Incidence of cutaneous habronemosis in Manipuri ponies in India

Abstract

Information pertaining to parasitic fauna and parasitic diseases in Manipuri ponies in India is not available. Moreover, no systematic studies have been undertaken on cutaneous habronemosis in Manipuri ponies which is a common skin problem of Manipuri ponies as reported by pony owners. Keeping in the view of the importance of parasitic infections in veterinary health coverage particularly in Manipuri ponies, the present study was planned. A survey of natural cases of cutaneous habronemosis followed by molecular confirmation of species involved and treatments were done. Out of 200 ponies examined, nine cases (4.5%) of cutaneous habronemosis was recorded. Gross examination revealed raised and ulcerated wounds with necrotic tissues covered with yellowish-tan granulation. Histopathological study revealed eosinophilic granuloma and in the center of the granuloma with necrotic debris. Remnants of the Hebronema larvae with infiltrating neutrophils surrounded by proliferating fibrous tissue with numerous eosinophils, macrophages and lymphocytes were also observed. Molecular detection of Habronema sp. was confirmed by semi-nested PCR. Sequence analysis revealed larvae of H. muscae was the common spirurid species responsible for producing cutaneous habronemosis in Manipuri ponies. Subsequently, sequence submitted to NCBI GenBank and accession number obtained (MH038181). Surgical removal of necrotic tissue, ivermectin injection along with antibiotics successfully cured all the lesions i…