Brucellosis Laws in Kansas: What Cattle and Bison Owners Need to Know

Brucellosis is one of the most closely watched livestock diseases in the United States, and Kansas takes its regulatory obligations seriously. Whether you raise cattle, bison, or both, understanding how state and federal brucellosis rules apply to your operation can mean the difference between smooth commerce and a costly compliance violation.

This guide walks you through every layer of Kansas brucellosis law — from the state’s official disease-free classification to vaccination protocols, testing timelines, movement permits, quarantine authority, and the penalties you face if you run afoul of the rules.

What Is Brucellosis and Why It Is Regulated in Kansas

Brucellosis — also known as contagious abortion or Bang’s disease — is a costly disease of livestock and wildlife caused by bacteria in the genus Brucella. It carries significant consequences for animal health, public health, and international trade. For Kansas livestock producers, those consequences translate directly into economic losses: aborted calves, reduced breeding efficiency, and barriers to interstate commerce.

Brucellosis occurs mainly in cattle, bison, and swine, but can also affect other animals including cervids, goats, sheep, and horses, as well as people. In cattle and bison, the bacteria of concern is Brucella abortus. Because the disease is zoonotic — meaning it can pass from animals to humans — public health agencies treat any outbreak as a dual threat to both herds and people.

Infected animals may appear healthy, even during pregnancy. However, they can still harbor and spread infectious bacteria and serve as dangerous sources of infection. This hidden transmission risk is precisely why Kansas law mandates testing, documentation, and movement controls rather than relying on visual inspection alone.

Annual losses from lowered milk production, aborted calves and pigs, and reduced breeding efficiency decreased from more than $400 million in 1952 to less than $1 million today — a success story built on decades of cooperative state-federal eradication work that Kansas has been a part of since the mid-twentieth century. Maintaining that progress requires ongoing vigilance from every producer in the state.

Kansas’s Brucellosis Classification Status

The federal government amended its brucellosis regulations to change the classification of Kansas from Class A to Class Free after determining that Kansas meets the standards for Class Free status. That interim rule was effective July 1, 1999. Kansas has maintained that standing ever since.

Under 9 CFR § 78.43, Kansas is listed among the validated brucellosis-free states, alongside nearly every other state in the nation. All 50 states, Puerto Rico, and the U.S. Virgin Islands are brucellosis-free, except for the occasional spillover of cases occurring in livestock near the Greater Yellowstone Area due to bison and elk having the disease.

States are designated brucellosis-free when they have no infected cattle or bison for 12 consecutive months under an active surveillance program, or when additional surveillance measures are in place around areas that have brucellosis-infected wildlife to ensure early detection of any disease spillover.

The federal classifications are Class Free, Class A, Class B, and Class C. States or areas that do not meet the minimum standards for Class C status are required to be placed under federal quarantine. Restrictions on moving cattle and bison interstate become less stringent as a state or area approaches or achieves Class Free status. Kansas’s Class Free designation therefore benefits producers directly by reducing the documentation burden when moving animals across state lines.

For comparison, you can review how neighboring states handle their own classification requirements in our guides to brucellosis laws in Nebraska and brucellosis laws in Missouri.

Vaccination Requirements in Kansas

There is a vaccine for brucellosis called RB51. Licensed for use in nonpregnant female cattle 4 to 12 months of age, the vaccine provides a significant level of protection — about 70 to 80 percent effective. It is also very effective at preventing abortions, which prevents further disease transmission.

RB51 is available only through an accredited veterinarian, state animal health official, or federal area veterinarian in charge. You cannot purchase or administer the vaccine on your own — it must be obtained and applied through a licensed professional who can also provide the official documentation your herd records will require.

In Kansas, calfhood vaccination is voluntary rather than mandatory for resident herds. The Kansas Department of Agriculture (KDA) regulates the cost of official calfhood vaccination tags, which provide a voluntary method for cattle producers to indicate that a heifer has been vaccinated for brucellosis by an accredited veterinarian. Accredited veterinarians purchase official calfhood vaccination tags from KDA and sell them to producers who wish to utilize them.

KDA’s ability to offer official calfhood vaccination tags is beneficial because the tags provide a cost-effective means for Kansas producers to assure that their cattle have been vaccinated against an infectious disease that has the potential to damage the beef industry, promoting security and confidence in the industry at a reasonable price to producers.

