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Published on: March 28, 2015
An outbreak of enterovirus 71 in a nursery
Fang-Liang Huang1, Chao-Huei Chen, Shui-King Huang
1Department of Paediatrics, Taichung Veterans General Hospital, Taichung, Taiwan.
Insights
A rare hospital-acquired enterovirus 71 (EV71) outbreak occurred in a newborn nursery. EV71 infection in infants presents with poor activity, fever, and drowsiness, making early diagnosis challenging.
Area of Science:
- Virology
- Infectious Diseases
- Neonatal Care
Background:
- Enterovirus 71 (EV71) is a common cause of hand, foot, and mouth disease and herpangina.
- Nosocomial outbreaks of EV71 are infrequent, especially in neonatal settings.
Observation:
- A nosocomial outbreak of EV71 affected 37% of infants in a newborn nursery.
- Clinical symptoms included poor activity, fever, drowsiness, diarrhea, and oral ulcers.
- Four infants developed encephalitis; no deaths were reported.
Findings:
- EV71 was confirmed by isolation and reverse transcription polymerase chain reaction (RT-PCR).
- Sequence analysis showed high nucleotide similarity (98.6-100%) among the EV71 strains.
- Clinical presentation alone is insufficient for diagnosing EV71 in neonates.
Implications:
- Strict hygiene protocols, including hand washing and disinfection, are crucial for controlling EV71 spread in nurseries.
- Early recognition and isolation of potential cases are vital to prevent nursery-wide outbreaks.
- This study highlights the challenges in diagnosing EV71 in neonates and emphasizes the need for molecular confirmation.
Abstract:
In this article we report a nosocomial outbreak of enterovirus 71 (EV71) in a newborn nursery and describe the clinical presentations of infected infants. Community outbreaks of EV71 are quite common in epidemic areas, but a nosocomial outbreak of EV71 is a rare occurrence. A total of 7 out of 19 infants (37%) had symptoms. All infants had poor activity, 6 (86%) had fever, 4 (57%) had drowsiness, 3 (43%) had diarrhoea, and 2 (29%) had oral ulcers. Four infants (57%) suffered from encephalitis. There were no deaths. EV71 was isolated from 3 (43%) of the young infants, while all were positive when tested for EV71 using a reverse transcription polymerase chain reaction. A sequence analysis of the EV71 partial gene revealed a 98.6-100% nucleotide similarity. Control measures included staff hand washing, disinfecting all materials exposed to potentially infected biological fluid, increasing staff hygiene precautions in the kitchen, and using a different basin for bathing each baby. We conclude that it is difficult to diagnose EV71 infection in young infants by clinical presentation alone and, similar to other enteroviruses, EV71 can spread efficiently amongst young infants in a nursery unit.
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