PATHOLOGICAL CHANGES AND DISTRIBUTION OF LIBYOSTRONGYLUS DENTATUS AND L. DOUGLASSII IN THE STOMACH OF OSTRICHES
Autor(es): Lara Pereira de Souza, Josiana Gomes de Andrade, Eulógio Carlos Queiroz de Carvalho, Renato Augusto DaMatta, Clóvis de Paula Santos
PATHOLOGICAL CHANGES AND DISTRIBUTION OF LIBYOSTRONGYLUS DENTATUS AND L. DOUGLASSII IN THE STOMACH OF OSTRICHES
» Área de pesquisa: HELMINTOLOGIA
» Instituição: UENF
» Agência de fomento e patrocinadores: FAPERJ, CAPES,
Libyostrongylus genus include three species of nematodes that parasitize proventriculus and ventriculus of ostriches. Libyostrongylus dentatus and L. douglassii occur in Brazil and just a little is known about the distribution of these species and the possible anatomopathological changes in different regions of the proventriculus and ventriculus, chemical and mechanical stomach respectively. This study evaluated distribution of these species and pathological changes in the regions of the ventriculus and proventriculus of ostriches with high and low infection. Proventriculus and ventriculus of the six ostriches were necropsied and tissue samples from the anterior, middle and posterior region were collected and processed for counting of parasites and pathological analysis. The proventriculus was the organ most parasitized. Heterophilic infiltrate was found in infected animals and in high infections is more clustered near the nematodes. The nematodes eggs were observed only in that seems like keratin layer, from middle and posterior ventriculus in animals with low infection. The glandular region of the proventriculus, nematodes are localized in the adenomers secretory duct and cause serious injury with erosions and ulcerations, causing damages on glandular epithelium. These data are useful to control Libyostrongylus, as well as knowledge of the biology of these parasites in the infected tissue site.
