Empiric drug regimens listed for the various bacterial strains are for ADULT patients with normal renal function. Review the relevant package insert for additional prescribing information.


  • Large family of Gram-negative bacteria that includes many of the more familiar pathogens, such as Salmonella, Escherichia coli, Yersinia pestis, Klebsiella and Shigella, Proteus, Enterobacter, Serratia, and Citrobacter.
  • -Several are present in the human intestinal tract (normal part of the gut flora).
  • -Facultative anaerobes.  Most also reduce nitrate to nitrite.
  • -Many have multiple flagella (however, a few species are nonmotile).
  • -Non-spore forming.
  • -Variable catalase reactions among the species.
  • -Some strains produce highly toxic endotoxins

Enterobacteriaceae  (Gram Negative Bacilli)  
>Citrobacter species:
1] Citrobacter koseri
2] Citrobacter freundii
>Enterobacter species:
1] Enterobacter cloacae,
2] Enterobacter aerogenes)
>Escherichia coli
>Klebsiella species:
1] Klebsiella ozaenae
2] Klebsiella pneumoniae
3] Klebsiella rhinoscleromatis
>Morganella species
1] (Morganella morganii)
>Proteus species:
1] Proteus mirabilis
2] Proteus vulgaris
>Providencia species:
1] Providencia_rettgeri
2] Providencia stuartii
>Salmonella species:
1] Salmonella enteritidis
2] Salmonella typhi
3] Other
>Serratia marcescens
>Shigella species:
1] Shigella dysenteriae (serogroup A)
2] Shigella flexneri
3] Shigella boydii
4] Shigella sonnei
5] Other


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