Genogrouping Gi Gii
Genogrouping Gi Gii - Related Videos
15:16
Detection and Genogrouping of Noroviruses from Children's Stools By Taqman One-step RT-PCR
0 Views •
Cited by 13 •
2012
A One-Step RT-PCR assay for detection and genogroup identification of Norovirus isolates from children’s stools, that utilizes primers and TaqMan probes specific to the open reading frame 1 (ORF1)-ORF2 junction region, the most conserved region of the Norovirus genome is described. A non-commercial, cost-effective RNA extraction method is detailed.
12:32
EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. Part III. Virus Detection by RT-qPCR
0 Views •
Cited by 13 •
2016
Here we present a procedure to quantify enterovirus and norovirus in environmental and drinking waters using reverse transcription-quantitative PCR. Mean virus recovery from groundwater with this standardized procedure from EPA Method 1615 was 20% for poliovirus and 30% for murine norovirus.
11:42
A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries
0 Views •
Cited by 8 •
2018
This manuscript introduces a robust method of fabricating concave microwells without the need for complex high-cost facilities. Using magnetic force, steel beads, and a through-hole array, several hundred microwells were formed in a 3 cm x 3 cm polydimethylsiloxane (PDMS) substrate.
10:27
Lab-on-a-CD Platform for Generating Multicellular Three-dimensional Spheroids
0 Views •
Cited by 2 •
2019
We present a motor-powered centrifugal microfluidic device that can cultivate cell spheroids. Using this device, spheroids of single or multiple cell types could be easily cocultured under high gravity conditions.
11:10
Isolation of Human Islets from Partially Pancreatectomized Patients
0 Views •
Cited by 10 •
2011
The supply of type 2 diabetic islets for research is insufficient. Here we share our protocol for isolating islets from patients undergoing partial pancreatectomy. This approach represents a unique venue for obtaining islets from type 2 diabetic and clinically matched non-diabetic subjects in adequate numbers for basic and clinical studies.
FAQs
The distinction relies on detecting viral RNA and then applying group-specific molecular signals. Reverse-transcription polymerase chain reaction amplifies RNA from a laboratory specimen, while genotype-specific primers or probes identify GI or GII targets. This targeted approach gives laboratories a genetic classification that can be used alongside diagnostic testing and epidemiological surveillance of acute gastroenteritis.
The capsid and polymerase regions provide genetic material for sequence-based identification of the virus. Comparing sequence information from these regions can support assignment to GI or GII and help characterize circulating strains. Their use connects routine detection with broader investigations of norovirus variation, evolution, and patterns observed during surveillance.
GI and GII results add genetic context to a positive norovirus finding. Because the two groups differ in distribution, transmission patterns, and prevalence, their identification helps laboratories recognize which group is circulating in a setting. That information supports comparisons among cases and strengthens interpretation of epidemiological trends rather than treating all detections as genetically identical.
After amplification by reverse-transcription polymerase chain reaction, laboratories can use genotype-specific primers, genotype-specific probes, or sequence analysis. Primer- and probe-based methods identify predefined genetic targets, whereas sequencing examines information in capsid or polymerase regions. These complementary approaches provide practical options for assigning a specimen to GI or GII during laboratory investigations.
During an outbreak investigation, assigning specimens to GI or GII helps compare the genetic group found in different cases. Matching group patterns can contribute to linking cases with potential sources, while observed differences may provide useful epidemiological distinctions. The resulting information supports public-health responses and helps track which norovirus groups are circulating during an event.
Genogrouping is valuable when acute gastroenteritis cases require genetic characterization or when surveillance must follow circulating norovirus groups. Laboratories and public-health programs can use the results to monitor distribution, transmission patterns, prevalence, and outbreak-associated strains. Researchers also apply the information to studies of norovirus evolution, detection, and prevention, extending its relevance beyond individual diagnosis.