Fig 5. Number of bighorn sheep to sample to achieve adequate detection power to detect respiratory pathogens.

Minimum numbers to sample are those estimated to provide 80% power to detect a pathogen at 10% prevalence in a population of 100 animals using the specified protocol and number of samples per animal. One set of protocols was used to detect Pasteurellaceae organisms (shaded) and a separate set of protocols was used to detect Mycoplasma ovipneumoniae (not shaded). Protocols that used fee-for-service diagnostic tests are indicated with an asterisk (*) in the legend and above their symbols. Within each panel, protocols where detection probability was estimated at zero or one are not displayed. The same is true for protocols where the estimated number of animals required to sample in order to attain adequate detection power was greater than 100.