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This website publishes administrative rules on their effective dates, as designated by the adopting state agencies, colleges, and universities.

Chapter 901:1-5 | Brucellosis

 
 
 
Rule
Rule 901:1-5-01 | Definition of "brucellosis test".
 

(A) As used in regulations 901:1-5-01 through 901:1-5-09.

(1) "Brucellosis test" means one of the following approved tests conducted by an approved laboratory or by the laboratory operated by the department of agriculture:

(a) Standard tube agglutination test;

(b) Buffered acidified plate antigen test;

(c) Complement fixation test; or

(d) Fluorescent polarization assay.

(2) "Approved laboratory" means a laboratory that maintains current United States department of agriculture (USDA) animal and plant health inspection service (APHIS) approval for testing Brucella abortus. Approved laboratories are listed at https://www.aphis.usda.gov/labs/approved-testing-labs. The list is also available upon request from the national veterinary services laboratories (NVSL) if the link breaks due to USDA website changes.

(3) "Chief" means the chief of the division of animal health within the Ohio department of agriculture as described in section 941.02 of the Revised Code.

(B) The department may classify animals as positive based upon any one of the following test results:

Not Official Brucellosis VaccinateOfficial Brucellosis Vaccinate
Rivanol + 1/25+1/25
Complement fixation + 1/20 + 1/40

(C) The department shall classify any animal from which a Brucella sp. organism is isolated by bacteriological techniques as positive regardless of brucellosis test results or brucellosis vaccination status.

(D) The department may reclassify positive animals to suspect pending further tests and examination.

(E) Swine and herds of swine shall be classified as follows:

(1) "Positive" swine means:

(a) Any swine disclosing a complete agglutination reaction in the blood titer dilution of 1:100 or higher;

(b) Any swine in an infected herd or herd of unknown status having a complete reaction in the 1:25 dilution or higher; or

(c) Any swine disclosing a positive card test reaction.

(2) "Negative" swine means:

(a) Any swine from an infected herd or herd of unknown status that:

(i) Discloses no reaction or less than complete agglutination in the blood titer dilution of 1:25; or

(ii) Discloses a negative card test reaction;

(b) Any swine from a validated or negative herd that:

(i) Discloses no reaction or less than complete agglutination in the blood titer dilution of 1:100; or

(ii) Discloses a negative card test reaction.

(3) "Suspect" swine means any swine not classed as positive or negative to a brucellosis test.

(4) "Infected herd" means any herd in which one or more swine show:

(a) A complete agglutination reaction in the blood titer dilution of 1:100 or higher; or

(b) A positive reaction to the card test.

(5) "Negative herd" means any herd in which no swine:

(a) Have agglutination reactions higher than incomplete at the 1:100 dilution; or

(b) Are found positive to the card test.

(F) Swine classed as positive or suspect shall be officially identified as approved by the department.

(G) No person shall move swine classified as positive,suspect, or exposed to brucellosis, without prior written permission from the department.

Last updated July 17, 2026 at 12:38 AM

Supplemental Information

Authorized By: 941.03
Amplifies: 941.21
Five Year Review Date: 7/17/2031
Prior Effective Dates: 8/9/1968
Rule 901:1-5-02 | Definition of "official brucellosis vaccinate".
 

(A) "Official brucellosis calfhood vaccinate" means a female bovine or bison animal:

(1) To which an approved brucella biologic was administered by a licensed accredited veterinarian, an employee of the division of animal health at the Ohio department of agriculture, or an employee of the United States department of agriculture veterinary services representative, in accordance with the manufacturers' recommendations when the animal was:

(a) Not less than one hundred twenty days of age nor more than one hundred eighty days of age for dairy breeds; or

(b) Not less than one hundred twenty days nor more than two hundred forty days for beef breeds; or

(2) Which is listed as an official brucellosis calfhood vaccinate in the state or country of origin.

(3) Which does not meet the age requirements of paragraph (A)(1)(a) or (A)(1)(b) of this rule but is intended for interstate movement and meets the age requirement of the receiving state for official brucellosis calfhood vaccinates provided:

(a) The chief has approved the vaccination; and

(b) The vaccination was done by a person meeting the requirements of paragraph (A)(1) of this rule; and

(c) The animal is moved to the receiving state within seven days of the date of vaccination.

