- Abnormal hairs, follicular casts, scales and crusts may
provide important evidence of the existence and nature of
follicular or surface pathology
- Do not be tempted to dismiss the specimen as being merely
‘positive’ or ‘negative’ because you
did or did not find what you expected or hoped for
- The use of these procedures may provide a definitive diagnosis
but in other cases failure to demonstrate a particular pathogen
or pathological feature can be useful in narrowing the list
of possibilities
- Remember that failure to find a particular feature or
agent does not prove that it is not there
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Classical skin scraping from canine
sarcoptic mange
Eggs and faeces are present but no adults
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