| It is impossible to guess the prevalence of this condition, he says, because most people with such fantasies would never act them out. |
| Prevalence figures from survey responders may have caused an overestimation of the true population prevalence by a modest amount. |
| Other reported sites, in order of prevalence, include the bones, brain, kidneys, and adrenal glands. |
| Results of transversal studies are used for the construction of confidence intervals when estimating within-farm prevalences. |
| Many, mainly rural, areas had prevalences well below one per 1,000, but cases were found in all local authorities in England and Wales. |
| Vaccination of layers is considered useful as a measure to reduce shedding and egg contamination, when the purpose is to reduce high prevalences. |
