Faecal egg count reduction test

Once a new case of resistance has been confirmed, detection will then most likely rely on the reduction of egg counts after treatment (faecal egg count reduction test (FECRT)). Allowance must be made for temporary sterilization of the worms, or in the case of tapeworms, destrobilation. Interpretation of results may be further complicated by development of immature forms in cases where drugs only kill adult worms. No such tests have been adequately investigated for detecting resistance in cestodes or trematodes. 

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