TABLE 1.
Effect of Helichrysum italicum essential oil on the susceptibilities of gram-negative species to chloramphenicol
| Substancea | Chloramphenicol MIC (mg/liter) for indicated strainb
|
|||||
|---|---|---|---|---|---|---|
|
E. aerogenes
|
A. baumannii
|
P. aeruginosa
|
||||
| ATCC 13048 | EA27 | ATCC 19606 | AB1 | PAO1 | PA124 | |
| None | 8 | 1,024 | 32 | 32 | 512 | 128 |
| PAβN | 2 | 64 | 16 | 16 | 2 | 4 |
| H. italicum essential oil | 4 | 128 | 4 | 4 | 32 | 16 |
a
H. italicum essential oil was used at a concentration of 2.5%, and PAβN was used at a concentration of 20 mg/liter.
b
For a description of characteristics and origins of the strains, see Table S1 in the supplemental material.