Etiological classification of virus in adult community-acquired pneumonia in Yantai

To employ multiplex polymerase chain reaction (PCR) to classify the types of virus in 128 patients of community-acquired pneumonia and analyze the relationship between type of virus, age and seasons. The positive rate of viral pneumonia was 34.4% (44/128). In 44 virus positive patients, the rates of influenza A virus, rhinovirus, adenovirus, parainfluenza type 1, human metapneumovirus virus, influenza B virus, parainfluenza type 2, parainfluenza type 3 and enterovirus were 22.7%(10/44), 15.9%(7/44), 15.9%(7/44), 9.1%(4/44), 9.1%(4/44)6.8%(3/44), 2.3%(1/44), 2.3%(1/44) and 2.3%(1/44)respectively. And other 6(13.6%) patients were at least infected by one virus. The viral pneumonia had a high positive rate in spring and winter. And the age group of 20 to 29 years had a high positive rate. The major pathogen contributing to adult community-acquired pneumonia in Yantai were influenza A virus, rhinovirus and adenovirus. Key words: Community-acquired infections; Noxae