Infecção natural por Setaria sp. em equino no Município de Petrolina, Pernambuco: relato de caso

Abstract

The helminth Setaria sp. is a parasite of the Onchocercidae family that causes settariosis, whose transmission is through the bite of vectors of the Culicidae family. This nematode has several domestic species as hosts, including equids. The parasite normally inhabits the abdomen of affected animals, and may migrate to other tissues, including the nervous system. Due to the few reports in the literature, the objective was to describe the occurrence of natural work in horses by Setaria sp. in the municipality of Petrolina, Pernambuco. A male horse, crossbred quarter mile, with an estimated age of 12 years, was treated for elective orchiectomy surgery. The animal is auscultated with healthy movements, frequencies of 30 beats and mucous membranes per minute and ocular according to its minute movements, oral and oral. After establishing the protocol, the procedure was performed with the station and in a containment trunk. The technique used was considered open with the use of a “Reimer” type emasculator. When the testicular pouch was exposed to expose the gonads, the presence of three adult helminths, whitish, long and slender, was observed, which were collected, kept in a tube with saline solution and sent to the Parasitology Laboratory of the Federal University of Recôncavo from Bahia for your identification. A measurement of the parasites that had sizes of 9.0 cm and 4.5 cm in length was performed. Microscopically, the characteristic chitinous perioral ring and cephalic papillae were observed. In the animal, laboratory tests of blood count and OPG were performed, the first showing normal normocytic anemia and the second not revealing other larval forms of the parasite, which is consistent with the cases in the literature. Although adults of Setaria sp. do not often produce symptoms in equids, when larval abnormalities occur, the occurrence of systematics to be maintained can occur and cause locomotor disorders. Therefore, the importance of instituting prophylactics to contain the parasite and its vectors in the Petrolina region is emphasized. In addition, further research is needed regarding infection by Setaria sp. in horses, since settariosis can serve as a differential diagnosis for other pathologies of the nervous system.