[Human rhinovirus detection from infants and young children with acute respiratory infections by nested-polymerase chain reaction].

OBJECTIVE

To develop a rapid, sensitive and specific method for detection human rhinovirus (HRV) from clinical specimens.

METHODS

Primers derived from the highly conserved 5'noncoding region of human rhinovirus were used to develop a nested RT-PCR for detecting HRV. The sensitivity and specificity of the RT-PCR were determined using various RNA while DNA viruses were used as control. Seven hundred and seventy-one specimens collected from children with symptoms of acute respiratory infections from Nov. 2002 to Oct. 2003 were analyzed for HRV by RT-PCR as well as for other respiratory viruses through isolation of virus and indirect immunofluorescent assay.

RESULTS

Only the cDNA from HRV was positive by RT-PCR, indicating the nested RT-PCR was specific. With RT-PCR, HRV were detected in 148 out of 771 specimens (19.2%). As for HRV positive rates, it was found 53.3% in pharyngitis patients; 43.8% in laryngitis patients and 28.7% in bronchitis patients. In Sep. 2002 and from Aug. 2003 to Oct. 2003, HRV positive rates were high (21.6% - 32.6%), with Sep. 2003 in particular--32.6%. From Mar. 2003 to Jul. 2003, HRV positive rates maintained from 16.0% to 19.1%.

CONCLUSION

HRV was one of the important agents for acute respiratory infections in infants and young children in Beijing.