Daily variability of equine fecal strongyle egg counts.
Fecal egg counts often are used for diagnosing equine strongyle infections and estimating the number of eggs shed in the feces. An individual egg count should be interpreted in view of the normal fluctuation of egg numbers in an individual horse. In this study, the daily variability of strongyle fecal egg counts from horses was investigated. The Cornell-McMaster egg-counting technique was used to estimate the eggs per gram of feces in repeated daily fecal samples from 39 horses. The variation of the daily egg counts across 4 days was greater than would be expected if a consistent number of eggs were produced and dispersed randomly in the feces. The means and variances of the daily counts from each horse had a logarithmic relationship. For practical purposes, however, the fluctuation of egg counts is low enough for the fecal egg count to be used to identify horses for treatment, to estimate pasture contamination, or to assess response to therapy.
Warnick
L D
LD
Department of Clinical Sciences, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853.
D000818:Animals; D016009:Chi-Square Distribution; D005243:Feces / Q000469:parasitology*; D005260:Female; D006736:Horses; D008297:Male; D016011:Normal Distribution; D010270:Parasite Egg Count / Q000662:veterinary*; D016012:Poisson Distribution; D013319:Strongyle Infections, Equine / Q000469:parasitology*; D013320:Strongyloidea / Q000254:growth & development*