Adult Gnathostoma cf. binucleatum obtained from dogs experimentally infected with larvae as an etiological agent in Mexican gnathostomiasis: External morphology
Por:
Koga M., Akahane H., Ogata K., Lamothe-Argumedo R., Osorio-Sarabia D., García-Prieto L., Martínez-Cruz J.M.
Publicada:
1 ene 1999
Resumen:
We examined the muscles of 3 pelicans and obtained as many as 570 gnathostome larvae. Each of 2 dogs was experimentally infected with 20 larvae obtained using this method. Eight and 9 mo later, 4 and 9 adults were obtained from the gastric nodules in each dog, respectively. The morphology of the worms and eggs was examined, primarily using scanning electron microscopy (SEM) to identify the species. The adults demonstrated tridentate cuticular spines in their anterior forefront regions. The shape of the cuticular spines changed to di- and monodentate forms in the anterior one-third of the body. Very minute monodentate spines covered the posterior two-thirds of the body. The ventral surface of the tail of the male had 4 pairs of caudal papillae and 3 pairs of small papillae. The spines in this area were short. The morphological characteristics of the adults examined for this study were very similar to those of Gnathostoma spinigerum. One noticeable difference between G. spinigerum and the present specimens was the egg surface morphology. We found no pits on the eggshell surface of our specimens. In contrast, G. spinigerum has clear pits on its eggshell. The 3 previously reported gnathostomes indigenous to Latin America, G. turgidum, G. procyonis, and G. americanum, also have many pits on their eggshells. The adult worms of these 3 species have multidigitated spines on their anterior regions, and except for G. turgidum, obvious spines cover their entire body surfaces. However, the eggs of G. turgidum have bipolar plugs. In these latter features, the present species was more similar to G. binucleatum.
Filiaciones:
Koga M.:
Department of Parasitology, Faculty of Medicine, Kyushu University, Fukuoka 812-8582, Japan
Akahane H.:
Department of Parasitology, School of Medicine, Fukuoka University, Fukuoka 814-0180, Japan
Ogata K.:
Department of Dermatology, Miyazaki Medical College, Kiyotake, Miyazaki 889-16, Japan
Lamothe-Argumedo R.:
Laboratorio de Helmintología, Departamento de Zoología, Univ. Nac. Autonóma de Mexico, 04510 D. F., Mexico, Mexico
Osorio-Sarabia D.:
Laboratorio de Helmintología, Departamento de Zoología, Univ. Nac. Autonóma de Mexico, 04510 D. F., Mexico, Mexico
García-Prieto L.:
Laboratorio de Helmintología, Departamento de Zoología, Univ. Nac. Autonóma de Mexico, 04510 D. F., Mexico, Mexico
Martínez-Cruz J.M.:
Pedro Garcia, No. 918 Tierra Blanca, Veracruz, Mexico
|