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High Rates of Intestinal Colonization With Extended-Spectrum Lactamase-Producing Enterobacteriaceae Among Healthy Individuals
  1. Eiman Mohammed Abdul Rahman, MD,
  2. Rasha Hamed El-Sherif, MD
  1. From the Department of Clinical Microbiology, Cairo University, Cairo, Egypt.
  1. Received August 23, 2011, and in revised form September 3, 2011.
  2. Accepted for publication September 18, 2011.
  3. Reprints: Eiman Mohammed Abdul Rahman, MD, Department of Clinical Pathology, Cairo University, Cairo, Egypt. E-mail: eimanmousa{at}yahoo.com.

Abstract

Background Infections caused by extended-spectrum β-lactamase (ESBL)–producing bacteria become an emerging problem in the community setting in many parts of the world.

Objective The objective of the study was to determine fecal carriage of ESBL-producing organisms in a community setting.

Methods A total of 632 fecal specimens from healthy individuals were screened for ESBL using the agar screening test with MacConkey agar plates supplemented with 1 μg/mL of cefotaxime for selection of ESBL-producing strains and confirmed by the Clinical Laboratory Standards Institute combined disk method.

Results Four hundred isolates (63.3%) were ESBL producers. Two hundred eighty-five isolates (71.25%) of them were Escherichia coli and 96 (24.0%) Klebsiella pneumoniae.

Conclusion We concluded that the community could be a reservoir of these ESBL-producing bacteria and enzymes.

Key Words
  • extended-spectrum β-lactamases
  • MacConkey selective agars

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