Circulating serogroups of Leptospira in swine from a 7-year study in France (2011–2017)

Table 2 Features of the dataset (n = 19,343) and distribution of the seropositive and seronegative pigs and farms over time from 2011 to 2017.

Year	2011	2012	2013	2014	2015	2016	2017
Total tested samples	795	2770	3089	3965	3715	4846	163
Number of seropositive pigs	190	550	597	988	664	1320	37
Number of seronegative pigs	605	2,220	2,492	2,977	3,051	3,526	126
Total tested farms	100	333	347	497	459	568	21
Number of tested positive farms	70	197	126	236	173	312	10
Number of tested negative farms	30	136	221	261	286	256	11
Minimum sample size per farm	1	1	1	1	1	1	1
Maximum sample size per farm	31	42	31	35	31	31	17
Median sample size per farm	7	7	8	7	7	8	8
Median number of seropositive samples per seropositive farm	2	2	4	4	3	4	3.5

Total tested pigs is the sum (in bold) of the two lines below (tested positive and negative). Total tested farms is the sum (in bold) of the two lines below (positive and negative)

ISSN: 2055-5660