An “official calfhood vaccinate” refers to female cattle or female bison vaccinated while from 4 through 12 months of age by an APHIS representative, state representative, or accredited veterinarian with a reduced dose approved brucella vaccine, and permanently identified by a tattoo and by an official vaccination eartag in the right ear.

Some states do not allow cattle or domestic bison to be moved interstate for breeding without a record of brucellosis vaccination. If you plan to sell breeding stock across state lines, confirming the destination state’s vaccination documentation requirements before movement is strongly advisable. See our guide on brucellosis laws in Michigan for an example of how another state structures its own vaccination framework.

Testing Requirements for Cattle and Bison in Kansas

Because Kansas holds Class Free status, routine mandatory brucellosis testing of resident cattle herds is not required under normal circumstances. However, specific transactions and movement scenarios trigger testing obligations that every producer should understand.

It is unlawful for any person to sell any cattle as brucellosis tested, or as Bang’s tested, or as clean, or as free from brucellosis, or any equivalent, unless such animals have been tested and found negative to brucellosis within a period of 30 days immediately preceding the sale — provided this does not apply to cattle sold from an accredited brucellosis-free herd.

The following table summarizes the key testing timelines that apply in Kansas:

Testing is the only sure way to detect brucellosis. There is no known cure for brucellosis in an infected animal. This is why the state’s testing framework focuses on identifying and removing infected animals before they can spread the disease through a herd or across state lines.

A certified brucellosis-free herd is a herd of cattle or bison whose owner has been issued a certified brucellosis-free herd certificate signed by the appropriate state animal health official and the Veterinarian in Charge. Certified brucellosis-free herd status remains in effect for one year beginning with the date of issuance of the certificate. Maintaining that certification requires annual retesting to keep the designation current.

Any animal determined to be a reactor animal to brucellosis must be sold for slaughter within 15 days after being properly identified. Such an animal being shipped for slaughter must be accompanied by an official shipping permit.

Interstate and Intrastate Movement Rules in Kansas

Movement rules in Kansas operate on a risk-based model: the testing and documentation burden is tied directly to where the animals are coming from, not simply to the fact that they are crossing a state line.

Brucellosis testing is not required unless cattle are entering Kansas originating from the Greater Yellowstone Designated Surveillance Area (DSA). If you are unsure of the status of the area of origin, you can view a list of states’ statuses and a map of counties affected in a given state.

For cattle originating from the DSA, Kansas imposes distinct requirements based on animal age and reproductive status:

• Cattle from the DSA under 12 months of age intended for feeding require an import permit. Individual official identification is required on all cattle originating from the DSA.
• Cattle from the DSA 12 months of age or older and sexually intact, all breeding animals, and exhibition animals require an import permit and must either originate and move directly from a herd that had a negative whole-herd test for brucellosis in the previous 12 months with the date of test listed on the CVI, or have tested negative in the previous 30 days with the date of the qualifying test listed on the CVI.
• No testing is required if cattle move directly to slaughter.

For import permits, you must use the online permitting system or call the Kansas Import Desk at 785-564-6616. Issued permits are valid for 15 days.

Bison movement carries its own set of rules. Free-ranging bison from the DSA are not permitted in Kansas. Domestic bison from the DSA that are 12 months of age or older and sexually intact, all breeding animals, and exhibition animals require an import permit and a CVI with official identification individually listed, along with a statement on the CVI that each animal being moved originates and moves directly from a USDA certified brucellosis-free herd in the state of origin.

For intrastate movement, the state animal health commissioner has authority to formulate and announce the rules under which approved tests for brucellosis in cattle shall be applied and for all proceedings subsequent to such application. This means the commissioner can issue updated movement guidance at any time conditions warrant.

For context on how neighboring states handle their own movement rules, see our articles on brucellosis laws in Minnesota and brucellosis laws in Nevada.

Reporting and Quarantine Requirements in Kansas

Kansas law gives the state animal health commissioner broad authority to respond to brucellosis threats through quarantine and mandatory reporting. Understanding these powers matters because a quarantine order can restrict your ability to move animals off your property with very little notice.

