Are people living near modern swine production facilities at increased risk of Influenza virus infection?
Findings suggest that concentrated swine feeding operations amplified transmission of influenza during years in which H1N1 was circulating.
Page 5 of articles about influenza
Distinct iImmune responses and virus shedding in pigs following infection with A(H1N1)09
Our data shows that natural infection by contact induces remarkably high innate and adaptive immune response, although the animals were exposed to a very low virus dose.
Immunisation of fattening pigs against influenza: a case study
The reasons behind the vaccination against influenza virus on a group of fattenig units with recurrent respiratory clinical pictures that belong to an integrated production system are discussed. Impact on production parameters and economic results are also shown.
The genetic diversity of contemporary swine influenza A viruses in the United States
In the United States, there are 17 genetic clades that have emerged and persisted following spillover events from non-swine (namely human) hosts and subsequent ecological and evolutionary processes
Health protocols for replacements: respiratory and systemic diseases (2/3)
We are talking about PRRSV, M. hyo, PCV2, App and swine influenza virus.
Evaluation of screening assays for the detection of Influenza A virus serum antibodies in swine
Serum antibodies against NP provide an ideal universal diagnostic screening target and could provide a cost-effective approach for the detection and surveillance of IAV infections in swine populations.
Considerations for selecting influenza vaccines for swine
Inactivated vaccines can be effective if used in conjunction with other practices, such as controlled movement of animals and people and with careful analysis of whether the vaccine antigen is a good antigenic match with the circulating strain.
Genome plasticity of triple-reassortant H1N1 influenza A virus during infection of vaccinated pigs
Results demonstrated remarkable IAV diversity, and the complex, rapid and dynamic evolution of IAV during infection of vaccinated pigs that can only be appreciated with repeated sampling of individual animals and deep sequence analysis.
Evolution of swine influenza viruses and its impact on antigenic cross-reactivity
Swine influenza viruses are diverse at genetic and antigenic level, resulting in a limited cross-reactivity in viruses sharing a common ancestor or belonging to a same subtype.
Heterologous challenge in the presence of maternally-derived antibodies results in vaccine-associated enhanced respiratory disease in weaned piglets
Our data indicates that although high titers of vaccine-derived MDA reduced homologous virus infection, transmission, and disease, MDA alone was sufficient to induce vaccine associated enhanced respiratory disease upon heterologous infection.
Characterization of viral load, viability and persistence of IAV in air and on surfaces
Our results indicate that during outbreaks of IAV in swine, aerosols and surfaces in barns contain significant levels of IAV potentially representing an exposure hazard to both swine and people.
Widespread detection and characterization of porcine parainfluenza virus 1 in pigs in the United States
Taken together, the results confirm the widespread presence of PPIV1 in the United States swine herd.
Flu productive impact
There are many open topics, such as: 1) what is the impact of the disease in endemic situations at the reproductive level (irregular return to estrus / fertility), especially in gilts; or 2) what is the productive impact in farrowing units, especially when we know that suckling piglets can play a role as a reservoir of the virus in an endemically infected farm.
Swine Influenza can persist endemically in Farrow-to-Finish farms
Infectious outbreaks can last for more than a month at a population level, which explain that a new batch including mainly susceptible piglets can get infected if the animals are housed in a separate room but in the same compartment (airborne transmission).
Cross-species infectivity of H3N8 influenza virus in an experimental infection in swine
Our data indicated that H3N8 IAV from wild aquatic birds have the potential to cross the species barrier and establish successful infections in pigs that might spread unnoticed using HAI as diagnostic tool.
Novel Human-like Influenza A viruses circulate in swine in Mexico and Chile
Overall, our findings indicate that at least 12 genetically distinct HA lineages circulate in Latin American swine herds, only two of which have been found in North American swine herds.