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As soon as the faecal samples arrive at the laboratory they should
be stored in a refrigerator at 4°C until they are processed.
Samples can be kept in the refrigerator for up to three weeks without
significant changes in the egg count and egg morphology.
Warning!!!
Samples should not be kept in the freezer.
The faeces can now be processed using the following techniques:
Faecal smear
McMaster
Flotation
Larval culture
Baermann
If it is not possible to store the samples in a refrigerator for
some time after collection, formalin can be added to the faeces
to preserve the eggs. The final concentration of formaldehyde in
the mixture should be at least 3% (for example by mixing 1 ml of
concentrated formalin with every 10 mls of faeces).
Warning!!!
Formalin fixed faeces cannot be used for faecal culture.
Health
and Safety Formalin is irritant and toxic: use with
care in a well ventilated space and avoid inhaling fumes. Local
Health and Safety regulations should be observed.
The faeces can now be processed using the following techniques:
Faecal smear
McMaster
Flotation
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