Ringworm is a fungal infection affecting the skin, hair, and nails and is also known as dermatophytosis. Ringworm affects many mammalian species including cattle, sheep, goats, swine, horses, dogs, and cats. It is also zoonotic, meaning that humans can get infected from animals as well. It is highly infectious among animals and between animals and humans, so be sure to wear gloves and wash hands when handling an animal with a known or suspected ringworm infection. 

There are many species of fungus that cause dermatophytosis.  Most of these species of ringworm do NOT glow under Wood’s Lamp, so it is not an effective means of diagnosis. Fungal culture is the only test that can definitively diagnose dermatophytosis, but results can take as long as three weeks. However, ringworm has distinctive lesions that can indicate an infection to you and your veterinarian.  

Ringworm lesions are typically individual, circular areas of hair loss that may have scaling, crusting, and/or oozing along with redness or inflammation. Lesions are commonly found on the face, neck, chest, and limbs. These lesions may only become evident after shearing, so it is important to disinfect clippers between animals or use an entirely different set after clipping an infected animal.  

 While ringworm typically self-resolves, there are treatments that can aid the process and reduce spread since resolution may take 4 to 12 weeks. Supportive treatment of ringworm typically consists of topical therapy and adjustments in husbandry, as overcrowding can perpetuate infection among individuals.  Isolation of infected animals until resolution of lesions is ideal when possible. Please consult your veterinarian for use of topical therapies. Resolution is usually determined by new wool or hair growth in the lesion and supported by hair or wool around the edge of lesion not being easily removed when pulled.

As a reminder – animals that have active ringworm lesions should NOT be taken to the fair, especially given the zoonotic and contagious nature of the disease.

 To see how ringworm lesions may progress overtime, please see the infographic provided below.

Diamond C Livestock: https://www.facebook.com/photo/?fbid=572655578410153&set=a.472144501794595

Frequently Asked Questions:

Question 5) Are vaccines considered drugs? How does this impact drug testing?

Yes, vaccines are considered drugs. The federal Food, Drug, and Cosmetic Act (FD&Act) defines drugs as “articles intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease,” and vaccines meet this definition. Additionally, under the exhibition rules, “drug” means “any article…intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease in humans or animals or any article, other than food, intended to affect the structure or any function of the body of humans or animals…”

There is growing support to expand drug testing to other classes of livestock exhibition, such as junior livestock exhibition non-terminal shows. Beginning in 2025, the state program will offer testing for market meat goats, market dairy goats, and feeder calves (non-terminal) on a voluntary basis. If a fair or sponsor voluntarily wishes to have animals in these additional classes tested, the state will test in the same manner as other market classes. Regardless, all exhibition livestock must maintain the same status at the time of show, which is exhibition drug residue legal.

Dr. Dennis Summers, State Veterinarian and Animal Health Division Chief

Frequently Asked Questions:

Question 4) Can vaccines be given to animals before the show?

As stated above, all livestock must be exhibition drug residue legal at the time of show. This means that all vaccines, dewormers, and medications must meet their withdrawal period
by the day of show. Vaccines and preventive drugs should be part of managing disease during stressful commingling events with livestock, such as exhibitions. The rules do not prohibit the
use of vaccines as part of an effective disease prevention program designed by the official veterinarian, fair board, or your private veterinarian. But vaccines are drugs with a withdrawal time, and if those medications are given as preconditioning before coming to the fairgrounds, they must be given far enough in advance to take into the account the withdrawal period for those medications and drugs. In some circumstances, sponsors may have to adjust their prevention programs or policies in consultation with the official veterinarian to ensure that exhibitors maintain eligibility for the show.

Dr. Dennis Summers, State Veterinarian and Animal Health Division Chief

Frequently Asked Questions:

Question 3) Do feeder calves and lactating cattle have to meet the same drug residue or withdrawal times as market class animals?

Yes. All livestock shall be exhibition drug residue legal (EDRL) prior to the start of the show in which the livestock is entered into for exhibition. This means that drugs, including but
not limited to, pain killers, steroids, antibiotics, dewormers, and vaccines, must have met withdrawal times and tolerance by time of show to be eligible. This will require responsible use,
recordkeeping, and stewardship of drugs and quality assurance on behalf of the veterinarian and exhibitor. ODA expects exhibitors to maintain the highest ethical standards when
completing drug use notification forms to ensure that drugs and treatments are properly disclosed and to ensure exhibition livestock maintain EDRL status at time of show.

Dr. Dennis Summers, State Veterinarian and Animal Health Division Chief

Frequently Asked Question:

Question 2) What is Exhibition Drug Residue legal?

All livestock shall be exhibition drug residue legal (EDRL) prior to the start of the show in which the livestock is entered into for exhibition. This includes market, non-terminal, open, and breeding classes. This means that all exhibition livestock:

• must be slaughter eligible at time of show;
• have only been administered an approved drug, for which the withdrawal time has elapsed and met tolerance;
• have not been administered an unapproved drug;
• do not contain an unlawful substance.

Dr. Dennis Summers, State Veterinarian and Animal Health Division Chief

Frequently Asked Questions:

Question 1) What livestock are required to complete a Drug Use Notification Form (DUNF)

A drug use notification form is to be completed for the following livestock exhibited in a junior livestock show: market beef; market hog; market lamb; veal calf; market dairy cattle;
market goats; market poultry; lactating dairy animals; market rabbits; and feeder cattle.

Dr. Dennis Summers, State Veterinarian and Animal Health Division Chief

Ohio’s Livestock Exhibition Rules, Livestock Show Reform Act, and state Livestock Exhibition Program are nationally and internationally recognized for being some of the best in the country and the world. Ohio and all its livestock producers and exhibitors help to keep Ohio as a top state for exhibition regulations and superior quality exhibition livestock.

In this newsletter, we aim to provide key topics and discussions on the most important and current topics related to livestock exhibition rules. It is important that all sponsors, exhibitors, producers, and veterinarians understand these new rules and be familiar with the changes and expectations. Failure to read and understand these rules, or ignoring the requirements, may have a negative impact on an exhibitor and their family. The goal is to provide information in various formats so that everyone can exhibit and enjoy the rewards of their hard work while following the law.

The 2024 fair season was another great year, and we know that 2025 will be even better. Thanks for your support!

Dr. Dennis Summers, State Veterinarian and Animal Health Division Chief