Nineteen species of gastro-intestinal nematodes were recovered from 10 Burchell's zebra. These include: Cyathostomum alveatum, C. montgomeryi and C. tetracanthum; Cylicocyclus auriculatus, C. gyalocephaloides, C. insigne and C. triramosus; Cylicodontophorus schürmanni and Cylicodontophorus n.sp., Cylicostephanus bidentatus, C. calicatus and C. minutus; Poteriostomum ratzii, Craterostomum acuticaudatum, Triodontophorus minor, Habronema majus, H. muscae, H. zebrae, and Draschia megastoma, as well as Cylindropharynx spp. The highest burdens encountered were those of Cylicocyclus triramosus (159 491), Cylindropharynx (19 875), Cylicocyclus auriculatus (15 792), Cylicostephanus calicatus (16 658) and Cyathostomum tetracanthum (13 723). The nematodes consistently present in all zebras were: Cylicostephanus calicatus, Cylindropharynx spp. and Draschia megastoma.

Draschia, Habronema, horses, cutaneous infection (summer sores), efficacy of ivermectin

Thirty-seven Equus caballus, 18 Equus asinus and 22 mules from the States of Maranhão, Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Minas Gerais and Goiás had their stomachs examined to collect spirurid worms, and<br />the following species were found: Draschia megastoma (Rudolphi, 1819), Habronema muscae (Carter, 1861) and Habronema microstoma (Schneider, 1866). Prevalences, mean intensities and Male/Female ratios are considered. The variance analyses showed that no significant statistical differences ocurred among the mean intensities of H. muscae and H. Microstoma. | Foram examinados os estômagos de 37 Equus caballus, 18 Equus asinus e 22 muares, procedentes do Estado do Maranhão, Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Minas Gerais e Goiás, para a pesquisa de espirurídeos e foram encontrados: Draschia megastoma (Rudolphi, 1819), Habronema muscae (Carter, 1861) e Habronema microstoma (Schneider, 1866). Foram consideradas as prevalências, as intensidades médias e as relações Macho/Fêmea para estes parasitos, nos três hospedeiros. A análise de variância mostrou não ocorrerem diferenças estatisticamente significativas entre as intensidades médias de H. muscae e H. microstoma, inclusive na comparação entre os hospedeiros.