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Table 5 Guide to interpretation of pooled (or composite) fecal egg counts in lambs

From: Practical guide to the diagnostics of ruminant gastrointestinal nematodes, liver fluke and lungworm infection: interpretation and usability of results

Worm egg count (EPG)

Comment

Action

 < 200

Low egg count

Treatment probably not justified. Continue monitoring

200–500

Some clinical disease could be present

Anthelmintic treatment should be beneficial in individuals

500–1000 eggs

Clinical disease likely in a large proportion of the group

Anthelmintic treatment necessary to a large proportion of the group

1000+ eggs

Clinical disease likely in the whole group with some individuals heavily infected

Anthelmintic treatment necessary to a large proportion of the group

  1. Reference: [27]