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  • Title: In vitro susceptibility to mecillinam of Escherichia coli strains isolated from the urine of pregnant women.
    Author: Duployez C, Loiez C, Cattoen C, Descamps D, Wallet F, Vachée A, Microbiologist Network from Nord-Pas-de-CalaisRéseau de microbiologistes du Nord-Pas-de-Calais, Nord-Pas-de-Calais, France..
    Journal: Med Mal Infect; 2016 Dec; 46(8):436-441. PubMed ID: 27609597.
    Abstract:
    OBJECTIVES: Pivmecillinam is a safe beta-lactam for use in pregnancy. It has been widely used for the treatment of lower urinary tract infections (UTIs) in the Nordic countries where its efficacy, minor impact on the microbiota, and low level of resistance among the Escherichia coli strains have been proven. However, susceptibility data related to E. coli involved in asymptomatic bacteriuria and lower UTIs in pregnant women is lacking. We aimed to support the 2015 recommendations issued by the French Infectious Diseases Society (SPILF) on gestational UTI, with a particular focus on pivmecillinam. MATERIAL AND METHODS: Antimicrobial susceptibility testing was performed by 12 hospitals with a maternity department on 235 E. coli strains isolated from the urine of pregnant women. Susceptibility to mecillinam was tested by disk diffusion method using the 2015 recommendations of the antibiogram committee of the French microbiology society (CA-SFM). RESULTS: Global susceptibility to mecillinam was 86.4%. Susceptibility to mecillinam was 96.5% for strains susceptible to amoxicillin-clavulanic acid and 38.7% for resistant strains. All six extended-spectrum beta-lactamase-producing E. coli strains were susceptible to mecillinam. CONCLUSION: Given the efficacy and safety of pivmecillinam during pregnancy, it may be used for the documented treatment of asymptomatic bacteriuria and acute cystitis in pregnant women. It also represents an alternative for the treatment of multidrug-resistant bacterial infections.
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