Two specimens, as the one seen in Image 1, were submitted to the parasitology diagnostic laboratory. The specimens were collected from a 5-year-old mare with history of pruritus and scaly coat on the back.
Image 1: Specimen removed from a horse.
Werneckiella equi (Damalinia equi), is the horse biting louse that belongs to the suborder Ischnocera. Lice from this group are characterized by having salient three-jointed antennae in species that infest mammals, comparing to the five-jointed antennae that infest birds, they feed on epithelial cells and skin debris. Groups of horses with poor body condition and confined in small spaces are more likely to be affected.
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