In formol-ether concentration technique, which layer contains the parasites?: (A) Ether, (B) Fecal debris, (C) Formal water, (D) Sediment
Answer is D. Concentration techniques include:Sedimentation techniquesFormol-ether concentration techniqueFormol detergent concentration techniqueFloatation techniquesSodium chloride floatation techniquesZinc sulphate floatation techniqueSugar floatation techniqueFormol-ether concentration technique is overall best sedimentation technique. It is rapid and gives good results. The figure shown in reference mentioned clearly shows sediment-containing parasites.