How do you mean? The case for composite faecal egg counts in testing for drench resistance.
McKenna
P B
PB
D000818:Animals; D000871:Anthelmintics / Q000627:therapeutic use*; D004351:Drug Resistance; D005243:Feces / Q000469:parasitology; D006374:Helminthiasis, Animal / Q000188:drug therapy* / Q000469:parasitology; D010270:Parasite Egg Count / Q000662:veterinary*; D011237:Predictive Value of Tests; D012756:Sheep; D012757:Sheep Diseases / Q000188:drug therapy* / Q000469:parasitology
D000871:Anthelmintics