• Zhongguo Yi Xue Ke Xue Yuan Xue Bao · Oct 2003

    [Isolation and identification of SARS-coronavirus in nasal and throat swabs collected from clinically diagnosed SARS patients].

    • An-ping Ni, Zhong Wang, Yong Liu, Shi-de Liu, Ye-hua Han, Yan Shen, and Bo-qin Qiang.
    • Department of Clinical Laboratory, PUMC Hospital, CAMS and PUMC, Beijing 100730, China. niap@csc.pumch.ac.cn
    • Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 2003 Oct 1; 25 (5): 520-4.

    ObjectiveTo isolate and identify SARS-coronavirus in nasal and throat swabs collected from clinically diagnosed severe acute respiratory syndrome (SARS) patients.MethodsNasal and throat swab specimens were inoculated onto well of 24-well plate containing confluent monolayers of Vero and MRC-5 cells. Isolates were identified with serology, electron microscopy and genome sequence.ResultsOne hundred and fifty-eight nasal and throat swabs specimens from 79 SARS patients in Peking Union Medical College Hospital between April and May, 2003 were cultured for SARS-coronavirus. Cytopathic effect (CPE) was found in three nasal swab specimens inoculated in Vero cells. Acute and convalescent phase serum specimens collected from SARS patients were found with seroconversions and/or a fourfold or greater rises in indirect fluorescence antibodies (IgG and IgM) titers when the 3 isolates (infected Vero cells) were used as antigen. Coronavirus was observed in the culture supernatant by negative-stain electron microscopy. Genome sequence confirmed the isolates were SARS-coronavirus.ConclusionsThe 3 isolates from nasal and throat swabs samples collected from 79 clinically diagnosed SARS patients were SARS coronavirus.

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