Abstract:

Objective To investigate the epidemiological characteristics of respiratory tract viruses among adult patients in Beijing. Methods Nasopharyngeal swabs were collected from outpatients and inpatients with acute respiratory tract infections in Beijing Hospital from April 2014 to March 2015. Liquid chip （xTAG RVP） was applied to detect 9 types of respiratory tract viruses（18 subtypes）,and all results were statistically analyzed. Results A total of 191 samples were collected to monitor 9 types of viruses,86 samples were positive,and the positive rate was 45.0%. The positive rates from high to low were as follows：influenza A virus（FluA,26.7% ,51/191）, influenza B virus（FluB,6.8%,13/191）,enterovirus/rhinovirus（E/R,3.7%,7/191）,coronaviridae（Cor,2.6%,5/191）,respiratory syncytial virus（RSV,2.1%,4/191）,human metapneumovirus（hMPV,2.1%,4/191） and parainfluenza virus（PIV,1.0%,2/191）. Adenovirus（AdV） and human bocavirus（HBoV） were not detected. There was no statistical significance for positive rates between inpatient and outpatient groups, female and male groups（P>0.05）. The positive rate of respiratory tract viruses in patients ≤60 years old was significantly higher than that in patients >60 years old（χ²=12.264,P<0.05）. The positive rate of viruses had monthly variation,and it was the highest in January accounting for 45.3%. Conclusions In Beijing,the positive rate of respiratory tract viruses reaches the highest in patients ≤60 years old and in January. FluA and FluB are main pathogens.

Key words: Viruses, Respiratory tract infections, Adults, Epidemiology, Beijing