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  • Title: Characterization of the Tn916-like transposon Tn3872 in a strain of abiotrophia defectiva (Streptococcus defectivus) causing sequential episodes of endocarditis in a child.
    Author: Poyart C, Quesne G, Acar P, Berche P, Trieu-Cuot P.
    Journal: Antimicrob Agents Chemother; 2000 Mar; 44(3):790-3. PubMed ID: 10681362.
    Abstract:
    Clinical blood isolates from three sequential episodes of endocarditis occurring over a 6-month period in a child with a malformative cardiopathy were investigated. All isolates identified as Abiotrophia defectiva were resistant to erythromycin-clindamycin and to tetracycline-minocycline, due to the presence of sequences homologous to the erythromycin resistance gene ermB and to the tetracycline resistance gene tet(M), respectively. These resistance genes were located on a chromosomally borne composite Tn916-related transposon. These results demonstrate the involvement of conjugative transposons in the dissemination of antibiotic resistance in the genus Abiotrophia.
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