Clustering of Mycobacterium tuberculosis Cases in Acapulco: Spoligotyping and Risk Factors

Figure 2

Geographical distribution of tuberculosis cases in Acapulco, Mexico. Mapping and georeferencing of tuberculosis cases used a scale of 1 : 50000. Point cluster analysis relied on the IDRISI QUADRAT module. The variance/mean ratio significantly smaller than 1.0 suggests a regular distribution, while values greater than 1.0 suggest spatial clustering.

(a) Comparison of Mycobacterium tuberculosis strains with unique patterns versus cluster spoligotypes.

(b) Comparison of Mycobacterium tuberculosis strains of cluster one (Manila genotype) with other clusters or unique spoligotype patterns.