Which test is most useful for detecting reduced efficacy of an anthelmintic in a flock?

Correct answer: D. Fecal egg count reduction test

  • A. Schirmer tear test
  • B. Serum protein electrophoresis
  • C. Direct antiglobulin test
  • D. Fecal egg count reduction test

Explanation

The fecal egg count reduction test compares parasite egg counts before and after treatment and helps identify anthelmintic resistance. The other tests assess blood proteins, immune-mediated haemolysis, and tear production.

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