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Unformatted text preview: Causative agent: Respiratory syncytial virus Category: Virus Group: Group V ((-)ssRNA) Order: Mononegavirales Family: Paramyxoviridae Genus: Pneumovirus Species: Human respiratory syncytial virus T he name of the virus is derived from its characteristic of causing cell fusion when grown in cell culture.RSV is one of the most important causes of lower respiratory illness (including bronchitis and pneumonia) in infants and young children and can be fatal. In adults, RSV causes mild upper respiratory illness, but it is also classified as a paramyxovirus. Biologically and behaviorally, it resembles influenza and parainfluenza viruses more than other taxonaomic virus groups, but is serologically and in several ways biologically distinct from them. Only one clinically important type has been recognized. Disease: elderly people and those with underlying pulmonary disease may be quite susceptible to infection with RSV. RSV is associated with a sharp annual outbreak of acute respiratory disease occurring in late autumn or in winter. It increases morbidity and mortality from bronchitis and neumonia. Reinfection occurs with illness. ~70% of persons have serum antibody by age 5, but infections continue to occur in bronchitis and neumonia....
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