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Urine Isolates

CATHOLIC HEALTH SYSTEM  ANTIBIOGRAM

All Inpatients

March 1, 2012 - March 1, 2013

General Notes:                        

  • Data were obtained from Biomerieux Vitek 2 System or disk diffusion testing according to Clinical and Laboratory Standards Institute (CLSI) guidelines.
  • Repeated isolates from the same patient were excluded.
  • Organisms that appear in red - Statistical validity of estimates of percent susceptibility for organisms for which there are fewer than 30 isolates reported is limited. Please take this into consideration when interpreting the reported results.
  • Some organisms for which there were only very small numbers have been excluded from this report.
  • Rifampin should not be used alone for antimicrobial therapy.
  • Susceptibility and resistance to azithromycin, clarithromycin and dirithromycin can be predicted from the erythromycin result.
  • Organisms that are susceptible to tetracycline are also considered susceptible to doxycycline and minocycline.                       

Organism-Specific Notes:                        

  • Staphylococci: Susceptibility to amoxicillin/clavulanic acid and ampiciliin/sulbactam can be deduced from oxacillin testing results.  If oxacillin is susceptible, amoxicillin/clavulanic acid and ampicillin/sulbactam will be reported as susceptible.
  • Staphylococci: Amoxicillin without clavulanic acid should not be used to treat any staphylococcus infection.
  • Enterococci: Susceptibility to amoxicillin/clavulanic acid and ampiciliin/sulbactam can be deduced from penicillin testing results.  If penicillin is susceptible, amoxicillin/clavulanic acid and ampicillin/sulbactam will be reported as susceptible.
  • Viridans Streptococci:  Please note that only a small proportion of those isolated and reported were tested for susceptibilities.  Please take this into consideration  when interpreting results.
  • For some organism/antimicrobial agent combinations, the absence or rare occurrence of resistant strains precludes defining any results category other than susceptible:
    • Linezolid: Enterococcus species, Staphylococcus species, Streptococcus agalactiae, Streptococcus pneumoniae
    • Ertapenem: E coli, K pneumoniae, C freundii, C koseri, E aerogenes, E cloacae, K oxytoca (excluding ESBLbproducing strains), M morgannii, P mirabilis, P vulgaris, S marcesens

Year-Specific Notes:                         

  • Susceptibility testing of levofloxacin against gram negative bacilli was added November 2012. Results are not listed if the number of isolates tested against levofloxacin was less than 30 or, for the isolates listed in red, less than the number of isolates reported.                       
  • Susceptibility testing of pipercillin/tazobactam against gram negative bacilli (other than of P. aeruginosa) was added November 2012. Results are not listed if the number of isolates tested against piperacillin/tazobactam was less than 30 or, for the isolates listed in red, less than the number reported.                       
  • Susceptibility testing of Imipenem against Proteus species, Providencia species and Morganella morganii was added November 2012. Results are not listed if  the  number of isolates tested against imipenem was less than 30 or, for the isolates listed in red, less than the number reported.                       

                        
Prepared by Catholic Health Department of Laboratories Microbiology Laboratory, 4/9/2013 

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