Habronema muscae (Carter 1861) Diesing, 1861: descrição de formas imaturas, uma nova técnica de diagnóstico e a prevalência da habronemíase gástrica no Estado de Mato Grosso do Sul

Abstract

The immature forms liberated by female Habronema muscae (Carter, 1861) Diesing, 1861 are described and defined as first stage larvae. A modified UENO (1968) and UENO & GUTIERRES (1968) technique is proposed to show these first stage larvae of H. muscae in horse faeces; this technique is also capable of carrying out the parasitological diagnosis of gastric habronemiasis caused by this species. The results of this technique show a coefficient of linear correlation of 77% when compared with the number of females recovered post-mortem. The prevalence of H. muscae was determined as 95,45% in the stomach of horses in Mato Grosso do Sul State while only one animal was found to be parasitized by Draschia megastoma (Rudolphi, 1819). Morphological and morphometric descriptions are given of the immature parasitic forms of H. muscae: L3 initial and final, L4 initial and final and L5 x i i i initial. The morphogenesis of the labial portion of the parasitic phase of H. muscae is also described.