id author title date pages extension mime words sentences flesch summary cache txt cord-350737-nrtrhq1f Chen, Xinchun Serology of Severe Acute Respiratory Syndrome: Implications for Surveillance and Outcome 2004-04-01 .txt text/plain 3474 133 50 A virus from the family Coronaviridae, termed "SARS coronavirus" (SARS CoV), has been identified as the cause [2] [3] [4] [5] [6] [7] , and criteria for laboratory confirmation of SARS CoV infection have been provided by WHO, on the basis of the following methods: (1) detection of SARS CoV RNA by reversetranscription polymerase chain reaction (RT-PCR); (2) serological detection of SARS CoV-related antibody; and (3) isolation of SARS CoV by cell culture [4] . Using an indirect immunofluorescence assay and parallel acute and convalescent serum samples obtained from patients with SARS, tested for IgG antibody to SARS CoV, Peiris et al. In addition, our results indicated that 9 (25.0%) of 36 patients with probable SARS CoV infection had not produced detectable anti-SARS CoV antibody by day 21 after the onset of fever; this implies that 25.0% of patients with SARS might be misdiagnosed by the laboratory confirmation guidelines that WHO currently recommends [5] . ./cache/cord-350737-nrtrhq1f.txt ./txt/cord-350737-nrtrhq1f.txt