From: Regulation of the erm(C) Gene in Staphylococci from Reservoir with Different Usage of Macrolides
 |  | Presence and regulation of erm(C) among staphylococci of human and animal origin | |||
---|---|---|---|---|---|
 | Origin | Human | Cattle | Pigs | |
 |  | S. aureus | staphylococci | S. hyicus | |
 | Year | 1995–1998 | 1995–1998 | 1995–1998 | 2001 |
 | Usage | low | moderate | high | low |
 | n = | 45 | 29 | 96 | 15 |
erm(C) | positive* | 69 | 100 | 99 | 47 |
 | regulated | 81 | 31 | 9 | 43 |
 | constitutive | 19 | 69 | 91 | 57 |