eggCounts (version 0.4-1)

fecrtCI: Compute standard FECRT according to WAAVP guidelines

Description

Computes the standard Faecal Egg Count Reduction test together with approximate confidence intervals according to the WAAVP guidelines (Coles et al., 1992, 2006). The function also returns bootstrap percentile confidence intervals.

Usage

fecrtCI(epg1, epg2, paired = FALSE, alpha = 0.05, R = 1999, ...)

Arguments

epg1

faecal egg counts in untreated animals

epg2

faecal egg counts in treated animals

paired

logical indication whether or not the samples are paired

alpha

confidence level of the intervals

R

number of bootstrap replicates

...

extra arguments (not used)

Value

• A list with
• estimate
  the estimated percentage reduction in mean epg rate
• bootCI
  corresponding percentile bootstrap confidence interval
• approxCI
  corresponding approximate confidence interval

References

Coles GC, Bauer C, Borgsteede FHM, Geerts S, Klei TR, Taylor MA, Waller, PJ (1992). World Association for the Advancement of Veterinary Parasitology (WAAVP) methods for the detection of anthelmintic resistance in nematodes of veterinary importance, Veterinary Parasitology, 44:35-44.

Coles GC, Jackson F, Pomroy WE, Prichard RK, von Samson-Himmelstjerna G, Silvestre A, Taylor MA, Vercruysse J (2006). The detection of anthelmintic resistance in nematodes of veterinary importance, VeterinaryParasitology, 136:167-185.

Examples

data(epgs)
fecrtCI(epgs$before, epgs$after, paired=TRUE)