Table 1. Prevalence of mcr-1-bearing bacteria in food, environmental, animal and human faecal samples, December 2015−May 2016.
| Specimen types | Number of specimens | Number of positive samples | % positive | Bacterial species recoverable (number of isolates) |
|---|---|---|---|---|
| Food | 1,371 | 498 | 36 | Escherichia coli (730), Klebsiella pneumoniae (3), Aeromonas veronii (4) |
| Shenzhen | 620 | 177 | 29 | |
| Meat | 230 | 150 | 65 | |
| Others | 390 | 27 | 7 | |
| Hong Kong | 517 | 215 | 42 | |
| Meat | 376 | 196 | 52 | |
| Others | 141 | 19 | 13 | |
| Overseas | 234 | 106 | 45 | |
| Meat | 222 | 104 | 47 | |
| Other | 12 | 2 | 17 | |
| Animal faeces | 480 | 243 | 51 | E. coli (576), K. pneumoniae (10), Enterobacter cloacae (4) |
| Piga | 245 | 124 | 51 | |
| Chickena | 180 | 113 | 63 | |
| Petb | 55 | 6 | 11 | |
| Humanc | 150 | 42 | 28 | E. coli (84), E. cloacae (5) |
| Inpatients | 85 | 22 | 26 | |
| Healthy individuals | 65 | 20 | 31 | |
| Water | 34 | 24 | 71 | E. coli (77), K. pneumoniae (4), K. variicola (3) |
| Sewage | 24 | 18 | 75 | E. coli (52), K. pneumoniae (4), K. variicola (3) |
| Seawater | 6 | 6 | 100 | E. coli (25) |
| Fresh water | 4 | 0 | 0 | None (0) |
a Chicken and pig faecal samples were collected from farms located in the Provinces of Fujian, Guangdong, Henan, Hubei, Jiangshu, Shandong, Shanxi and Zhejiang. The contamination rate of faecal samples collected from farms located in different provinces of China was 63% (25/40) in Fujian, 14% (8/58) in Guangdong, 55% (30/55) in Henan, 83% (75/90) in Hubei, 56% (28/50) in Jiangshu, 100% (42/42) in Shandong, 70% (28/40) in Shanxi, and 50% (25/50) in Zhejiang.
b Pet faecal samples were collected from three animal hospitals located in various geographical sites in Shenzhen city.
c Human faecal samples were obtained from in- and outpatients in four different hospitals located in Shenzhen city and adjacent areas.