Table 1.

Comparison of the number of rodent holes in the intervention and control villages, Natanz county, Iran.

	1997	1998	1999	2000	2001	2002
Abbasabad
May	9652	793	967	555	733	798
October	ND	ND	1421	1395	1454	3329*
Imamzadeh
May	3541	871	3629*	741	378	705
October	ND	ND	2742*	496	719	2073*
Matinabad (control)
May	18 992	18 940	5602	5697	1833	1836
October	ND	ND	8657	6074	2356	7255

^*Number of rodent holes increased by 30% or more of the number of holes before treatment in May 1997 (ND, not determined).

P<0.000001 changes in number of rodent holes from year-to-year in intervention and control villages.