When the animal health commissioner determines that a quarantine and other regulations are necessary to prevent the spread among domestic animals of any contagious or infectious disease, the commissioner must notify the governor of that determination, and the governor shall issue a proclamation announcing the boundary of the quarantine and the orders and rules and regulations prescribed by the commissioner.

Such proclamation must be published in the Kansas Register, except that the commissioner, if the area affected by the quarantine is limited in extent, may dispense with the governor’s proclamation and give such notice as the commissioner deems sufficient to make the quarantine effective.

The commissioner must establish the quarantine immediately and give and enforce directions, rules, and regulations as to separating, isolating, handling and treating, feeding and caring for diseased animals, animals exposed to the disease, and animals within the quarantine that have not been immediately exposed, as the commissioner deems necessary to prevent those classes of animals from coming into contact with one another.

The animal health commissioner or the commissioner’s designee is authorized and empowered to enter any grounds and premises to carry out the provisions of this act. This means that if brucellosis is suspected or confirmed on your property, state officials have legal authority to conduct on-site inspections without requiring your invitation.

On the federal side, animal health professionals — including veterinarians, diagnostic laboratories, and public health, zoo, or wildlife personnel — are required to report diagnosed or suspected cases of nationally listed reportable animal diseases to APHIS Area Veterinarians in Charge and to the state animal health official as applicable under state reporting regulations.

You can review how Kansas’s quarantine framework compares to other states by checking our guides on brucellosis laws in Michigan and brucellosis laws in Nebraska.

Penalties for Brucellosis Violations in Kansas

Kansas does not treat brucellosis violations lightly. The state’s penalty framework covers both criminal and civil exposure, and the consequences scale with the severity and intent of the violation.

Criminal Penalties — Quarantine Violations

Any person who knowingly and intentionally violates, disregards, or evades, or attempts to violate, disregard, or evade any order establishing or regulating a quarantine issued pursuant to Article 6 of Chapter 47 of the Kansas Statutes Annotated, upon conviction, shall be guilty of a severity level 7 nonperson felony. A severity level 7 nonperson felony in Kansas carries the potential for significant prison time and fines under the state’s sentencing guidelines.

Civil Penalties — Unlawful Handling of Diseased Animals

In addition to any other penalty provided by law, any person who has in their possession any domestic animal affected with any contagious or infectious disease, knowing the animal to be so affected, may incur a civil penalty if the person keeps the animal where other domestic animals not affected with or previously exposed to the disease may be exposed to it; sells, ships, drives, trades, or gives away the diseased and infected animal except by sale, trade, or gift to a regularly licensed disposal plant; or moves or drives any domestic animal in violation of rules and regulations, directions, or orders establishing and regulating quarantine.

No civil penalty shall be imposed except upon the written order of the duly authorized agent of the commissioner to the person who committed the violation. That order must state the violation, the penalty to be imposed, and the right of the person to appeal to the commissioner. Any such person, within 20 days after notification, may make a written request to the commissioner for a hearing in accordance with the Kansas administrative procedure act.

Any person aggrieved by an order of the commissioner made under this section may appeal that order to the district court in the manner provided by the Kansas judicial review act.

Fraudulent Sale Violations

It is unlawful for any person to sell any cattle as brucellosis tested, as Bang’s tested, as clean, or as free from brucellosis, or any equivalent, unless such animals have been tested and found negative to brucellosis within 30 days immediately preceding the sale. Selling cattle under a false disease-free claim exposes you to both civil liability and potential fraud charges beyond the animal health statutes.

The following table summarizes the penalty tiers at a glance:

If you operate livestock operations in multiple states, understanding how penalties compare across jurisdictions is important. Our guides on brucellosis laws in Missouri and brucellosis laws in Minnesota cover similar penalty frameworks in neighboring states.

Kansas livestock producers with questions about other state animal laws may also find these resources useful: hunting laws in Kansas, backyard chicken laws in Kansas, roadkill laws in Kansas, and hedgehog ownership laws in Kansas.

Brucellosis compliance in Kansas ultimately comes down to three consistent habits: keeping your herd’s testing and vaccination records current, verifying the disease status of any animals you import, and responding immediately — and transparently — if a suspected infection arises. The legal framework is designed to protect your herd, your neighbors’ herds, and the broader livestock economy that Kansas depends on. Staying compliant is not just a legal obligation; it is a practical investment in the long-term health of your operation.