Any animals vaccinated in accordance with the provisions of this paragraph that are not shipped to the receiving state within seven days of the date of vaccination shall not be used for any purpose other than finish feeding to slaughter.

(B) Any licensed accredited veterinarian who administers an approved brucella biologic to any animal within the state of Ohio shall:

(1) Identify each animal with an individual official identification in the right ear consisting of an official eartag, or an existing official eartag; and

(2) Mark the right ear with a vaccination tattoo code consisting of three sections. The first section shall be an "R" designating the use of the RB51 brucella vaccine. The second section shall be the letter "V," enclosed in a shield, and the third shall be the last digit of the year in which the biologic is administered.

(C) Upon request the chief may grant written permission to vaccinate animals not eligible for vaccination under paragraph (A)(1) or (A)(3) of this rule.

(D) No person shall administer, or permit the administration of, an approved brucella biologic to:

(1) A male bovine or bison animal; or

(2) Any female bovine or bison animal except as stipulated in paragraphs (A) and (C) of this rule.

Last updated July 17, 2026 at 12:38 AM

Supplemental Information

Authorized By: 941.03
Amplifies: 941.21, 941.22, 941.24
Five Year Review Date: 7/17/2031
Prior Effective Dates: 10/3/1989 (Emer.), 12/31/1989
Rule 901:1-5-03 | Brucellosis herd test.
 

(A) A brucellosis herd test of cattle includes a test of each bovine animal six months of age or older except steers, spayed heifers and official brucellosis vaccinates under twenty-four months of age. A brucellosis herd test of cattle shall include a test of each official brucellosis vaccinate over twenty months of age.

(B) A brucellosis herd test of swine includes a test of each breeding swine six months of age and older.

(C) Any veterinarian who submits samples for a brucellosis test, shall include in the report required by division (C) of section 941.24 of the Revised Code:

(1) The name and address of the owner;

(2) Date of test or sample collection; and

(3) Official identification, age, sex, and breed of each individual animal tested or sampled.

Last updated July 17, 2026 at 12:38 AM

Supplemental Information

Authorized By: 941.03
Amplifies: 941.24
Five Year Review Date: 7/17/2031
Prior Effective Dates: 8/9/1968
Rule 901:1-5-04 | Quarantining for brucellosis.
 

(A) The chief shall place under quarantine any premises on which brucellosis is suspected or known to exist.

(B) The chief or the chief's designee may release any premises from quarantine upon evidence of a complete negative herd test made not less than sixty days following the removal of all reactor animals.

Last updated July 17, 2026 at 12:38 AM

Supplemental Information

Authorized By: 941.03
Amplifies: 941.26
Five Year Review Date: 7/17/2031
Prior Effective Dates: 8/9/1968
Rule 901:1-5-06 | Designating herd to be certified brucellosis free.
 

(A) The division of animal health may designate a herd of cattle to be certified brucellosis free if:

(1) The herd passed at least two consecutive negative herd blood tests which were not less than twelve months nor more than eighteen months apart; and

(2) All herd blood tests were conducted at an approved laboratory or a laboratory operated by the department.

(B) The division of animal health may recertify a herd as brucellosis free for three hundred sixty-five days if:

(1) It passes a negative herd blood test prior to the end of four hundred twenty-five days after the date of the certification or recertification test; and

(2) All herd blood tests were conducted at an approved laboratory or a laboratory operated by the department.

(C) If any blood test of an animal which is a member of a certified brucellosis free herd reveals:

(1) One positive animal, the division of animal health shall:

(a) Suspend the certified brucellosis free status of the herd; and

(b) Continue the suspension until the herd passes a negative whole herd blood test conducted at least sixty days following removal of the positive.

(2) More than one positive the division of animal health shall:

(a) Suspend the certified brucellosis free status of the herd; and

(b) Require that the herd comply with all requirements stated in paragraph (A) of this rule before the division of animal health may recertify the herd as brucellosis free.

(3) One or more suspects the division of animal health shall suspend the certified brucellosis free status of the herd. Prior to recertification of the herd, the following shall be required:

(a) Each suspect be classified as negative to a brucellosis test; or

(b) A complete negative whole herd blood test if any suspect is not available for retest, unless the suspect not available has been identified as an official brucellosis vaccinate.

