Human metapneumovirus reinfection among children in Thailand determined by ELISA using purified soluble fusion protein
Department of Medicine, Division of Infectious Diseases and Immunology; Center for Infectious Disease and Vaccine Research
Immunity | Immunology and Infectious Disease | Immunology of Infectious Disease | Infectious Disease
BACKGROUND: Human metapneumovirus (hMPV) is a newly discovered paramyxovirus that causes acute respiratory illness. Despite apparent near-universal exposure during early childhood, immunity is transient.
METHODS: An indirect screening enzyme-linked immunosorbent assay using a recombinant soluble fusion (F) glycoprotein derived from hMPV was used to test for anti-F IgG in 1,380 pairs of acute- and convalescent-stage serum samples collected from children in Kamphaeng Phet, Thailand.
RESULTS: Of the 1,380 serum sample pairs tested, 1,376 (99.7%) showed evidence of prior infection with hMPV. Sixty-six paired specimens demonstrated a > or=4-fold rise in titer, for an overall reinfection rate of 4.9%. Two children demonstrated evidence of an initial infection. Forty-eight of the 68 new infections or reinfections occurred in 2000, accounting for 13.2% of all nonflaviviral febrile illnesses in the study population in that year. Of 68 positive cases, 85.3% complained of cough and 66.2% complained of rhinorrhea, compared with 61.4% and 49.0% of negative cases, respectively (P < .01). All positive samples were also tested for an increase in titer of antibodies to respiratory syncytial virus F, and 27% exhibited a > or=4-fold rise.
CONCLUSION: These results demonstrate that hMPV reinfections cause illness at a rate equal to that seen for initial infections. hMPV may have a more significant impact in older children than previously realized and may be the cause of significant outbreaks in this population.
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Citation: J Infect Dis. 2008 Sep 15;198(6):836-42. doi: 10.1086/591186. Link to article on publisher's site
The Journal of infectious diseases
Pavlin, Julie A.; Hickey, Andrew C.; Ulbrandt, Nancy; Chan, Yee-Peng; Endy, Timothy P.; Boukhvalova, Marina S.; Chunsuttiwat, Supamit; Nisalak, Ananda; Libraty, Daniel H.; Green, Sharone; Rothman, Alan L.; Ennis, Francis A.; Jarman, Richard; Gibbons, Robert V.; and Broder, Christopher C., "Human metapneumovirus reinfection among children in Thailand determined by ELISA using purified soluble fusion protein" (2008). Infectious Diseases and Immunology Publications and Presentations. 247.