[The ethyl acetate method of studying feces for Opisthorchis eggs].

The ether-vinegar method used for the precipitation of helminths' oocysts is distinct from the ether-formalin one in progressive technology and lower toxicity of the reagents used. It can be applied for the diagnosis of opisthorchiasis with low invasion intensity.

[Improvement in the diagnosis of opisthorchiasis by fecal egg count].

Chemical sedimentation method of coproovoscopic diagnosis of trematodoses was modified: sodium nitrate was replaced by sodium nitrite (this increased the helminthic egg membrane hydrophilia) and the optimal ratio of sodium nitrite to acetic acid solution volumes was experimentally selected. This improved the method sensitivity twofold (p less than 0.001).