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Human metapneumovirus infection among family members

Y Matsuzaki1, T Itagaki, T Ikeda

  • 1Department of Infectious Diseases, Yamagata University Faculty of Medicine, Iida-nishi 2-2-2, Yamagata, Japan. matuzaki@med.id.yamagata-u.ac.jp

Epidemiology and Infection
|August 10, 2012
PubMed

Insights

Human metapneumovirus (hMPV) spreads within families, often from school-aged children to younger siblings. Controlling school outbreaks is key to protecting infants from hMPV infection.

Area of Science:

  • Virology
  • Epidemiology
  • Public Health

Background:

  • Human metapneumovirus (hMPV) is a significant respiratory pathogen.
  • Understanding hMPV transmission dynamics within households is crucial for effective control strategies.
  • Limited data exists on the specific patterns of hMPV spread among family members.

Purpose of the Study:

  • To investigate the transmission patterns of hMPV within families.
  • To identify the primary sources and susceptible populations for hMPV infection in a household setting.
  • To determine the role of school-aged children in the domestic spread of hMPV.

Main Methods:

  • Retrospective analysis of 15 families with confirmed hMPV infections between 2008 and 2010.
  • Diagnosis of hMPV using real-time PCR.
  • Age distribution analysis of index and contact patients.
  • Estimation of the serial interval between symptom onset in index and contact patients.

Main Results:

  • Index cases were predominantly school-aged children (median age 5 years).
  • Contact patients were significantly younger than index patients, with a notable proportion being infants cared for at home (58%).
  • The estimated serial interval for hMPV transmission within families was 5 days.

Conclusions:

  • School-aged children attending educational facilities are important vectors for hMPV transmission into households.
  • Infants cared for at home are a vulnerable population susceptible to hMPV infection originating from older siblings.
  • Interventions targeting school-based hMPV outbreaks may be effective in preventing infant infections.

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