Clinical characterization of dermonecrotic loxoscelism in equine of Córdoba, Colombia

Abstract

The aim of this study was to characterize the clinical aspects of dermonecroticloxoscelism (LDN) in horses department of Cordoba, Colombia. Thisstudy was descriptive, not probabilistic, in animals of convenience. Ninehorses (Equus ferus caballus) and 2 donkeys (Equus asinus africanus) wereused with LDN diagnosed clinically and histopathologically in different productionsof the Department. When describing the skin lesions, these werecharacterized by the presence of severe necrotic dermatitis, with edema anda focal erythematous area, when detailing the injured area, a central necroticspot and two halos around it (a medial white halo and a halo Violet) in mostof the cases studied; As well as absence of neurological and systemic signs.The lesions were located in most cases at the dorsal level, followed by therostral region, chest and penis. Histopathologically in the staining of HematoxylinEosin (H & E), severe piogranulomatous dermatitis was observed,with marked infiltration of polymorphonuclear cells especially neutrophils,with vacuolization of the basal layer of the epidermis and edema in thedermo-epidermal junction. The definitive diagnosis of LDN in the 11 animalsstudied was based on the clinical manifestations observed, the anatomopathologicalcharacteristics of the lesions and the histopathological results.The present report constitutes the first LDN report in the Department of Córdoba,since no reports were found in the consulted literature.