Results 21 to 30 of about 188,793 (261)

Partial Functional Rescue of Helicoverpa armigera Single Nucleocapsid Nucleopolyhedrovirus Infectivity by Replacement of F Protein with GP64 from Autographa californica Multicapsid Nucleopolyhedrovirus [PDF]

open access: yes, 2010
Two distinct envelope fusion proteins (EFPs) (GP64 and F) have been identified in members of the Baculoviridae family of viruses. F proteins are found in group II nucleopolyhedroviruses (NPVs) of alphabaculoviruses and in beta- and deltabaculoviruses ...
Feifei Yin   +15 more
core   +1 more source

Prions in Milk from Ewes Incubating Natural Scrapie [PDF]

open access: yes, 2008
Since prion infectivity had never been reported in milk, dairy products originating from transmissible spongiform encephalopathy (TSE)-affected ruminant flocks currently enter unrestricted into the animal and human food chain.
Bergonier Dominique   +68 more
core   +2 more sources

Analysis of SARS-CoV-2 variants B.1.617: host tropism, proteolytic activation, cell–cell fusion, and neutralization sensitivity

open access: yesEmerging Microbes and Infections, 2022
SARS-CoV-2 has caused the COVID-19 pandemic. B.1.617 variants (including Kappa and Delta) have been transmitted rapidly in India. The transmissibility, pathogenicity, and neutralization characteristics of these variants have received considerable ...
Li Zhang   +21 more
doaj   +1 more source

Survival of Trichinella papuae muscle larvae in a pig carcass maintained under simulated natural conditions in Papua New Guinea [PDF]

open access: yes, 2007
In Papua New Guinea, Trichinella papuae, a non-encapsulated species, is circulating among wild and domestic pigs and saltwater crocodiles. Since an important phase of the life cycle of nematodes of the genus Trichinella is the time of survival of ...
Ifor L. Owen   +5 more
core   +1 more source

A quantitative assessment of the amount of prion diverted to category 1 materials and wastewater during processing [PDF]

open access: yes, 2012
In this article the development and parameterization of a quantitative assessment is described that estimates the amount of TSE infectivity that is present in a whole animal carcass (bovine spongiform encephalopathy [BSE] for cattle and classical ...
Adkin, A.   +5 more
core   +4 more sources

Some effects of freezing in the leaf, and of citrate in vitro, on the infectivity of a tobacco necrosis virus [PDF]

open access: yes, 1950
SUMMARY: Preparations of the Rothamsted tobacco necrosis virus made from tobacco leaves that have been frozen while intact are less infective than preparations made from unfrozen leaves.
Pirie, N. W., Bawden, F. C.
core   +1 more source

A Methodology for Determining Which Diseases Warrant Care in a High-Level Containment Care Unit

open access: yesViruses, 2019
Although the concept of high-level containment care (HLCC or ‘biocontainment’), dates back to 1969, the 2014−2016 outbreak of Ebola virus disease (EVD) brought with it a renewed emphasis on the use of specialized HLCC units in the care ...
Theodore J. Cieslak   +3 more
doaj   +1 more source

Infectivity of Norovirus GI and GII from Bottled Mineral Water during a Waterborne Outbreak, Spain

open access: yesEmerging Infectious Diseases, 2020
During a waterborne outbreak of norovirus in Spain, we estimated 50% illness doses for a group of exposed (secretor) persons to be 556 (95% CI 319–957) genome copies/day for norovirus GI and 2,934 (95% CI 1,683–5,044) genome copies/day for norovirus GII.
Susana Guix   +11 more
doaj   +1 more source

Interactions between free-living amoebae and Cryptosporidium parvum: an experimental study

open access: yesParasite, 2023
Free-Living Amebae (FLA) and Cryptosporidium oocysts occasionally share the same environment. From 2004 to 2016, Cryptosporidium was responsible for 60% of 905 worldwide waterborne outbreaks caused by protozoan parasites.
Lefebvre Marion   +8 more
doaj   +1 more source

Effect of Di-ethyl aminoethyl (DEAE) Dextran on the infectivity titre of sheep pox virus in-vitro and in-vivo [PDF]

open access: yesJournal of Veterinary Medical Research, 2010
The effect of diethyl aminoethyl (DEAE) dextran on the infectivity titre of sheep pox virus (SPV) was studied with different concentrations (25, 50, 75, 100 μg/ml) of DEAE-dextran on Vero cell culture. It was found that 25 and 50μg/ml were not toxic. The
Olfat E. Nakhla   +3 more
doaj   +1 more source

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