04/07/2024
Did you know horses can get lice? Randy presented for bilateral nasal discharge, fever, pruritis (itchiness), and alopecia (hair loss). We quickly resolved his respiratory infection with antibiotics and now his owner is going to focus on getting rid of these unwanted guests. In the comment section, you will find close up videos of the lice!
Lice infestation is called pediculosis and is more common in sick, debilitated, possibly under conditioned, immunosuppressed animals. Pediculosis in horses is characterized by pruritus (scratching, rubbing, biting, etc), skin irritation, unthrifty appearance, a rough ‘unkept’ hair coat, and possibly a loss of body condition. In severe infestations, hair loss and skin scarification are often seen, and in the case of sucking lice, anemia may be present. Although both types of lice can be found anywhere on the horse, the chewing lice are more common on the head, mane, tail base, and shoulders; whereas the sucking lice are more commonly found in shorter haired regions of the horse (eg. head, neck, back, and inner thigh). Lice infestations and subsequent clinical signs are more common in late winter and early spring.
Equine lice are not contagious to humans and can be treated with ivermectin/moxidectin and/or topical insecticides.
Read this article to learn more about equine lice:https://aaep.org/sites/default/files/2021-02/Lice.pdf