Luk NMT, Hui M, Lee HCS, Fu LH, Liu ZH, Lam LY, Eastel M, Chan YKA, Tang LSN, Cheng TS, Siu FYC, Ng SC, Lai YKD, Ho KM. Antibiotic-resistant Propionibacterium acnes among acne patients in a regional skin centre in Hong Kong.
J Eur Acad Dermatol Venereol 2011;
27:31-6. [PMID:
22103749 DOI:
10.1111/j.1468-3083.2011.04351.x]
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Abstract
BACKGROUND
There has been no study on antibiotic-resistant Propionibacterium acnes in Hong Kong.
OBJECTIVE
We investigated the prevalence and pattern of antibiotic-resistant P. acnes and to identify any associated factors for harbouring the resistant strains.
METHODS
Culture and sensitivity testing of P. acnes to commonly used antibiotics were performed. Resistance to tetracycline was defined at a minimal inhibitory concentration (MIC) of 2 μg/mL or more; erythromycin at an MIC of 0.5 μg/mL or more; clindamycin at an MIC of 0.25 μg/mL or more according to EUCAST. For breakpoints of doxycycline and minocycline, those with an MIC of 1 μg/mL or more were defined as resistant strains.
RESULTS
Among the 111 specimens collected from 111 patients, 86 strains of P. acnes were recovered, one from each specimen. Twenty-five specimens had no growth. Forty-seven (54.8%) strains were found to be resistant to one or more antibiotics. Forty-six (53.5%), 18 (20.9%), 14 (16.3%), 14(16.3%) and 14 (16.3%) strains were resistant to clindamycin (CL), erythromycin (EM), tetracycline (TET), doxycycline (DOX) and minocycline (MR) respectively. Ten strains (11.6%) had cross resistance between the MLS antibiotics (erythromycin or clindamycin), one strain (1.2%) had cross resistance among the cyclines and 14 strains (16.4%) had cross resistance between the MLS and cycline antibiotics. Binary logistic regression showed an association between MLS antibiotic resistance with an increased age whereas cycline resistance was associated with the duration of treatment.
CONCLUSION
Antibiotic-resistant P. acnes is prevalent in Hong Kong. Dermatologists should be more vigilant in prescribing antibiotics for acne patients.
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