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Peer-reviewed veterinary case report

A Hypoderma diana (Diptera: Hypodermatidae) infection in a horse.

Journal:
The veterinary quarterly
Year:
1989
Authors:
Hendrikx, W M et al.
Affiliation:
Veterinary Faculty · Netherlands
Species:
horse

Plain-English summary

A horse was found to have an infection caused by the second-stage larvae of a fly called H. diana, which is known to normally infect roe deer. The larvae couldn't grow into their next stage because horses aren't the right hosts for them, and the horse was treated with an insecticide that killed the larvae. This horse likely got the infection while working in the forest, where it came into contact with the flies. The treatment was effective in stopping the infection from progressing.

Abstract

An infection with second-stage larvae of the warble-fly H. diana in a horse is described. The second-stage larvae were incapable of developing into the third stage, because horses are unsuitable hosts and because the infected horse was treated with an insecticide. Since the horse was used for dragging trees in the forests, the infection was likely contracted via contact with H. diana, a normal parasite of roe deer in the Netherlands.

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Original publication: https://pubmed.ncbi.nlm.nih.gov/2718349/