Year | Number of sites investigated | Number of positive sites | Positive rate in the study site (%) | Number of mice examined | Number of positive mice | Positive rate in mice (%) |
---|---|---|---|---|---|---|
2009 | 55 | 5 | 9.09 | 1 074 | 14 | 1.3 |
2010 | 55 | 0 | 0 | 954 | 0 | 0 |
2011 | 60 | 0 | 0 | 1 128 | 0 | 0 |
2012 | 70 | 0 | 0 | 1 177 | 0 | 0 |
2013 | 36 | 0 | 0 | 696 | 0 | 0 |
2014 | 75 | 0 | 0 | 1 477 | 0 | 0 |
Total | 351 | 5 | 1.42 | 6 506 | 14 | 0.22 |