Appearance of amikacin and tobramycin resistance due to 4'-aminoglycoside nucleotidyltransferase [ANT(4')-II] in gram-negative pathogens
| Autor: | H Hächler, George A. Jacoby, G H Miller, R S Hare, M J Blaser, F H Kayser, P Santanam |
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| Rok vydání: | 1990 |
| Předmět: |
Dibekacin
DNA Recombinant Biology Microbiology Intensive care Gram-Negative Bacteria Escherichia coli medicine Tobramycin Pharmacology (medical) Amikacin Bacteriophage Typing Pharmacology Pyocins Aminoglycoside Nucleic Acid Hybridization Drug Resistance Microbial biochemical phenomena metabolism and nutrition Nucleotidyltransferases Virology Anti-Bacterial Agents Culture Media carbohydrates (lipids) Klebsiella pneumoniae Infectious Diseases Pseudomonas aeruginosa Sisomicin Netilmicin Isepamicin Research Article Plasmids medicine.drug |
| Zdroj: | Antimicrobial Agents and Chemotherapy. 34:2381-2386 |
| ISSN: | 1098-6596 0066-4804 |
| DOI: | 10.1128/aac.34.12.2381 |
| Popis: | Following the use of amikacin as the principal aminoglycoside at a Denver hospital, amikacin resistance appeared first in Pseudomonas aeruginosa and then in Escherichia coli, Klebsiella pneumoniae, and other enteric organisms from debilitated and compromised patients who had spent time in intensive care units and who had been treated with multiple antibiotics, usually including amikacin. In a P. aeruginosa isolate, resistance to amikacin and tobramycin was transferable by the IncP-2 plasmid pMG77, while in E. coli and K. pneumoniae resistance was carried by the transmissible plasmids pMG220, pMG221, and pMG222 belonging to the IncM group. Isolates and transconjugants produced an enzyme with adenyltransferase activity with substrates having a 4'-hydroxyl group, such as amikacin, kanamycin, neomycin, Sch 21768, isepamicin (Sch 21420), or tobramycin, but not with aminoglycosides lacking this target, such as dibekacin, netilmicin, sisomicin, or gentamicin C components. Genes encoding the 4'-aminoglycoside nucleotidyltransferase [ANT(4')] activity were cloned from pMG77, pMG221, and pMG222. A DNA probe prepared from the ANT(4') found in P. aeruginosa hybridized with the ANT(4') determinant found in E. coli. A probe for the ANT(4') from Staphylococcal spp., which differs in its modification of substrates, like dibekacin, that have a 4"- but not a 4'-hydroxyl group, failed to hybridize with the gram-negative ANT(4') determinant, which consequently has been termed ANT(4')-II. |
| Databáze: | OpenAIRE |
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