الأحد , نوفمبر 17 2019
الرئيسية / Engilsh / OVA DETECTOR

OVA DETECTOR


OVA DETECTOR IS A SIEVE SYSTEM FOR THE RECOVERY OF HELMINTHS EGGS FROM FECAL SPECIMENS OF BOTH HUMAN AND ANIMALS. OVA DETECTOR PROVIDES A CONVENIENT AND REPRODUCIBLE METHOD FOR DETECTING PARASITES EVEN WHEN PRESENT IN VERY LOW NUMBERS. THE DIAGNOSIS OF PARASITIC INFECTION IS CONFIRMED BY THE RECOVERY OF HELMINTHS EGGS. THIS APPARATUS IS USED TO DIAGNOSE TREMATODE, CESTODE AND NEMATODE OVA; WHERE 2 GM OF FECES ARE APPLIED ON THREE SUCCESSIVE SIEVE SYSTEM. THE FIRST ONE OF 400 MICRONS/PORE WHICH PERMITS THE PASSAGE OF EGGS AND FINE PARTICLES ONLY FOLLOWED BY A SECOND ONE OF 100 MICRONS/PORE; WHICH IS ABLE TO PREVENT THE LARGE EGGS (TREMATODE) FROM PASSING AND KEEPS THEM ON THE SIEVE SURFACE. THE SECOND SIEVE IS FOLLOWED BY A THIRD ONE OF 40 MICRONS/PORE; WHICH IS ABLE TO PREVENT THE SMALL EGGS (CESTODE AND NEMATODE) FROM PASSING AND KEEPS THEM ON THE SIEVE SURFACE. THE CONTENT OVER THE SECOND AND THIRD SIEVES IS TRANSFERRED TO A SMALL PETRI DISH USING PUSHED TAP WATER. EXAMINATION UNDER THE MICROSCOPE IS PERFORMED; WHERE THE NUMBER OF EGGS PER GRAM OF FECES IS CALCULATED AFTER 2 TIMES EXAMINATION PER SAMPLE. THE SIEVES PROCEDURE SHOULD BE PERFORMED AS A ROUTINE PART OF A COMPLETE EXAMINATION FOR HELMINTHS


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