Table 1.

Places from where 45 representative strains from the years 2007 and 2008 were included in this study

Sl. no.	Place	Total no. of strains	Strains in 2007	Strains in 2008
1.	Orissa	6	5	1
2.	Guwahati	4	4	0
3.	Pune	6	4	2
4.	Delhi	4	1	3
5.	Mumbai	1	0	1
6.	Surat	3	0	3
7.	Rohtak	1	1	0
8.	Chennai	4	3	1
9.	Kolkata	14	8	6
10.	Bihar	2	0	2
	Total	45	26	19