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Table 1 Categorization of ticks for counting (adapted from EMEA/CVMP/EWP/005/2000-Rev.2, 2007)

From: Efficacy of a fixed combination of permethrin 54.5% and fipronil 6.1% (Effitix®) in dogs experimentally infested with Ixodes ricinus

Category General findings Attachment status
1 Live Unengorged*
2 Live Engorged**
3 Killed Unengorged*
4 Killed Engorged**
  1. *no filling of the alloscutum evident.
  2. **obvious or conspicuous filling of the alloscutum evident.