Human rhinovirus infection in children with acute lower respiratory tract infections
10.3760/cma.j.issn.1000-6680.2015.10.003
- VernacularTitle:奚志敏钟华清沈军王立波
- Author:
Zhimin XI
;
Huaqing ZHONG
;
Jun SHEN
;
Libo WANG
- Publication Type:Journal Article
- Keywords:
Rhinovirus;
Child;
Acute lower respirtory infections;
Bronchoalveolar lavage fluid
- From:
Chinese Journal of Infectious Diseases
2015;(10):599-603
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the clinical and molecular epidemiologic features of human rhinovirus (HRV) in children with acute lower respiratory tract infection (ALRTI) in Shanghai by detecting HRV from bronchoalveolar lavage fluid (BALF) .Methods One hundred and thirty-five BALF samples were collected from children with ALRTI at Children′s Hospital of Fudan University from January to June in 2014 . The specimens were tested by one-step real-time reversible transcription (RT )-polymerase chain reaction (PCR) for HRV .Gene fragments of VP4/VP2 capsid protein of the HRV genome were amplified and sequenced .The phylogenetic trees of HRV strains were drawn .Chi-square test was used for statistical analysis .Result Among these 135 samples ,6(4 .4% ) were HRV positive , including 4 positive for HRV-A and 2 positive for unknown genotype .The age of children with HRV positive was 8 months to 8 years ,including 5 cases ≤ 3 years old .The nucleotide homology within 4 HRV-A samples varied 76 .5% -100 .0% .These 4 HRV-A sequences were respectively compared with reference strains of HRV-A ,HRV-B and HRV-C in GenBank .The nucleotide homology varied 73 .1% -91 .7% ,57 .8% -66 .0% and 59 .0% -65 .0% ,respectively .Among 135 children with ALRTI ,124 were diagnosed with ordinary pneumonia including 4 (3 .2% ,4/124) HRV positive and 11 were diagnosed with severe pneumonia (with respiratory failure and/or heart failure) including 2 HRV positive .All children with HRV presented with fever and cough .Most of them (5/6) were co-infected with other pathogens .In 5 children with HRV positive ,the peripheral blood leukocyte counts were less than 10 × 109/L , neutrophil percentages were less than 0 .50 ,C-reactive protein was less than 8 mg/L and procalcitonin was less than 0 .05 μg/L .All the children were clinically cured .Conclusions The detection of HRV in BALF samples indicates that HRV is one of the pathogens in children with ALRTI in Shanghai and HRV-A is more common .Gene fragments of VP4/VP2 capsid protein of HRV pathogenic strains display a high degree of genetic variability .