(D) The department shall suspend the certified brucellosis free status of a herd if each addition to the herd is not:

(1) A natural herd addition; or

(2) From a herd with equal brucellosis free status; or

(3) An animal which tests negative for brucellosis:

(a) Thirty days prior to addition to the herd; and

(b) Not less than sixty days after addition to the herd; and

(c) Such tests were conducted at a laboratory approved by or operated by the department.

(E) The division of animal health shall not grant status as a member of the certified brucellosis free herd, for sale purposes, to any animal added to the herd under paragraph (D)(3) of this rule until the animal:

(1) Has tested negative for brucellosis within sixty to one hundred twenty days after being added to the herd; and

(2) Has been included in a complete herd retest.

(F) The department may conduct additional blood tests of any certified brucellosis free herd at any time which the department deems advisable.

Last updated July 17, 2026 at 12:38 AM

Supplemental Information

Authorized By: 941.03, 941.22
Amplifies: 941.22
Five Year Review Date: 7/17/2031
Prior Effective Dates: 8/9/1968
Rule 901:1-5-09 | Brucellosis tests.
 

(A) The division of animal health may validate or revalidate a herd of swine as Brucellosis-free on the basis of a negative herd test on all breeding animals six months of age and over in the herd. Validation shall be effective for three hundred sixty-five days and applies to all offspring of such herds.

(B) The division of animal health shall suspend the validation of a herd if each addition to the herd is not:

(1) A natural herd addition; or

(2) From a herd with equal validated status; or

(3) An animal for which evidence is available that it passed negative Brucellosis tests:

(a) Within thirty days prior to addition to the herd; and

(b) Not less than sixty days after addition to the herd; and

(c) Such tests were conducted at a laboratory approved by or operated by the department.

(C) If one or more reactors are found in a validated herd the department:

(1) Shall revoke the validation; and

(2) May revalidate the herd only after two consecutive negative tests of all breeding animals in the herd six months of age and over, conducted no less than ninety nor more than one hundred twenty days apart.

Last updated July 17, 2026 at 12:38 AM

Supplemental Information

Authorized By: 941.03, 941.22
Amplifies: 941.22
Five Year Review Date: 7/17/2031
Prior Effective Dates: 12/2/1972
Rule 901:1-5-12 | Brucella canis.
 

(A) Brucella canis tests.

(1) As used in this rule, a "brucella canis test" means one of the following:

(a) An indirect fluorescent antibody test (IFA test);

(b) A tube agglutination test (TAT test); or

(c) A brucella canis culture test.

(2) "Accredited laboratory" means a laboratory which maintains current accreditation through the international organization for standardization (ISO) or the American association of veterinary laboratory diagnosticians (AAVLD).

(3) The tests contained in paragraphs (A)(1)(a) to (A)(1)(c) of this rule may only be conducted by an accredited laboratory or the Ohio department of agriculture's diagnostic laboratory.

(4) Accredited laboratories or the Ohio department of agriculture's diagnostic laboratory may combine no more than five samples for IFA testing. If the composite sample is positive for brucella canis, each canine sample making up the composite sample must be tested individually.

(5) Any blood samples which are taken to conduct a brucella canis test shall only be taken by an accredited veterinarian or by a registered veterinary technician who is supervised by an accredited veterinarian.

(6) A validated testing methodology approved and administered by the Ohio department of agriculture's diagnostic laboratory.

(B) Brucella canis classifications.

(1) Suspect.

(a) A canine shall be classified as brucella canis suspect, if the canine tests positive for brucella canis using the following tests:

(i) An IFA test; or

(ii) A TAT test, at dilutions of 1:50 or 1:100.

(b) A canine which has been classified as brucella canis suspect according to paragraph (B)(1)(a)(i) or (B)(1)(a)(ii) of this rule, shall either:

(i) Be referred to the Ohio department of agriculture for confirmation of the canine's brucella canis status; or

(ii) Be humanely euthanized.

(2) Negative.

A canine shall be classified as brucella canis negative if, through tests conducted by the Ohio department of agriculture's diagnostic laboratory or an accredited laboratory, the canine tests negative for brucella canis using the following tests:

(a) An IFA test; or

(b) A TAT test.

(3) Positive.

