Effect of stage and area on the infection rate.

<p>The infection rate was higher for adult than juvenile <i>Peromyscus leucopus</i> mice and differed among the four areas. The infection rate is the instantaneous probability that a mouse will acquire a <i>Borrelia burgdorferi</i> infection after surviving through a time interval of 30 days. The infection rates are shown for a reference mouse, which is an adult female susceptible mouse living in the control area in May 2000. Shown are the means and the 95% confidence limits. The parameter estimates include variation due to model uncertainty.