Detection of human metapneumovirus in respiratory secretions by reverse-transcriptasepolymerase chain reaction, indirect imimunofluorescence, and virus isolation in human bronchial epithelial cells

被引:23
作者
Ingram, R. E.
Fenwick, F.
McGuckin, R.
Tefari, A.
Taylor, C.
Toms, G. L.
机构
[1] Newcastle Univ, Sch Med, Sch Clin Med Sci, Newcastle Upon Tyne NE2 4HH, Tyne & Wear, England
[2] Hlth Protect Agcy, NE Lab, Newcastle Upon Tyne, Tyne & Wear, England
关键词
diagnosis; culture; phylogenetic analysis; genotypes; antiserum;
D O I
10.1002/jmv.20685
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Over two winters in Newcastle upon Tyne, respiratory secretions, negative by immunofluorescence staining for other respiratory viruses, were tested for the presence of human metapneumovirus (HMPV) by RT-PCR. In the second winter, specimens were also tested by immunofluorescence staining with an anti-HMPV polyclonal rabbit antiserum and immunofluorescence positive specimens were inoculated into a line of human bronchiolar cells, 16HBE140. Overall, 55 of 549 (10%) specimens tested were positive for HMPV by RT-PCR. Of 162 specimens tested by both RT/PCR and immunofluorescence staining, 23 were positive by both techniques. Of five specimens positive by RT-PCR alone, only one was confirmed with a second set of primers. Of three specimens positive by immunofluorescence alone, only one was confirmed by virus culture. All four previously recognized sub-genotypes of the virus were identified by both RT-PCR and immunofluorescence staining. Sub-genotype A1 was prevalent in the first winter and B1 prevalent in the second. HMPV replication and virus isolation rates were higher in 16HBE140 cells than in monkey kidney cells and did not require exogenous trypsin. Low passage isolates of both sub-genotypes A2 and B1 replicated slowly reaching peak titers only 12 days after inoculation. In summary, single round RT/PCR and immunofluorescence staining with a polyclonal rabbit antiserum proved of equal sensitivity in the diagnosis of HMPV infection in respiratory secretions both detecting 96% of confirmed positive specimens. 16HBE40 cells provided a significant improvement on monkey kidney cells for the isolation and propagation of the virus.
引用
收藏
页码:1223 / 1231
页数:9
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