The 17-year observation of changes in the etiological pattern of acute respiratory diseases (ARD) in the country has demonstrated that different types of adenoviruses are prevalent in the circulation on the whole territory. Adenoviral infection was found to prevail among non-influenza infections in the Ukraine, RSV infection in the north of the Russian Federation and in the Far East; piconaviral infections caused by Echo and Coxsackievirus B in the Urals and Byelarus Republic. However, some years were marked by a change in various serotypes of adenoviruses and picornaviruses in different climatic and geographical zones and in different age population groups. There was a seasonal variability in the spread of respiratory viruses and herpes simplex virus type I. Adenovirus infection is characterized by fall-winter-spring seasonal patterns. RSV-infection and herpes infection are characterized by fall-winter seasonal patterns. In contrast, the acute respiratory infections of picornavirus etiology show a well-defined summer seasonal pattern.
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