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Non-Invasive Model of Neuropathogenic Escherichia coli Infection in the Neonatal Rat
Published on: October 29, 2014
Enterobacter cloacae: an "ICU bug" causing community acquired necrotizing meningo-encephalitis
Nitin Maheshwari1, Alison Shefler
1Paediatrics, John Radcliffe Hospital, Oxford, UK. nitin023@rediffmail.com
Abstract:
Enterobacter cloacae is a gram negative bacillus that is ubiquitous as a contaminant and a pathogen in adult, paediatric, and neonatal ICUs. Its transmission is almost exclusively nosocomial with community acquired infection reported rarely. We report a case of community acquired, rapidly progressive E. cloacae meningo-encephalitis in a neonate. A three-week-old term infant presented from home, having been discharged from hospital within two days of delivery. She rapidly progressed to multi-organ dysfunction. Initial CT of her brain showed evidence of severe hypoxic changes and herniation of the frontal lobes through the anterior fontanelle. Care was withdrawn 72 hours after admission. Post mortem examination confirmed E.cloacae meningo-encephalitis as a cause of her death. The baby had not been in a critical care environment at any time before admission, making it highly likely to have been a community acquired infection. Transmission of the organism may have been vertical as maternal transmission with intestinal colonization of neonates with E. cloacae has previously been reported. This case confirms that infection with E. cloacae should be included in the differential diagnosis of any severely ill neonate presenting from the community, and antimicrobial therapy should be optimized accordingly.
Insights
A rare case of community-acquired Enterobacter cloacae meningo-encephalitis rapidly affected a neonate. This highlights the need to consider E. cloacae in severely ill infants presenting from the community.
Area of Science:
- Neonatal Medicine
- Infectious Diseases
- Microbiology
Background:
- Enterobacter cloacae is a common nosocomial pathogen in neonatal intensive care units (NICUs).
- Community-acquired infections with E. cloacae are rare, especially invasive forms like meningo-encephalitis.
Observation:
- A three-week-old neonate presented with a rapidly progressive, severe illness after hospital discharge.
- Clinical presentation included multi-organ dysfunction and CT findings of severe hypoxic brain injury and herniation.
- Post-mortem examination confirmed E. cloacae meningo-encephalitis as the cause of death.
Findings:
- The neonate had no prior critical care exposure, indicating a community-acquired infection.
- Vertical transmission from mother to neonate is a potential route, given prior reports of intestinal colonization.
- This case represents a rare instance of severe, community-acquired E. cloacae meningo-encephalitis in an infant.
Implications:
- E. cloacae should be considered in the differential diagnosis for neonates presenting with severe illness from the community.
- Prompt and appropriate antimicrobial therapy is crucial for optimizing outcomes in suspected E. cloacae infections.
- Further investigation into non-nosocomial transmission routes of E. cloacae in neonates is warranted.
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