Showing posts with label viruses. Show all posts
Showing posts with label viruses. Show all posts

Monday, October 28, 2024

H5N1 pig to human

 

HPAI H5N1 influenza virus, isolated from the eye of a farm worker who became infected through contact with dairy cows, was lethal in mice and ferrets infected in a high-containment laboratory environment, a new NIAID-funded study in Nature shows. The study also showed that the virus isolated from the worker, who experienced mild eye disease (conjunctivitis), could be transmitted through the air between separated ferrets and might be capable of binding to and replicating in human respiratory tract cells. The researchers, led by a team from the University of Wisconsin, speculate that multiple exposures to seasonal human influenza viruses might provide people with low levels of protection against currently circulating HPAI H5N1 viruses – though additional study is needed. Every effort should be made, they say, to contain HPAI H5N1 outbreaks in dairy cattle to limit the possibility of further human infections.

Thursday, July 8, 2021

virus species

 virus metadata resource

https://talk.ictvonline.org/taxonomy/vmr/

Information on exemplar viruses for each species

The primary, definitive lists of exemplar viruses for each species is provided in chapters of the ICTV Report on Virus Classification and Taxon Nomenclature http://ictv.global/report). The list of exemplar viruses appears in the Member Species tables for each genus. For example, for the genus Cyclovirus, the Member Species table appears near the bottom of the following web page: https://talk.ictvonline.org/ictv-reports/ictv_online_report/ssdna-viruses/w/circoviridae/660/genus-cyclovirus.

On this page, we have made available a spreadsheet that contains this list of exemplars for each virus species, even those not yet described in a published ICTV Report chapter.

The Member Species tables and the VMR are the definitive sources for exemplar information, and are both updated based on new information and to correct errors. Taxonomy proposals (available from https://talk.ictvonline.org/files/ictv_official_taxonomy_updates_since_the_8th_report/) represent a snapshot in time and are not updated after the proposal is ratified. They are historical documents, and are therefore not a good source of current information on virus taxa and exemplar viruses.

Wednesday, October 16, 2013

how many viruses, bacteria, plants and animals on earth?



How much viruses on planet earth? 10^31 based on Carl Zimmer's blog.

http://www.virology.ws/2009/10/19/ten-cool-facts-about-viruses/

http://phenomena.nationalgeographic.com/2013/02/20/an-infinity-of-viruses/

Quote from Carl Zimmer's blog:
RNA viruses made up between 38 and 63% of the viruses in the sea water. In other words, about half of the viruses in the ocean are RNA viruses.


viruses invented DNA?

Total number of bacteria on planet earth
http://www.sdearthtimes.com/et0998/et0998s8.html
5x10^30 (Hmm, this is only half of the 10^31 viruses of Carl Zimmer's blog).

How many single-cell organisms on ocean floor? 2.9x10^29
http://www.nature.com/news/there-are-fewer-microbes-out-there-than-you-think-1.11275
(Who this would include prokaryote, archea, and eukayote).

I did not find quotes on how many plants and animals on earth.

June 17, 2015 Biomass of plants, animals, fungi, prokaryotes, viruses are summarized in the following plos biology paper.


Tuesday, September 24, 2013

Survival probability of computer viruses is exponential

Romualdo Pastor-Satorras, Alessandro Vespianai, Physical Review Letters, 2001, Epidemic spreading in scale-free networks.