Table 4. Numbers of isolates of each serotype and the Diversity index for serotyping and for MLVA types in the samples based on the enrichment methods.

Method	Serotype1/2a	Serotype1/2b	Serotype4b	Simpson’s Index ofDiversity (Serotypes)	Number ofMLVA Types	Simpson’s Index ofDiversity (MLVA Types)
Directplating	8	7	142	0.179	41	0.875
Fraserbroth	17	7	123	0.286	40	0.887
Total	25	14	265	0.232	62	0.881