Navigation Links
European Commission funds EBI to do new research on synergies between bioinformatics and medical informatics

In findings with implications for pandemic influenza, a new study reports for the first time that a less-virulent strain of avian influenza virus can spread from poultry to humans. The research appears in the October 1 issue of The Journal of Infectious Diseases, now available online.

Crossing the species barrier is an important step in the development of a flu virus with pandemic potential. Previous studies have focused on the ability of highly pathogenic strains, such as H5N1 "bird flu" circulating in Asia, to spread from poultry to humans. The new study shows less pathogenic strains are also capable of jumping to humans, giving them the opportunity to swap genetic material with human strains, which could result in a more virulent virus.

Researchers in Italy studied outbreaks that occurred among poultry between 1999 and 2003, to determine the risk of avian influenza virus transmission to persons in contact with the animals. The outbreaks occurred in northern Italy in regions where the majority of the country's commercial poultry are raised on farms. Most previous cases of human infection with avian influenza viruses have involved close contact with infected poultry, particularly ill or dying chickens.

The investigators performed a serologic analysis of individuals exposed to infection during the outbreaks, collecting 983 blood samples from poultry farm workers in the outbreak regions. Blood was tested using three different techniques to ensure the validity of results.

The outbreaks involved two serotypes of avian influenza: one low and one highly pathogenic H7N1 and a low pathogenic H7N3 virus. Seven individuals exposed to the more recent outbreak of low pathogenic H7N3 tested seropositive for H7N3. The infected persons came from different farms in two locations and had close contact with turkeys or chickens. No serious symptoms were reported in connection with the infections.

The authors of the study, Dr. Isabella Donate lli of Istituto Superiore di Sanit?in Rome and colleagues, noted that their work provides the first serologic evidence of transmission of low pathogenic strains of avian influenza virus to humans during an outbreak in domestic poultry. Previous reports of human infection in Asia, Canada, and the Netherlands have been associated, in contrast, with highly pathogenic strains. The investigators emphasized that their study probably underestimates the real infection rate of the two strains among exposed individuals, since blood samples were considered positive only if they repeatedly produced unequivocal positive results using several different serologic techniques. They commented, however, that very sensitive serologic techniques such as those developed in the study provide an efficient tool for preventing or controlling the spread of avian flu to humans.

The authors say their findings highlight the importance of improving disease surveillance not only during outbreaks of highly pathogenic avian flu, but also when less pathogenic strains are circulating. To forestall genetic exchange between human and avian strains, as in mixed infections, they emphasized that poultry workers should be systematically vaccinated, pointing out that such workers are identified as high-risk and included in the annual Italian vaccination campaign.

In an accompanying editorial, Frederick Hayden, MD, of the University of Virginia and Alice Croisier, MD, of the World Health Organization concluded, "The transmissibility of avian viruses may increase as the viruses adapt to humans. In affected countries, public education about simple precautionary measures for food preparation, poultry handling, and avoidance of contaminated water are essential until specific prevention measures such as vaccines become available."


'"/>

Source:


Related biology news :

1. Biologists discover why 10% of Europeans are safe from HIV
2. OneWorld Health drug receives Orphan designation from U.S. and European regulatory agencies
3. Oldest cranial, dental and postcranial fossils of early modern European humans confirmed
4. Earliest European Farmers Left Little Genetic Mark On Modern Europe
5. Do the Europeans turn ill sitting up so late?
6. First-time analysis reveals millions of Europeans left at risk from influenza
7. W.M. Keck Foundation funds study of friendly microbes
8. WHO suspends Marburg work, appeals for new funds
9. Grand Challenges in Global Health initiative funds Yale project
10. Federal grant funds research on novel HIV therapy
11. Columbia research lifts major hurdle to gene therapy for cancer
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:12/22/2016)... 20, 2016  As part of its longstanding mission to ... genetics company, recently released its latest children,s book, titled ... focuses on the topics of inheritance and variation of traits ... taught in elementary school classrooms in the US. ... illustrator Ariana Killoran , whose previous book with 23andMe, ...
(Date:12/16/2016)... --  IdentyTechSolutions America LLC , a leading provider ... a cutting-edge manufacturer of software and hardware security ... integrated solutions that comprise IDT biometric readers and ... IdentyTech,s customers with combined physical identification and anti-tailgating ... theft. "We are proud to use ...
(Date:12/15/2016)... ... and Markets has announced the addition of the "Global Military Biometrics ... forecasts the global military biometrics market to grow at a CAGR of ... prepared based on an in-depth market analysis with inputs from industry experts. ... coming years. The report also includes a discussion of the key vendors ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... and HOUSTON , ... ("NX Prenatal") today announced the formation of its ... leading clinicians and industry veterans who enhance the ... as it accelerates development of its novel prenatal ... provide medical, clinical and strategic guidance for the ...
(Date:1/19/2017)... ... January 19, 2017 , ... ... software to leading biopharmaceutical and medical device manufacturers and regulators, is proud to ... CFR Part 11-compliant email client designed to provide product vigilance departments with the ...
(Date:1/19/2017)... ... 2017 , ... The American Medical Informatics Association (AMIA) today ... Policy. Specifically, the nation’s leading informatics experts, said data sharing plans should be ... recommended that NIH earmark funding for researchers to produce and execute data sharing ...
(Date:1/19/2017)... 18, 2017 The global biotechnology services ... billion by 2025, according to a new report ... been adaptive of the function of outsourcing certain ... Among the services outsourced, clinical trial management and ... & Johnson was the first pharmaceutical company to ...
Breaking Biology Technology: