Retention of Virus Versus Surrogate, by Ultrafiltration in Seawater: Case Study of Norovirus Versus Tulane
The objectives of this work were to study (i) the ultrafiltration of Tulane virus and norovirus to validate that Tulane virus can be used as a surrogate for norovirus in water treatment process and (ii) the retention of norovirus and the surrogate as a function of water quality to better understand the use of the latter pathogenic viruses. Ul trafiltration tests showed significant logarithmic reduction values (LRV) in viral RNA: around 2.5 for global LRV (i.e., based on the initial and permeate average concentrations) and between 2 and 6 for average LRV (i.e., retention rate considering the increase of viral concentrat...
Source: Food and Environmental Virology - January 6, 2024 Category: Virology Source Type: research
Temporal changes in the positivity rate of common enteric viruses among paediatric admissions in coastal Kenya, during the COVID-19 pandemic, 2019 –2022
ConclusionOur study finds that in 2020 the transmission of common enteric viruses, especially RVA and astrovirus, in Kilifi Kenya may have been disrupted due to the COVID-19 NPIs. After 2020, local enteric virus transmission patterns appeared to return to pre-pandemic levels coinciding with the removal of most of the government COVID-19 NPIs. (Source: Gut Pathogens)
Source: Gut Pathogens - January 4, 2024 Category: Microbiology Source Type: research
Using molecular methods to delineate norovirus outbreaks: a systematic review
This study was conducted to estimate the threshold value of genomic variations among related strains within norovirus outbreaks. We carried out a literature search in the PubMed and Web of Science databases. SNP rates were defined as the number of SNPs/sequence length (bp) × 100%. The Mann-Whitney U-test was used in comparisons of the distribution of SNP rates for different sequence regions, genogroups (GI and GII), transmission routes, and sequencing methods. A total of 25 articles reporting on 108 norovirus outbreaks were included. In 99.1% of the outbreaks, the SN P rates were below 0.50%, and in 89.8%, the SNP rates w...
Source: Archives of Virology - January 3, 2024 Category: Virology Source Type: research
Persistence of Infectious Human Norovirus in Estuarine Water
In this study, we applied the recently established method of norovirus replication in human intestinal enteroids to determine the persistence of norovirus in artificial estuarine water at 25 ppt for up to 21 days at 4 °C and 16 °C in the dark. Infectious norovirus was detected for up to 21 days. The relative infectivity declined from 100 to 3% at day 21, with decay rate constants of 0.07 day−1 at 4 °C and 0.17 day−1 at 16 °C. There was no decrease in norovirus titres as measured by reverse transcription-droplet digital PCR (RT-ddPCR), confirming the lack of the relationship between norovirus infectivity ...
Source: Food and Environmental Virology - January 2, 2024 Category: Virology Source Type: research
Prediction of Foodborne Norovirus Outbreaks in Coastal Areas in China in 2008 –2018
Foodborne Pathogens and Disease, Ahead of Print. (Source: Foodborne Pathogens and Disease)
Source: Foodborne Pathogens and Disease - December 27, 2023 Category: Food Science Authors: Jiao Wang Lu Ran Mengying Zhai Chao Jiang Chao Xu Source Type: research
