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Seasonality, incidence, and repeat human metapneumovirus lower respiratory tract infections in an area with a high prevalence of human immunodeficiency virus type-1 infection. 2007

Shabir A Madhi, and Herbert Ludewick, and Locadiah Kuwanda, and Nadia van Niekerk, and Clare Cutland, and Keith P Klugman
University of the Witwatersrand/Medical Research Council, Respiratory and Meningeal Pathogens Research Unit, Chris Hani-Baragwanath Hospital, Bertsham, South Africa. madhis@hivsa.com

BACKGROUND There is limited information regarding the epidemiology of human metapneumovirus (hMPV) from Africa, despite it being identified as a common pathogen in children with pneumonia. OBJECTIVE Determine the epidemiology of severe hMPV-associated lower respiratory tract infection (LRTI) in human immunodeficiency virus type-1 (HIV) infected and uninfected children. METHODS Nasopharyngeal aspirate samples from children hospitalized for LRTI between January 2000 and December 2002 were analyzed for common respiratory viruses using an immunofluorescence assay; and 2715 available nasopharyngeal aspirate samples were tested for hMPV by reverse-transcriptase polymerase chain reaction targeting its fusion protein. Phylogenetic analysis of the fusion (F) gene was performed on samples associated with repeat hMPV infections in the same child. RESULTS hMPV was identified perennially and was the second most commonly identified respiratory virus (11.3% versus 21.1% for respiratory syncytial virus, P < 0.0001) in HIV-uninfected children. The burden of hospitalization for hMPV-LRTI was 5.4 (95% CI: 3.5-7.5) fold greater in HIV-infected (2935 per 100,000) compared with HIV-uninfected children [575 (95% CI: 472-695) per 100,000]. HIV-infected children had greater evidence of bacterial coinfection and a higher mortality rate than did uninfected children. Repeat hMPV associated hospitalizations involved homologous (B2 subgroup) and heterologous (A1 and B2) hMPV. CONCLUSIONS There is a high burden of hMPV-LRTI and repeat severe infections occur from homologous and heterologous subgroups of the virus.

UI MeSH Term Description Entries
D007223 Infant A child between 1 and 23 months of age. Infants
D008297 Male Males
D009305 Nasopharynx The top portion of the pharynx situated posterior to the nose and superior to the SOFT PALATE. The nasopharynx is the posterior extension of the nasal cavities and has a respiratory function. Rhinopharynx,Choanae,Nasopharynges,Nasopharynxes,Rhinopharynges,Rhinopharynxes
D010802 Phylogeny The relationships of groups of organisms as reflected by their genetic makeup. Community Phylogenetics,Molecular Phylogenetics,Phylogenetic Analyses,Phylogenetic Analysis,Phylogenetic Clustering,Phylogenetic Comparative Analysis,Phylogenetic Comparative Methods,Phylogenetic Distance,Phylogenetic Generalized Least Squares,Phylogenetic Groups,Phylogenetic Incongruence,Phylogenetic Inference,Phylogenetic Networks,Phylogenetic Reconstruction,Phylogenetic Relatedness,Phylogenetic Relationships,Phylogenetic Signal,Phylogenetic Structure,Phylogenetic Tree,Phylogenetic Trees,Phylogenomics,Analyse, Phylogenetic,Analysis, Phylogenetic,Analysis, Phylogenetic Comparative,Clustering, Phylogenetic,Community Phylogenetic,Comparative Analysis, Phylogenetic,Comparative Method, Phylogenetic,Distance, Phylogenetic,Group, Phylogenetic,Incongruence, Phylogenetic,Inference, Phylogenetic,Method, Phylogenetic Comparative,Molecular Phylogenetic,Network, Phylogenetic,Phylogenetic Analyse,Phylogenetic Clusterings,Phylogenetic Comparative Analyses,Phylogenetic Comparative Method,Phylogenetic Distances,Phylogenetic Group,Phylogenetic Incongruences,Phylogenetic Inferences,Phylogenetic Network,Phylogenetic Reconstructions,Phylogenetic Relatednesses,Phylogenetic Relationship,Phylogenetic Signals,Phylogenetic Structures,Phylogenetic, Community,Phylogenetic, Molecular,Phylogenies,Phylogenomic,Reconstruction, Phylogenetic,Relatedness, Phylogenetic,Relationship, Phylogenetic,Signal, Phylogenetic,Structure, Phylogenetic,Tree, Phylogenetic
D011014 Pneumonia Infection of the lung often accompanied by inflammation. Experimental Lung Inflammation,Lobar Pneumonia,Lung Inflammation,Pneumonia, Lobar,Pneumonitis,Pulmonary Inflammation,Experimental Lung Inflammations,Inflammation, Experimental Lung,Inflammation, Lung,Inflammation, Pulmonary,Inflammations, Lung,Inflammations, Pulmonary,Lobar Pneumonias,Lung Inflammation, Experimental,Lung Inflammations,Lung Inflammations, Experimental,Pneumonias,Pneumonias, Lobar,Pneumonitides,Pulmonary Inflammations
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D005260 Female Females
D005838 Genotype The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS. Genogroup,Genogroups,Genotypes
D006760 Hospitalization The confinement of a patient in a hospital. Hospitalizations
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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