title: Detection of a new erm(X)-mediated antibiotic resistance in Egyptian cutaneous propionibacteria.
abstract: A total of 107 antibiotic-resistant propionibacteria were isolated from the face of 102 Egyptian acne patients, dermatology staff and controls. Erythromycin-clindamycin-resistant propionibacteria were chosen to detect erm(X) gene and it was detected in 29 of 107 (27%) strains. However, just 7 strains had IS1249I, 3 of them had also Tn5432. The erm(X) gene which is not carried on Tn5432 confers inducible resistance to telithromycin by erythromycin or clindamycin. The DNA sequences of the PCR amplification products of this new erm(X)-mediated antibiotic resistance showed >99% identity to the erm(X) gene isolated from a Corynebacterium jeikeium. Southern blotting analysis of the erm(X)-specific probe shows that there were two copies of this resistance gene integrated within the chromosomal DNA. This is the first report of erm(X) being carried by Propionibacterium acnes outside Europe. Whilst the gene is associated with Tn5432 in some strains, the data suggests other genetic element carrying erm(X). The high carriage of erm(X) may affect the efficacy of clindamycin and macrolides for acne treatment in Egypt.
authors.affiliation: Department of Biomedical Sciences, University of Bradford, UK. sata186@hotmail.com
authors.forename: T S
authors.initials: TS
authors.lastname: El-Mahdy
authors.forename: S
authors.initials: S
authors.lastname: Abdalla
authors.forename: R
authors.initials: R
authors.lastname: El-Domany
authors.forename: M S
authors.initials: MS
authors.lastname: Mohamed
authors.forename: J I
authors.initials: JI
authors.lastname: Ross
authors.forename: A M
authors.initials: AM
authors.lastname: Snelling
mesh_terms: D000152:Acne Vulgaris / Q000382:microbiology*; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D015139:Blotting, Southern; D002981:Clindamycin / Q000494:pharmacology; D004251:DNA Transposable Elements; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D024881:Drug Resistance, Bacterial; D004534:Egypt; D004917:Erythromycin / Q000494:pharmacology; D018628:Gene Dosage; D006801:Humans; D048628:Ketolides / Q000494:pharmacology; D018942:Macrolides / Q000494:pharmacology; D016133:Polymerase Chain Reaction; D011423:Propionibacteriaceae / Q000187:drug effects* / Q000235:genetics* / Q000302:isolation & purification; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D017192:Skin Diseases, Bacterial / Q000382:microbiology*; D015533:Transcriptional Activation
chemical_list: D000900:Anti-Bacterial Agents; D004251:DNA Transposable Elements; D004269:DNA, Bacterial; D048628:Ketolides; D018942:Macrolides; D002981:Clindamycin; D004917:Erythromycin; C106791:telithromycin