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4. Parasitology 145
These 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 where
meat 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; nothing
in the centre.
Colour: brownish-yellow or colourless.
Fig. 4.86 Digested meat fibres
Air 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 Soap
Plant hairs (Fig. 4.90)
Size: very variable (50–300mm).
Shape: rather rigid, often curved; wide and clean-cut at one end, tapered at the
other.
Content: a narrow empty central canal between two transparent shiny layers.
Colour: pale yellow.
Fig. 4.88 Air bubbles
Fig. 4.89 Oil droplets