Ampicillin resistance mediated by the R plasmid in strains of Shigella flexneri] |
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Authors: | MM Ramírez M Marrero RJ Monté JL Maestre L Bravo |
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Affiliation: | Instituto de Medicina Tropical Pedro Kouri. |
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Abstract: | Forty Shigella flexneri strains isolated from children attended to at the Children's Hospital of Camagüey during an outbreak of acute diarrheal disease were studied; the minimal inhibitory concentration of ampicillin was determined. 33 strains (82.5%) were resistant to higher concentrations: 8 to 16 micrograms/mL, and 7 were susceptible to 4 micrograms/mL concentrations. Resistance plasmid (R) extraction was carried out in all the isolated strains and a common plasmid was found this plasmid was purified and transferred to Escherichia coli HE 101. Resistance transmission was tested. |
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