Peer-reviewed veterinary case report
A case of Borrelia-associated cutaneous pseudolymphoma in a horse.
- Journal:
- Veterinary dermatology
- Year:
- 2012
- Authors:
- Sears, Kelly P et al.
- Affiliation:
- Fairfield Equine Associates · United States
- Species:
- horse
Plain-English summary
A 10-year-old horse developed several small bumps on its face after a tick was removed from that area three months earlier. A skin sample taken from one of the bumps showed signs that could indicate a type of skin lymphoma or a similar condition linked to tick bites. Tests confirmed the presence of Borrelia, a type of bacteria often carried by ticks, and the horse responded well to treatment with doxycycline, an antibiotic. Overall, the treatment was effective in addressing the horse's condition.
Abstract
This case report describes a 10-year-old horse that developed multiple dermal papules over the right masseter area following removal of a tick from the same site 3 months earlier. Histological examination of a biopsy from a papule was suggestive of either a T-cell-rich B-cell lymphoma or cutaneous lymphoid hyperplasia, a form of pseudolymphoma sometimes associated with a tick bite. Positive serological testing and PCR of the biopsy sample for Borrelia in conjunction with immunohistochemical testing of the skin biopsy, the clinical history and response to treatment with doxycycline strongly supported the diagnosis of Borrelia-associated cutaneous pseudolymphoma.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/22029872/