• IMA sites
    • IMAJ services
    • IMA journals
    • Follow us
    • Alternate Text Alternate Text
    עמוד בית
    Fri, 22.11.24

    Search results

    October 2011
    D.S. Shouval, Z. Samra, I. Shalit, G. Livni, E. Bilvasky, O. Ofir, R. Gadba and J. Amir
    605-608 Abstract Full article

    Background: Staphylococcus aureus infection is a major cause of morbidity and mortality worldwide. Clindamycin is widely used in the treatment of staphylococcal infections; however, it is our impression that in the last few years, inducible clindamycin resistance (ICR) has become more prevalent.

    Objective: To assess the prevalence of ICR[1] in methicillin-sensitive Staphylococcus aureus (MSSA) infections among pediatric patients in Israel.

    Methods: We reviewed the files of children diagnosed with MSSA[2] infections during the period January 2006 to June 2007 for full antibiogram (including the D-test for ICR), phage typing and randomly amplified polymorphic DNA.

    Results: Altogether, 240 MSSA isolates were recovered, mainly from wounds and abscesses. ICR was detected in 62 of 68 erythromycin-resistant/clindamycin-sensitive strains (91%); the ICR rate for the total number of isolates was 26% (62/240). Phage type analysis demonstrated that 38 of 61 ICR isolates

    (62%) were sensitive to group 2, compared to 42 of 172 isolates (24%) that did not express ICR (P < 0.01). On randomly amplified polymorphic DNA, phage type 2 isolates expressing ICR belonged to the same clone, which was different from ICR isolates sensitive to other phages and from isolates not expressing ICR.

    Conclusions: Inducible clindamycin resistance is common among methicillin-sensitive Staphylococcus aureus in Israeli children. The D-test should be performed routinely in all isolates of MSSA.





    [1] ICR = inducible clindamycin resistance



    [2] MSSA = methicillin-sensitive Staphylococcus aureus



     
    May 2005
    J. Bishara, G. Livne, S. Ashkenazi, I. Levy, S. Pitlik, O. Ofir, B. Lev and Z. Samra
    298-301 Abstract Full article

    Background: The prevalence of extended-spectrum β-lactamase-producing organisms and their antimicrobial resistance patterns may vary between geographic areas.

    Objectives: To evaluate the prevalence and susceptibility of ESBL[1]-producing organisms among Klebsiella pneumoniae and Escherichia coli isolated from adult and pediatric patients in two Israeli hospitals.

    Methods: ESBL production was tested according to recommendations of the Clinical and Laboratory Standards Institute, using ceftazidime (30 μg) and a combination of ceftazidime/clavulanate (30/10 μg) disks with a ≥5 mm difference indicating positivity. Antibiotic susceptibilities were determined by the disk diffusion method according to CLSI[2] standards. Minimum inhibitory concentrations were determined by the E-test.

    Results: The prevalence of ESBL-producing organisms was significantly higher among K. pneumoniae than E. coli isolates – 32% (241/765) vs. 10% (57/547) respectively (P < 0.001), and more frequently isolated from adults than children (odds ratio 2.27 for K. pneumoniae and 12.94 for E. coli). Resistance rates for amoxicillin/clavulanate, piperacillin-tazobactam, amikacin, and ciprofloxacin among the ESBL-producing K. pneumoniae and E. coli isolates were 95%, 82%, 49% and 77% for K. pneumoniae, and 77%, 35%, 25% and 100% for E. coli. Two (0.8%) ESBL-producing and 4 (0.7%) ESBL-negative K. pneumoniae isolates showed intermediate susceptibility (MIC[3] 6 μg/ml) to meropenem. All isolates were sensitive to ertapenem and colistin.  

    Conclusion: ESBL production among K. pneumoniae and E. coli is more prevalent in the adult population than the pediatric population and is associated with multidrug resistance.






    [1] ESBL = extended spectrum β-lactamase

    [2] CLSI = Clinical and Laboratory Standards Institute (formerly the NCCLS)

    [3] MIC = minimum inhibitory concentration





     

    About Imaj About Imaj Editorial Board
    Online Tools Submit a Manuscript Subscribing to IMAJ
    Contact Us Imaj Editorial 03-6100418 Fax 03-7519673 Service Center 03-6100471 Contact us by Online Form
    About IMA What is the Israeli Medical Association? IMA Site IMA Historical Background The IMA Vision
    Legal Disclaimer: The information contained in this website is provided for informational purposes only, and should not be construed as legal or medical advice on any matter.
    The IMA is not responsible for and expressly disclaims liability for damages of any kind arising from the use of or reliance on information contained within the site.
    © All rights to information on this site are reserved and are the property of the Israeli Medical Association. Privacy policy

    2 Twin Towers, 35 Jabotinsky, POB 4292, Ramat Gan 5251108 Israel
    SLATECH - פיתוח אתרי אינטרנט ופורטלים ארגוניים המערכת פותחה על ידי חברת