Percentage of isolates of the most prevalent GTs in the ENP per year.

<p>Numbers are given for years 2005–2010 when most of the samples were collected. Years 1983, 1987 and 1988–2002, including sampling gaps in 1990, 1993, 1996–99, and 2001, are pooled into the first data point. Total sample sizes are shown below x-axis.</p

Genetic distance as a function of temporal distance and host species similarity.

<p>Isolates of <i>Bacillus anthracis</i> collected from the ENP during the period 1983–2010 are included.</p

Median probabilities and 95% credible intervals for genotypes sampled from the Etosha National Park.

<p>GTs occurring ≤5 times are pooled into the “Other” category.</p

Distribution of genotypes isolated by year.

<p>The total number of isolates per year and per GT. GTs 2, 3, 6, 9, 18, and 22 (highlighted in grey) were found both within and outside the ENP.</p

Confirmed cases of anthrax in the four most commonly affected species in the ENP.

<p>The period between 1988–2010 is shown. Isolates prior to 1988 have been excluded from this figure, having been collected during only short field studies in the Park. The insert indicates the mean monthly rain fall (in l/m²) in the Okaukuejo region, in 1983–2010.</p