Table 3. Colistin resistant and mcr-1 positive Salmonella strains from animals in China, 2007–2015.
| Year | Animals | Strains tested for colistin MIC | Resistant to colistin | Proportion of mcr-1 positive (n) among colistin-resistant Salmonella strains (N)a |
|---|---|---|---|---|
| 2007 | Avian | 44 | 2 | 1/2 |
| 2008 | Avian | 53 | 5 | 0/5 |
| 2008 | Swine | 7 | 3 | 2/3 |
| 2009 | Avian | 28 | 1 | 0/1 |
| 2009 | Swine | 3 | 1 | 1/1 |
| 2010 | Avian | 11 | 4 | 1/4 |
| 2010 | Swine | 3 | 0 | N.a. |
| 2012 | Avian | 42 | 5 | 0/5 |
| 2014 | Avian | 17 | 0 | N.a. |
| 2014 | Swine | 11 | 0 | N.a. |
| 2015 | Avian | 51 | 1 | 0/1 |
| 2015 | Swine | 6 | 0 | N.a. |
aN.a. means not available.