Manual of basic techniques for a health laboratory - libdoc.who.int

4. Parasitology 145These granules are the residue of starchy foods such as potatoes, beans,yams and cassava.Digested meat fibres (Fig. 4.86)Size: 100–200mm.Shape: oval or rectangular with rounded corners.Content: transparent with no granulations or lines (or residual lines wheremeat is not properly digested).Colour: yellow.Soaps (Fig. 4.87)Size: 20–100mm.Shape: round, oval or irregular (like a section of a tree trunk).Content: lines radiating from the centre and visible near the rim; nothingin the centre.Colour: brownish-yellow or colourless.Fig. 4.86 Digested meat fibresAir bubbles and oil droplets (Figs. 4.88 and 4.89)Size: variable (can be any size).Shape: perfectly round.False shell: a circular ring, very shiny (several layers in the case of oil).Content: none.Fig. 4.87 SoapPlant hairs (Fig. 4.90)Size: very variable (50–300mm).Shape: rather rigid, often curved; wide and clean-cut at one end, tapered at theother.Content: a narrow empty central canal between two transparent shiny layers.Colour: pale yellow.Fig. 4.88 Air bubblesFig. 4.89 Oil droplets