Navigation Links
Transplanting Animal Organs Could Soon Be A Reality

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. Affymetrix Unveils Plans to Double Plant and Animal Genome Microarray Offering
2. Study Links Ebola Outbreaks To Animal Carcasses
3. Gene Therapy For Parkinsons Disease Moves Forward In Animals
4. Animal models show that anabolic steroids flip the adolescent brains switch for aggression
5. Animals can change genes quickly to keep up with viral ingenuity
6. Animal brains hard-wired to recognize predators foot movements, Queens study suggests
7. Novel Therapy Tested in Mice Could Chase Away Cat Allergies
8. Spider Venom Could Yield Eco-Friendly Insecticides
9. New Breast Cancer Test Could Save Lives
10. Discovery Could Lead To Novel Approaches In HIV Treatment
11. New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/10/2016)... , March 10, 2016   Unisys Corporation ... and Border Protection (CBP) is testing its biometric identity ... San Diego to help identify certain non-U.S. citizens ... . The test, designed to help determine the efficiency and ... began in February and will run until May 2016. ...
(Date:3/9/2016)... , March 9, 2016  Crossmatch ® ... and enrollment solutions, today announced the addition of ... Altus multi-factor authentication platform. New contextual ... managers to step-up security where it,s needed most ... Washington, DC . --> ...
(Date:3/3/2016)... March 3, 2016  2016FLEX, organized by FlexTech, ... highlighting advancements in flexible, hybrid and printed electronics. ... attendance - have gathered for short courses, technical ... of electronics. The Flex Conference celebrates its 15 ... companies, R&D organizations, and universities contributing to the ...
Breaking Biology News(10 mins):
(Date:4/27/2016)... ... April 27, 2016 , ... Cambridge Semantics, the leading ... today announced that it has been named to The Silicon Review’s “20 Fastest Growing ... other markets, Cambridge Semantics serves the needs of end users facing some of the ...
(Date:4/27/2016)... VANCOUVER, British Columbia , April 27, 2016 ... "Gesellschaft" oder "NanoStruck") (CSE: NSK) (OTCPink: NSKQB) ( ... sie im Anschluss an ihre Pressemitteilung vom 13. ... Inc. erhalten hat, ihre Finanzen um zusätzliche 200.000.000 ... auf 4.000.000 Kanadische Dollar zu bringen. Davon wurden ...
(Date:4/27/2016)... , ... April 27, 2016 , ... ... PhD to its Scientific Advisory Board. Dr. Lamka will assist PathSensors in expanding ... detection. , PathSensors deploys the CANARY® test platform for the detection of ...
(Date:4/27/2016)... 27, 2016 MedDay, a biotechnology company ... the appointment of Catherine Moukheibir as Chairman of its Board ... Jean Jacques Garaud , who contributed to the rapid ... immediately. Catherine started her career in strategy consulting ... London .  She held C-Suite level roles ...
Breaking Biology Technology: