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Published on: February 23, 2014
[Human metapneumovirus--occurrence and clinical significance]
Kari Ravndal Risnes1, Andreas Radtke, Svein Arne Nordbø
1Avdeling for barn og ungdom, St. Olavs Hospital, HF 7006 Trondheim. kari.risnes@stolav.no
Background:
Human metapneumovirus (hMPV) was isolated for the first time in 2001 from young children with acute respiratory tract infection.
Materials And Methods:
Review of published data on the clinical impact of hMPV and our own experience with hMPV during three winter seasons. We present four cases of severe hMPV childhood infections.
Results:
Human metapneumovirus accounts for approximately 10% of respiratory tract infections that are not related to previously known etiologic agents. The virus seems to be distributed worldwide and to have a seasonal distribution. During a short epidemic, 60% of our isolates from children with respiratory infection tested positive for hMPV. Serologic studies have shown that by the age of five, virtually all children have been exposed to the virus and reinfections appear to be common. Human metapneumovirus may cause mild respiratory tract infection. Small children, elderly and immunocompromised individuals are, however, at risk of severe disease and hospitalization. Although the clinical manifestations of hMPV resemble those of respiratory syncytial virus, we have observed that hMPV more often causes severe pneumonia in hospitalized children.
Interpretation:
Human metapneumovirus is an important cause of acute respiratory tract infection in children. The virus may cause severe disease in patients at risk. We recommend identification and isolation of hospitalized hMPV-infected patients.
Insights
Human metapneumovirus (hMPV) causes about 10% of respiratory infections in children and can lead to severe illness, especially in young, elderly, or immunocompromised individuals. Early identification and isolation of hospitalized hMPV patients are recommended.
Area of Science:
- Virology
- Pediatric Respiratory Infections
Background:
- Human metapneumovirus (hMPV) was first identified in 2001.
- hMPV is a significant cause of acute respiratory tract infections in children.
Observation:
- hMPV accounts for approximately 10% of respiratory infections not attributed to other known agents.
- The virus exhibits worldwide distribution and seasonal patterns, with high prevalence during epidemics.
- Nearly all children are exposed to hMPV by age five, with common reinfections.
Findings:
- hMPV infections can range from mild to severe, particularly in vulnerable populations.
- Hospitalized children with hMPV are at risk for severe pneumonia, more so than with RSV.
- Severe disease is noted in young children, the elderly, and immunocompromised individuals.
Implications:
- hMPV is an important pathogen in pediatric respiratory illness.
- Prompt diagnosis and isolation of hospitalized hMPV patients are crucial for infection control.
- Understanding hMPV's clinical impact is vital for managing respiratory infections in at-risk groups.
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