Ringworm in Livestock

Ringworm is a common skin infection caused by various types of fungal species known as dermatophytes. Ringworm infections can occur in humans, domestic animals and livestock. While ringworm is not dangerous and generally goes away on its own, it is highly contagious.

  1. Cause

    • Ringworm is caused by fungus, or dermatophytes, entering broken skin compromised by an existing cut or sore. The fungus is most commonly passed on from contact with an infected animal or person, though it can be passed on from contact with a surface touched by an infected animal or person, or less frequently through bacteria in dirt. Dermatophytes also thrive in warm, moist places, so infection during summer months is most common. Due to these conditions, horses often experience ringworm beneath their saddling area and around their girth.

    Diagnosis

    • While different animals present different symptoms, generally all animals show lesions on the skin at the site of the infection. In horses, hair loss occurs in a circular pattern, while the exposed skin appears scabby and flaky. If untreated, the circles will grow in size and scabs can form on the skin. In cattle, ringworm appears as a scaly, gray or white lesion accompanied by hair loss. Ringworm is less common in pigs, but when it does appear, it is characterized by round, brown lesions. In sheep, raised, round areas generally appear and, if left untreated, can cause hair loss, light flaky scabs and occasionally pustules.

    Treatment

    • If you suspect your livestock is infected with ringworm, your veterinarian can confirm the infection is not something more serious. She can also recommend an antifungal wash and topical ointment to treat the infection. In the rare case of an extensive or stubborn infection, your veterinarian may prescribe an oral antifungal treatment.

    Prevention

    • According to Horseandhound.co.uk, the key to prevention is keeping infected animals separate from other animals so they cannot have skin-to-skin contact with them. A ringworm vaccination is available for cattle; however, according to Canadiancattlemen.ca, the best method for prevention is the thorough and regular cleaning of the barn or other infected area and any storage facilities that have come in contact with the animal.

    Protecting Yourself

    • Ringworm can be passed from livestock to humans, and the symptoms present in human infection, such as itching, are usually more severe and uncomfortable. Ringworm.com.au recommends avoiding the infected animal completely; however, if administering treatment, they recommend washing your hands thoroughly after handling the infected animal.