/export testing conditions apply	Cattle 12 months and older
Accreditation Preparatory	Working toward accredited status; most intensive testing	All cattle and bison regardless of age

Who Must Test and Which Animals Are Covered in Nebraska

Nebraska’s TB rules apply to what federal regulation calls “bovines” — a category that includes both cattle and bison (Bos taurus, Bos indicus and Bison bison). That said, the practical testing burden falls disproportionately on specific classes of animals rather than an entire herd on every occasion.

Sexually intact dairy and dairy-cross cattle face the strictest scrutiny under state rule. Nebraska Administrative Code specifies that all sexually intact dairy and dairy cross cattle need a permit prior to entry into Nebraska, and if two months of age or older, the cattle must originate from an accredited herd, with the accredited herd number recorded on the CVI, or be tested and found negative on an official tuberculosis test after reaching two months of age and within sixty days prior to entry. Younger calves aren’t exempt either — if less than two months of age, the cattle must originate from an accredited herd or be quarantined to their Nebraska destination, and test negative to an official tuberculosis test within sixty days after reaching two months of age, or be neutered within sixty days after reaching two months of age.

Coverage extends beyond traditional beef and dairy cattle. Camelids and other bovids are also swept into the testing net: camelids and bovids over six months of age are required to be tested and negative for brucellosis and tuberculosis within sixty days prior to entry into the state, though a brucellosis test is not required for neutered camelids or bovids. Exotic species get separate treatment — elephants are required to be tested and negative for tuberculosis within one year prior to entry into the state, a reminder that Nebraska’s rules reach well past conventional livestock into exhibition and zoo animals as well.

Producers running mixed operations should treat TB testing as one layer of a broader herd-health strategy. Pairing it with the state’s livestock biosecurity requirements reduces the chance that a preventable exposure event turns into a costly testing and quarantine cycle.

Approved TB Testing Methods in Nebraska

The frontline screening tool for bovine TB is the caudal fold test, an intradermal tuberculin injection administered at the base of the tail. According to APHIS guidance, diagnosing TB in live animals depends on using an effective testing technique with an intradermal injection of tuberculin obtained through your State animal health official or APHIS-VS Area Offices. Only one type of product is authorized for this purpose: officials must use only bovine purified protein derivative tuberculin (PPD bovis) licensed by USDA for official testing.

Reading the test correctly requires more than a visual check. Test observation without palpation is unacceptable, and officials use VS Form 6-22 to record results. Results are entered in one of two ways: “S” for suspect is recorded when the examiner observes or palpates any increase in caudal fold thickness, size, or sensitivity, since a delayed hypersensitivity reaction manifests as swelling and induration at the injection site if the animal has been exposed to TB antigens.

A caudal fold response is only a starting point, not a diagnosis. Per APHIS’s national reference guide, 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. Nebraska’s regulatory veterinarians follow this same layered approach, reserving definitive action for confirmatory results rather than a single screening response.

• Caudal Fold Test (CFT): Primary screening test; intradermal tuberculin injection at the tail base; read 48-72 hours after administration.
• Comparative Cervical Test (CCT): Confirmatory test used on suspect animals; compares reaction to bovine and avian tuberculin injected in the neck.
• Gamma Interferon Assay: Blood-based confirmatory test; can supplement or substitute for CCT in certain herd investigations.
• Postmortem/Slaughter Surveillance: Ongoing national detection method that catches many cases missed by live-animal screening.

Pro Tip: Because medications, vaccines, and anthelmintic drugs can suppress the immune response the tuberculin test relies on, schedule TB testing before — not during or after — other herd health treatments to avoid a false negative.

Interstate and Intrastate Movement Testing Requirements in Nebraska

Movement testing is where most producers encounter Nebraska’s TB rules in practice. Nebraska Administrative Code Title 23, Chapter 21 states plainly that in addition to general requirements, cattle or cervidae brought into the state are required to comply with federal tuberculosis provisions and these regulations. That means both the federal classification of the origin state and Nebraska’s own supplemental rules apply simultaneously.