A canine shall be classified as brucella canis positive if, through tests conducted by the Ohio department of agriculture or an accredited laboratory, the canine tests positive for brucella canis using the following tests:

(a) A TAT test, at dilutions 1:200; or

(b) A brucella canis culture test.

(4) Reclassification.

Brucella canis positive animals may be reclassified by the Ohio department of agriculture to brucella canis suspect pending the following:

(a) The animal's history;

(b) Clinical signs of the animal;

(c) Vaccination and treatment history;

(d) An epidemiological study of the animal;

(e) Examination; and

(f) Further testing at the discretion of the Ohio department of agriculture.

(C) Identification and reporting.

(1) All accredited veterinarians who conduct a brucella canis test, submit a sample for brucella canis testing, or employ any other method of detection for brucella canis, shall include in the report to the Ohio department of agriculture, the following information:

(a) Name, mailing address and residence address of the canine's owner;

The residence address of the animal if different from the canine's owner;

(b) Date of test or sample collection;

(c) Official identification as outlined in paragraph (C)(4) of this rule, sex, and breed of each individual animal tested or sampled; and

(d) The results of the test performed, if available.

(2) All accredited veterinarians who conduct brucella canis testing or submit samples for brucella canis testing at a laboratory other than the Ohio department of agriculture's diagnostic laboratory shall report the results of the tests to the Ohio department of agriculture within seven days. The report shall include all information contained in paragraphs (C)(1)(a) to (C)(1)(d) of this rule and be submitted electronically to the state veterinarian's office.

(3) All accredited veterinarians who draw blood for brucella canis testing shall submit the blood sample to an accredited laboratory within seven days.

(4) An accredited veterinarian must identify any canine to be tested for brucella canis with any of the following items which are approved by the Ohio department of agriculture:

(a) A microchip;

(b) A collar affixed around the dog's neck with a tag made of metal or aluminum that contains the following engraved, stamped, or imprinted information:

(i) The individual dog's number; and

(ii) The Ohio high volume breeder license number.

(D) Quarantine.

(1) Pursuant to Chapter 941. of the Revised Code, the Ohio department of agriculture shall quarantine any canine on any premises that has been exposed to or diagnosed as brucella canis suspect or brucella canis positive animal.

(2) A whole kennel test is defined as all test-eligible dogs located at a premises being tested within thirty days. Test-eligible dogs are dogs that are six months of age and older.

(3) A brucella canis positive, exposed, or suspect canine shall be released from quarantine upon:

(a) An epidemiological study conducted by the Ohio department of agriculture;

(b) The owner has been advised by the Ohio department of agriculture as to the zoonotic potential; and

(c) Two negative whole kennel IFA or TAT tests at least sixty days apart that were conducted by the Ohio department of agriculture or the national veterinary services laboratory; or

(d) The canine has been humanely euthanized or is otherwise deceased and documented by a licensed veterinarian or confirmed by the Ohio department of agriculture.

(4) Once a canine or a premises is under a quarantine order for brucella canis, all testing must be conducted by the Ohio department of agriculture's diagnostic laboratory or the national veterinary services laboratory in order for the quarantine order to be modified or lifted.

(E) Selling, movement, and disposal of animals.

(1) No canine known to be brucella canis exposed, suspect, or positive shall be offered for sale, trade, barter, or otherwise removed from the premises without prior written permission from the Ohio department of agriculture.

(2) Puppies born to a brucella canis suspect or positive dam shall not be offered for sale, trade, barter, or be removed from the premises unless the dam is later classified as brucella canis negative by the Ohio department of agriculture or the national veterinary services laboratory. These puppies may be isolated and quarantined in accordance with paragraph (D) of rule 901:1-5-12 of the Administrative Code and shall be tested after six months of age and must be re-tested no sooner than sixty days after the initial test in accordance with paragraphs (A)(1)(a) to (A)(1)(c) of this rule.

(3) Puppies under six-months of age which are classified as brucella canis suspect or positive may be re-tested after six-months of age and must be re-tested no sooner than sixty days after the initial test in accordance with paragraphs (A)(1)(a) to (A)(1)(c) of this rule.

Last updated April 1, 2025 at 7:48 AM

Supplemental Information

Authorized By: 941.02, 941.03, 941.22
Amplifies: 941.02
Five Year Review Date: 4/1/2030
Prior Effective Dates: 11/19/2018