Parasitología al día
versión impresa ISSN 0716-0720
BASSO, WALTER U.; VENTURINI, LUCILA y RISSO, MIGUEL A.. COMPARACION DE TECNICAS PARASITOLOGICAS PARA EL EXAMEN DE HECES DE PERRO . Parasitol. día [online]. 1998, vol.22, n.1-2, pp. 52-56. ISSN 0716-0720. doi: 10.4067/S0716-07201998000100011.
The following techniques of fecal examination for parasite detection were evaluated comparatively: Sheater modified (flotation by sugar solution), Zinc sulfate (flotation by this salt solution) and Ritchie modified (sedimentation with formalin-saline solution and fats extraction by ether). Parasites were detected in 25 of 40 fecal samples of dogs examined by the three techniques. There were no differences among the techniques of Sheater and Zinc sulfate in the quantity of detections (37 and 38 respectively) but the corresponding value to formalin-ether (16) was significantly smaller. The quantities of eggs of Toxocara canis and Trichuris vulpis (213 and 334 respectively) detected by Sheater in fresh feces were significantly greater than those corresponding to zinc sulfate (44 and 13 respectively). The results were similar for fecal samples with eggs of T. vulpis and formalin (Sheater: 61 vs zinc sulfate: 0). The quantities of cysts of Giardia detected by formalin-ether in feces with and without formalin were significantly greater than those corresponding to zinc sulfate (19 and 87 vs 3 and 36 respectively). In 180 samples examined, the quantity of detections of Giardia sp. was significantly greater by the formalin-ether technique, than by that of Sheater (15 vs 1, respectively). The technique of Sheater was more efficient than that of zinc sulfate for the detection of nematode eggs while that of formalin-ether was more efficient for the detection of Giardia sp cysts. On agreement with the results, it is recommended that, unless special indications, each sample that requires parasitological examination should be processed by both techniques: that of Sheater and that of formalin-ether
Palabras clave : Fecal examination; Laboratory technique; Dogs parasites.