Dendrogram, produced by BioImage whole-band analysis V.3.42 software (Genomic Solutions, Ann Arbor, Mich.), showing the relationship of 53 RFLP patterns identified in 67 MTC isolates from CSF cultures. RFLP patterns were compared by using the Jaccard matching method with an allowed band size deviation of 2.5%, and the dendrogram showing the relationships between patterns was generated with the unweighted pair group method using arithmetic averages.