ABSTRACT
Rapid and accurate detection of norovirus is essential for the prevention and control of norovirus outbreaks. This study compared the effectiveness of a new immunochromatographic assay kit (SD BIOLINE Norovirus; Standard Diagnostics, Korea) and real-time reverse transcription-PCR (RT-PCR) for detecting norovirus in fecal specimens. Compared with real-time RT-PCR, the new assay had sensitivity, specificity, positive predictive value, and negative predictive value of 76.5% (52/68), 99.7% (342/343), 98.1% (52/53), and 95.5% (342/358), respectively. The sensitivity of the assay was 81.8% (18/22) for GII.3 and 75.7% (28/37) for GII.4. None of the 38 enteric virus-positive specimens (3 for astrovirus, 5 for enteric adenovirus, and 30 for rotavirus) tested positive in the cross-reactivity test performed by using this assay. The new immunochromatographic assay may be a useful screening tool for the rapid detection of norovirus in sporadic and outbreak cases; however, negative results may require confirmatory assays of greater sensitivity.
Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Humans , Infant , Middle Aged , Acute Disease , Caliciviridae Infections/diagnosis , Feces/virology , Gastroenteritis/diagnosis , Immunoassay , Norovirus/genetics , RNA, Viral/analysis , Reagent Kits, Diagnostic , Reverse Transcriptase Polymerase Chain Reaction , Sensitivity and SpecificityABSTRACT
During 3 years surveillance (January 2001 through December 2003) for acute gastroenteritis in human in Daejeon region, 432 out of 4,869 stool samples were selected as rotavirus-positive specimens by means of antigen-capture enzyme-linked immunosorbent assay (ELISA). The P (VP4) and G (VP7) genotypes for 432 stool samples were investigated by reverse transcription polymerase chain reaction (RT-PCR) and nested multiplex PCR. The most prevalent P subtype was P[8] (44.9%), followed by P[4] (25.7%) and P[6] (17.1%). No cases for P[10] and P[9] subtypes were found through the study. In G subtyping, G1 (53.2%) was the most frequently found G type, followed by G2 (23.1%), G3 (9.5%), G4 (6.7%), and G9 (0.9%). The order of detection rates for G2, G3 and G4 was variable by years. The most common G- and P- type combination found in this study was G1P[8] (33.1%), followed by G2P[4] (20.4%), G1P[6] (10.0%), G3P[8] (7.2%) and G4P[6] (4.2%). The mixed types of G and P were observed most frequently in P[8] (1.4%) and G1 (3.2%), respectively. This is the first molecular epidemiological study for Group A rotavirus in Daejeon region. The results might be useful data for evaluating the epidemiological status of rotaviral diarrhea in the region.