Navigation Links
Bird flu study highlights need to vaccinate flocks effectively

Incomplete vaccination of poultry flocks could make the spread of deadly strains of avian flu such as H5N1 worse, scientists at the Universities of Edinburgh and Warwick have found. The research shows that even though the available vaccines are effective on individual birds, the disease is likely to spread unless almost all of a flock has been protected. The study, published in Nature journal, is the first to quantify how incomplete vaccination of flocks can contribute to the undetected spread of the disease.

Vaccination of commercial poultry against highly pathogenic avian flu like H5N1 is proving controversial because it is thought that it can lead to unseen transmission between poultry farms, a phenomenon known as 'silent spread'. This unseen transmission occurs because as protection levels rise in a flock, it becomes ever harder to detect the spread of avian flu quite simply because fewer birds die. The result is increasing amounts of bird flu virus contaminating the birds' surroundings without farmers realising it.

In practice, it is very hard to protect more than about 90 per cent of the birds in any given flock, and protection levels are usually much lower than this. The new study estimates that protection levels of more than 95 per cent would be needed to guard against silent spread.

The study, funded by the Department of Environment, Food and Rural Affairs, suggests that the most effective way of tackling silent spread of the disease would be to place unvaccinated 'sentinel' birds in poultry flocks. By monitoring birds carefully, silent spread could be reduced (though not completely eliminated) because sentinels allow for the rapid detection of bird flu, irrespective of the level of vaccine protection in a flock.

Dr Nick Savill, of the University of Edinburgh's Centre for Infectious Diseases, said: "Vaccination reduces the chance of birds becoming infected and reduces the amount of virus they shed and the time over wh
'"/>

Source:University of Edinburgh


Page: 1 2

Related biology news :

1. Bioartificial kidney under study at MCG
2. W.M. Keck Foundation funds study of friendly microbes
3. Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
4. Genome-wide mouse study yields link to human leukemia
5. Clam embryo study shows pollutant mixture adversely affects nerve cell development
6. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
7. Same mutation aided evolution in many fish species, Stanford study finds
8. Sequencing of marine bacterium will help study of cell communication
9. Genetically modified rice in China benefits farmers health, study finds
10. A new study examines how shared pathogens affect host populations
11. NYU study reveals how brains immune system fights viral encephalitis
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Bird flu study highlights need vaccinate flocks effectively

(Date:7/10/2014)... inflammatory skin diseases psoriasis* and eczema** are similar in ... base their decision on which treatment should be selected ... samples. A team of researchers at the Helmholtz Zentrum ... now analyzed the molecular processes that occur in both ... for the first time to gain a detailed understanding ...
(Date:7/9/2014)... pivotal in the development of cancer, viral infection and ... question about one of the most widely-researched proteins in ... of thousands of research papers and millions of pounds ... in Professor Sir Philip Cohen,s laboratory at the University ... is activated. The results are published today ...
(Date:7/9/2014)... LAFAYETTE, Ind. - Regulated deer hunts in Indiana state ... from decades of damage caused by overabundant populations of ... team led by Michael Jenkins, associate professor of forest ... Resources policy of organizing hunts in state parks has ... and wildflowers rendered scarce by browsing deer. , ...
Breaking Biology News(10 mins):New diagnostic test to distinguish psoriasis from eczema 2Research reveals how key controller protein is switched on 2Hunting gives deer-damaged forests in state parks a shot at recovery 2
... The American Psychological Association, the largest psychological ... "Distinguished Scientific Award for Early Career Contribution to ... Research Institute at the University of Veterinary Medicine, ... Range,s ground-breaking research on animal cognition and will ...
... the researchers to see an aspect of light that humans ... sensitive to polarized light, many reef dwelling animals are but ... studies of reef communities. Thanks to generous support provided ... team of researchers from the Ecology of Vision Laboratory in ...
... of rare, endemic species in the Central Andes remain ... climate change, according to a Duke University-led international study. ... particularly vulnerable to changes in the environment or climate. ... percent of the areas with high numbers of these ...
Cached Biology News:Dancing with wolves -- prestigious award goes to a scientist at the Vetmeduni Vienna 2Capturing an octopus-eye view of the Great Barrier Reef 280 percent of 'irreplaceable' habitats in Andes unprotected 2
(Date:1/15/2014)... Scottsdale, Arizona (PRWEB) January 15, 2014 ... growth for Scottsdale’s Brain State Technologies®. They saw continued ... University Medical Center who were awarded a $1 million ... papers published in “Brain and Behavior” a peer reviewed ...
(Date:1/15/2014)... AudioNotch is the internet's leading provider ... treatment of tinnitus. Patients listen to sound therapy that ... period of weeks to months, their tinnitus volume decreases. , ... Notched Music and Notched White Noise. Now, AudioNotch is pleased ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, April ... Location: Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... nonprofit organization solely dedicated to finding a cure for hepatitis ... worldwide, will host its annual Crystal Ball on Friday, April ...
(Date:1/14/2014)... San Diego, CA (PRWEB) January 14, 2014 ... based on the products of cells grown under simulated ... an international license agreement with Suneva Medical, Inc. for ... media (CCM). , This agreement is an ...
Breaking Biology Technology:Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3
... This release is available in German ... say, on plastic foils, have excellent potential to lower ... called "balance-of-system" cost, thus enabling affordable solar electricity in ... on polymer films have been lacking behind in performance ...
... Generex Biotechnology Corporation,s (OTCBB: GNBT) ( www.generex.com ) wholly-owned ... that its lead drug candidate AE37, a novel HER-2/neu-targeted ... of breast cancer, is featured in the October 2011 ... titled "A New Ally Against Cancer" by Eric von ...
... NEW YORK, Sept. 21, 2011 Reportlinker.com announces ... in its catalogue: Separation ... http://www.reportlinker.com/p0619255/Separation-Systems-for-Commercial-Biotechnology.html#utm_source=prnewswire&utm_medium=pr&utm_campaign=Biotechnology THIS REPORT ... the U.S. market for separation systems for commercial ...
Cached Biology Technology:How to produce flexible CIGS solar cells with record efficiency 2Antigen Express' AE37 Cancer Vaccine Featured in Scientific American 2Antigen Express' AE37 Cancer Vaccine Featured in Scientific American 3Antigen Express' AE37 Cancer Vaccine Featured in Scientific American 4Separation Systems for Commercial Biotechnology 2Separation Systems for Commercial Biotechnology 3Separation Systems for Commercial Biotechnology 4Separation Systems for Commercial Biotechnology 5Separation Systems for Commercial Biotechnology 6Separation Systems for Commercial Biotechnology 7Separation Systems for Commercial Biotechnology 8Separation Systems for Commercial Biotechnology 9Separation Systems for Commercial Biotechnology 10Separation Systems for Commercial Biotechnology 11
... fixative useful for routine procedures. Hollandes contains ... and will decalcify small bone specimens. Tissue ... stained successfully with most stains, and the ... blood cell membranes and cosinophil and endocrine ...
... fixative useful for routine procedures. Hollandes contains ... and will decalcify small bone specimens. Tissue ... stained successfully with most stains, and the ... blood cell membranes and cosinophil and endocrine ...
Chicken polyclonal antibody to Glutathione-S-Transfrease (GST)...
... Acuity is the complete enterprise microarray informatics platform ... analysis. Buy Acuity once and use it forever ... Tools for Quality Acuity has all the ... from your data, from quality control statistics and ...
Biology Products: