Figure 3.

Spatial distribution of significant high rate giardiasis clusters in southern Ontario (1990–98). Only geographically large clusters have been presented in this map. Detailed descriptions of these clusters as well as the geographically smaller clusters (not presented in this figure) are presented in Table 1. Numerical identification of the clusters are in order of their likelihood ratio; the cluster with the highest likelihood ratio is cluster 1 (most likely cluster) while cluster 2 had the second highest likelihood ratio, etc.