Table 1.

Numbers of dogs that were enrolled in the study at each sampling point, and the numbers of dogs enrolled that were tested for anti-saliva antibody

Sampling round	Midpoint date	Day	No. of dogs enrolled	No. of tested dogs enrolled
1	11 April 1993	0	30	17
2	30 June 1993	80	21	14
3	28 August 1993	139	37	17
4	5 November 1993	208	16	4
5	13 January 1994	277	6	3
6	23 March 1994	346	2	1
7	30 May 1994	414	9	1
8	6 August 1994	482	0	0
9	12 October 1994	549	0	0
10	10 December 1994	608	5	1
11	19 February 1995	683	0	0
12	24 April 1995	746	0	0
13	6 July 1995	818	0	0
Total			126	58