Volume 10, Number 6—June 2004
Research
Antimicrobial Resistance among Campylobacter Strains, United States, 1997–2001
Table 1
Antimicrobial resistance among Campylobacter isolates by species, NARMS 1997–2001
% Resistant | |||||||||
---|---|---|---|---|---|---|---|---|---|
Antimicrobial |
C. jejuni (n = 1,471) |
C. coli (n = 63) |
C. upsaliensis (n = 7) |
C. lari (n = 2) |
C. fetus (n = 5) |
Undetermineda (n = 5 ) |
Total (n = 1,553) |
||
Azithromycinb |
2 |
9 |
0 |
0 |
0 |
0 |
2 |
||
Chloramphenicol |
0.3 |
5 |
0 |
0 |
0 |
40 |
0.6 |
||
Ciprofloxacin |
16 |
30c |
14 |
0 |
0 |
0 |
16 |
||
Clindamycin |
1 |
9 |
0 |
0 |
0 |
20 |
2 |
||
Erythromycin |
2 |
8 |
0 |
0 |
0 |
20 |
2 |
||
Gentamicinb |
0 |
2 |
0 |
0 |
0 |
0 |
0.1 |
||
Nalidixic acid |
17 |
36c |
14 |
100 |
80 |
20 |
18 |
||
Tetracycline | 43 | 43 | 0 | 0 | 20 | 0 | 43 |
aUndetermined isolates were hippurate-negative Campylobacter that could not be further speciated with available polymerase chain reaction primers.
bFor azithromycin and gentamicin, only 1,336 isolates were tested.
cComparison of proportion of resistant C. coli to resistant C. jejuni was statistically significant for ciprofloxacin and nalidixic acid but not tetracycline (p < 0.01)