Cattle from lower-status states face heightened conditions. When a neighboring state’s classification changes, Nebraska adjusts its import rules accordingly — as documented when regulations require all cattle imported into Nebraska from states certified with a Modified Accredited status to meet one of two criteria: originate from an accredited herd and obtain a permit for entry, listing the accreditation number on the Certificate of Veterinary Inspection and being individually identified, and tested negative to an official tuberculin test within 60 days prior to entry; or originate from a herd tested negative to an official whole-herd tuberculin test within 365 days prior to entry, according to a University of Nebraska-Lincoln CropWatch bulletin covering a similar Minnesota reclassification event.

Cattle with origins outside the U.S. face their own timelines. Nebraska code specifies that cattle originating in Mexico need to have been tested for tuberculosis and found negative within sixty days prior to entry into Nebraska, and such cattle will remain at the Nebraska destination under quarantine until subjected to a second official tuberculin test conducted at least sixty days after the importation test but not more than one hundred twenty days after entry. Rodeo cattle carry an added layer too: all rodeo cattle imported into Nebraska are required to have a permit prior to entry in addition to tuberculosis testing meeting the Department’s guidelines.

Exhibition cattle get partial relief from routine testing, but not a blanket exemption. Under the state’s most recent fair health requirements, general classes state that tuberculosis testing is not required to exhibit, provided the animal is from a herd not under quarantine. However, an important carve-out remains for one origin state: tuberculosis testing is required for cattle exhibited at the fair except from Michigan, and separately, all sexually intact dairy cattle two months of age or older must meet specific TB testing conditions before exhibition. You can review the complete current-year requirements in the Nebraska Department of Agriculture’s exhibition health requirements document.

Movement Scenario	Testing Requirement
Dairy/dairy-cross cattle, 2+ months old	Accredited herd origin OR negative test within 60 days prior to entry
Cattle from a Modified Accredited-status state	Accredited herd + permit, or negative whole-herd test within 365 days plus individual test
Cattle originating in Mexico	Negative test within 60 days prior to entry, then quarantine and retest 60-120 days after arrival
Rodeo cattle	Entry permit plus TB testing per NDA guidelines
Exhibition cattle (general)	No test required if herd is not under quarantine; Michigan-origin cattle excepted

For the full regulatory text governing these import categories, see the Nebraska Administrative Code, Title 23, Chapter 21, Section 004 on animal importation.

What Happens When a Suspect or Positive Result Occurs in Nebraska

A suspect caudal fold response triggers an immediate reporting chain, not a wait-and-see approach. APHIS guidance directs that if the test produces any type of response, the examiner must immediately notify the APHIS-VS Area Office and State animal health officials. Nebraska’s own disease page reinforces the same urgency at the producer level: if you suspect TB in your herd, you should isolate the affected animal immediately and contact the Nebraska Department of Agriculture by calling 402-471-2351.

From there, the case moves into confirmatory testing rather than immediate condemnation. National surveillance data shows that live animal testing is performed with a screening test, and if positive, the regulatory veterinarian will conduct a confirmatory test. Suspect animals aren’t automatically classified as infected — federal rules define a suspect as any captive cervid that is not negative to an official tuberculosis test and that is not classified as a reactor by the testing veterinarian, a distinction that carries into cattle investigations as well.

It’s worth noting that most detections in the national program don’t originate from live-animal testing at all. According to APHIS, the primary source of tuberculosis surveillance is carcass inspection at all Federal and State inspected slaughter establishments, with the other main sources of tuberculosis detection being testing animals before interstate movement and during disease investigations. That means a herd’s TB status can surface well after an animal has left the property, which is part of why traceability records matter as much as the test itself.

