Analysis of multiyear studies in horses in Kentucky to ascertain whether counts of eggs and larvae per gram of feces are reliable indicators of numbers of strongyles and ascarids present.

摘要: Abstract Increasing levels of anthelmintic resistance in equine nematodes have led to recommendations more sustainable treatment protocols with emphasis on parasite surveillance and diagnosis, rather than prophylactic calendar-based treatments. This requires knowledge the diagnostic test performance techniques for counts eggs per gram feces (EPG) as well methods culturing, counting identifying third stage (L 3 ) strongyle larvae (LPG). For horses, such information does not exist published literature. The aim this study was examine relationship between worm count fecal egg (FEC) data Parascaris equorum infections larval culture diagnosing Strongylus spp. infections. Necropsy from 693 horses used critical or controlled tests, including total counts, results collected at University Kentucky over a period 50 years were analyzed. Sensitivity, specificity, positive negative predictive values, receiver operator characteristic (ROC) curves generated cultures ascarid counts. potential FEC cutoff values evaluated statistically by comparing below above chosen values. All tests had high (>0.95), but moderate (