Use of single-strand conformation polymorphism technique for the initial characterization of virus isolates

Typing of LaCrosse, snowshoe hare, and Tahyna viruses by analyses of single-strand conformation polymorphisms of the small RNA segments

Single-strand conformation polymorphism analysis was developed to differentiate the small RNA segments of three California serogroup bunyaviruses. The small RNA segments of La Crosse, snowshoe hare, and Tahyna viruses were reverse transcribed and PCR amplified. The cDNAs were then denatured, rapidly chilled to promote intrastrand reassociation, separated electrophoretically on a nondenaturing gel at room temperature, and silver stained. The resulting single-strand conformation polymorphism patterns were specific for the respective viruses. This molecular technique offers great potential for virus typing and taxonomic studies.

Instant RNA isolation from virus-infected tissue culture fluid for the polymerase chain reaction

This paper describes an efficient method of RNA isolation, enabling RNA templates to be obtained for reverse transcription within 20 min. The procedure avoids the use of hazardous organic chemicals and ethanol precipitation, and does not require ultracentrifugation. Results are presented for extraction of RNA from virus-infected tissue culture fluid, infected cell sheets, vaccine bulk material and lyophilized commercial vaccines.