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First Case of Ewingella americana Meningitis in a Term Newborn: A Rare but Real Pathogen
Sarah Meisler1, Ranjith Kamity2,3, Asif Noor3,4
1Department of Pediatrics, NYU Winthrop Hospital, Mineola, NY, United States.
Abstract:
Ewingella americana is a Gram-negative, catalase positive and anaerobic enterobacterium first described in 1983. Infections caused by this pathogen, such as bacteremia and pneumonia, are extremely rare and primarily occur in patients with underlying pathologies or immunosuppression. There is still a debate as to whether Ewingella americana is a real pathogen or if it can be considered an opportunistic infectious agent. We report the first documented case of Ewingella americana meningitis in literature and the first case of this pathogen causing infection in a newborn. Case presentation: A term newborn male was born via spontaneous vaginal delivery to a Gravida 2 Para 0, 28 year old woman with negative prenatal screening tests with a birth weight of 4.70 kilograms and Apgar scores of 9 and 9 at 1 and 5 minutes respectively. Rupture of membranes was 27 hours prior to delivery. Infant was noted to be febrile to 101°F at birth, so infant was admitted in the neonatal intensive care unit and started empirically on ampicillin and gentamycin. Cerebrospinal fluid (CSF) drawn due to irritability on day of life 1 presented normal cell and protein count but grew Gram negative rods after 2 days, identified subsequently as Ewingella americana; repeat CSF analysis done at 6 days of life showed pleocytosis. Brain MRI performed at 2 weeks of life showed leptomeningitis. The infant was treated with ceftazidime for 21 days from the first negative CSF culture. He has since followed up with the neurologist and infectious disease specialist. He had a normal electroencephalogram (EEG) and is meeting all developmental milestones at the 24 months of age follow up visit. Conclusion: Our case highlights that Ewingella americana can cause serious invasive infections such as meningitis in the neonatal period with minimal symptomatology. Antibiotic treatment in the neonatal period can present challenges due to the Ewingella americana's variable sensitivity. The role of these emerging low virulence organisms in causing infections has to be further elucidated, especially in vulnerable patients such as newborns.
Insights
This case report details the first newborn meningitis caused by Ewingella americana, a rare Gram-negative bacterium. Despite minimal symptoms, this pathogen can lead to serious invasive infections in neonates.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Neonatology
Background:
- Ewingella americana, a Gram-negative enterobacterium, is rarely associated with human infections.
- Its role as a pathogen versus an opportunistic agent remains debated.
- Infections typically occur in immunocompromised individuals or those with comorbidities.
Observation:
- A term newborn presented with fever and irritability shortly after birth.
- Cerebrospinal fluid analysis revealed Gram-negative rods identified as Ewingella americana.
- The infant was diagnosed with leptomeningitis and treated successfully.
Findings:
- This is the first reported case of Ewingella americana meningitis in a newborn.
- The case demonstrates the potential for this bacterium to cause severe invasive disease in neonates.
- Variable antibiotic sensitivity of Ewingella americana poses treatment challenges.
Implications:
- Ewingella americana can cause serious invasive infections, including meningitis, in neonates.
- Further research is needed to understand the role of low-virulence organisms in vulnerable populations.
- Early diagnosis and appropriate antibiotic therapy are crucial for managing neonatal infections.
Related Concept Videos
Bacterial Meningitis
Atypical Pneumonia
Bacterial Gastroenteritis
Viral Meningitis
Bacterial Meningitis I: Introduction
Bacterial Meningitis II: Pathophysiology