Important Note: Bovine tuberculosis is not treated in livestock once confirmed. Federal policy directs affected and exposed animals toward removal or depopulation rather than clinical treatment, so early detection through routine testing remains the only real cost-control tool available to producers.

Quarantine and Herd Depopulation Rules in Nebraska

Once a herd is confirmed affected, quarantine becomes mandatory until a defined testing pathway is completed. Federal Uniform Methods and Rules specify that herds in which M. bovis infection has been confirmed shall remain under quarantine, if not depopulated, until all requirements of an individual herd plan have been completed. That plan is not a quick process — it typically involves at least two consecutive tests of the herd in which all responders to a primary diagnostic test have been examined postmortem with no evidence of infection, followed by six consecutive tests in which all responders have been classified negative to a supplemental test, with testing intervals requiring at least 60 days between the first four herd tests and at least 180 days between later tests.

Depopulation, while drastic, is often the federally preferred route because of how unreliable partial removal has proven historically. Federal Register documentation of the indemnity program notes that up to 33 percent of herds that were released from quarantine through the test-and-removal method between 1985 and 1994 were found to still be affected with tuberculosis by the fifth annual quarantine release test. For that reason, current guidance states that exposed animals previously sold from a known-affected herd shall be depopulated with indemnity if at all possible.

Restocking a depopulated premises comes with its own testing schedule. Rules require that 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. Feedlots face a parallel process: cattle and bison in feedlots known to be exposed to tuberculosis shall be quarantined and shipped under permit directly to slaughter, and feedlots that have contained infected or exposed animals shall be vacated, cleaned, and disinfected before restocking.

Producers rebuilding a herd after a TB event should revisit their overall biosecurity plan as part of the restocking process, since the same exposure pathways that led to the original detection can just as easily reinfect a newly assembled herd. Full technical detail on herd testing protocols is available in the federal Bovine Tuberculosis Eradication Uniform Methods and Rules.

Penalties for Non-Compliance in Nebraska

Nebraska’s animal health enforcement authority extends across inspection, quarantine, and reporting obligations, and non-compliance carries consequences beyond a simple citation. Federal program standards make clear that state and tribal animal health officials retain broad authority to quarantine animals, herds of animals, and geographic areas, and to require animal owners to present their animals for program purposes. Nebraska’s own Department of Agriculture exercises this authority in coordination with USDA APHIS whenever a suspected violation or active investigation arises.

The practical consequences of skipping required testing or violating a quarantine order typically fall into several categories:

• Movement restrictions: Cattle lacking required test results or permits can be held, quarantined, or denied entry at the point of inspection.
• Indemnity ineligibility: Producers found to have violated testing, movement, or reporting rules generally forfeit eligibility for state or federal indemnity if animals are later destroyed as part of an eradication action.
• Herd-level quarantine escalation: Moving an animal out of an affected or quarantined herd without written authorization from the State Veterinarian can extend quarantine timelines for the entire herd, not just the animal involved.
• Market access consequences: Repeated or serious violations can affect a producer’s or dealer’s ability to move cattle interstate, since receiving states routinely verify Nebraska-issued certificates against actual compliance records.

Important Note: Specific administrative penalties, fines, and license consequences for bovine TB violations are set and periodically updated through Nebraska Administrative Code Title 23 and related statutes. Producers facing a compliance question or investigation should contact the Nebraska Department of Agriculture directly at 402-471-2351 or consult a livestock attorney, since enforcement details can change and this article is not a substitute for official regulatory guidance.

The clearest way to avoid penalties altogether is to treat testing, permitting, and record-keeping as routine parts of herd management rather than paperwork to handle only when moving animals. Pairing consistent TB compliance with strong bovine disease awareness gives producers the best chance of catching problems before they trigger a quarantine, an indemnity denial, or a market access setback. For the underlying federal framework that shapes all of Nebraska’s state-level rules, the APHIS bovine tuberculosis program page remains the most current federal reference point.