THE REPEATABILITY OF FECAL EGG COUNTS, PERIPHERAL EOSINOPHIL COUNTS, AND PLASMA PEPSINOGEN CONCENTRATIONS DURING DELIBERATE INFECTIONS WITH OSTERTAGIA-CIRCUMCINCTA

MJ STEAR*, SC BISHOP, JL DUNCAN, QA MCKELLAR, M MURRAY

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Faecal egg counts, peripheral blood eosinophil counts and plasma pepsinogen concentrations were monitored during 2 successive, deliberate infections in 24 Scottish Blackface sheep. For all 3 techniques, the repeatability of replicate counts or of measurements made at short intervals were high which suggests that all 3 assays were reliable, Within an infection the repeatability of different samples from the same animal decreased as the interval between samples increased, The repeatability between infections was only moderate for faecal egg counts but high for peripheral eosinophil counts and plasma pepsinogen concentrations, Of the 3 variables, faecal egg count was the most strongly associated with the worm burden. Together, the three variables accounted for, in a statistical sense, one half of the variation in worm burden. The three variables, if measured concurrently, should provide a more effective identification of resistant and susceptible lambs.

Original languageEnglish
Pages (from-to)375-380
Number of pages6
JournalInternational Journal For Parasitology
Volume25
Issue number3
Publication statusPublished - Mar 1995

Keywords

  • SHEEP
  • NEMATODE
  • OSTERTAGIA CIRCUMCINCTA
  • TELADORSAGIA CIRCUMCINCTA
  • REPEATABILITY
  • FECAL EGG COUNT
  • EOSINOPHILIA
  • PEPSINOGEN
  • MARKERS
  • MAJOR HISTOCOMPATIBILITY SYSTEM
  • CLASS-I ANTIGENS

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