Page 4 of articles about influenza in Abstracts

The objective of this study was to determine transmission parameters for an H1N1 influenza virus in vaccinated and non-vaccinated populations of pigs and assess the effect of vaccination on influenza transmission.

This study indicates that vaccine induced maternal immunity may be able to reduce influenza virus transmission in population settings; however, the impact will depend on the priming antigen.

The present study provided important information on SIV surveillance that will enable better understanding of SIV ecology in farrow-to-finish farms.

A swine H3N2 and pandemic (H1N1) 2009 influenza A virus reassortant was detected in Canadian swine at the end of 2010 and a similar virus was also detected in Canadian mink based on partial viral genome sequencing.

This study evaluates the sensitivity of PCR on oral fluids in detecting influenza virus in vaccinated and non-vaccinated pigs.

The objective of this study was to determine Ro of flu in non-immune populations and in populations of pigs vaccinated with homologous or heterologous vaccines and to assess how vaccination may affect transmission.

Oral fluid testing is becoming important tool in diagnostic and epidemiological studies of PRRSV, PCV2 and SIV infections. However, sample collection requires understanding of pigs behavior as many of it aspects directly impact the yield of oral fluid. The aim of the present study is to analyse factors affecting the amount of oral fluid collected in standard pig herds in Poland.

This study was conducted to describe the disease ecology of influenza virus in infected swine breeding farms.

Swine outbreaks of pandemic influenza A (pH1N1) suggest human introduction of the virus into herds. This study investigates a pH1N1 outbreak occurring on a swine research farm with 37 humans and 1300 swine in Alberta, Canada, from 12 June through 4 July 2009.

With the objective of determining the dynamic of influenza virus (SIV) infection in a closed cycle farm, investigators from CReSA (Spain) selected a complete batch of piglets weaned at 3 weeks (n=121) from a farm of sows that tested positive for SIV antibodies. They took nasal swabs and blood samples weekly, from week 3 to week 13, and then at weeks 15, 17, 20 and 24. On each visit to the farm, a clinical inspection of the sows was carried out.

To investigate the role of IFN-α in influenza, the swine IFN-α neutralizing monoclonal antibody (Ab) K9 was applied in a swine model of influenza A virus infection. First, the optimal dose and route for administration of the IFN-α neutralizing Abs was determined. Based on those results, the effect of the Abs on a swine influenza virus infection was investigated.

Swine workers had serologic evidence for infection with both swine and human influenza viruses and were exposed to diverse influenza virus strains circulating in pigs. Influenza virus surveillance among pigs and swine workers should be encouraged to better understand cross-species transmission and diversity of influenza viruses at the human-swine interface.

Animals firstly infected with SwH1N1 virus and latter infected with pH1N1 exhibited undetectable viral RNA load in nasal swabs and lungs after challenge with pH1N1, indicating a cross-protective effect between both strains.