Table 1.
Detection frequencies of ESBL/AmpC-producing E. coli obtained from cloacal swabs from seven German broiler fattening farms
| Samplingb | % ESBL/AmpC-positive samples (total no.) for farma: |
|||||||
|---|---|---|---|---|---|---|---|---|
| All | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| First | 51 (140) | 85 (n = 20) | 95 (20); ENR | 40 (20); AMX, INN | 60 (20) | 55 (20); ENR | 0 (20); ENR | 20 (20); ENR |
| Second | 75 (140) | 100 (20) | 60 (20) | 60 (20); PEN, COL | 85 (20); COL | 75 (20) | 95 (20) | 50 (20); ENR |
| Third | 76 (140) | 100 (20) | 85 (20) | 85 (20) | 75 (20) | 25 (20) | 100 (20) | 68 (20) |
a
Numbers in parentheses are numbers of samples from all farms at each sampling. Between-sample antimicrobial treatments, if any, are listed after the numbers of samples. COL, colistin; ENR, enrofloxacine; AMX, amoxicillin; INN, neomycin; PEN, benzylpenicillin.
b
First sampling, about the 1st to 2nd day of life; second sampling, about the 14th to 18th day of life; third sampling, about the 26th to 35th day of life.