Be Sure You Have The Right Strategy
Work with your herd's veterinarian to find the best vaccination strategy for your operation.
- Producing the negative weaned pig — Start addressing influenza at the top of the production system. Pre-wean pigs have been shown to harbor IAV-S and can carry it to the nursery after weaning.1
- Whole breeding herd vaccination — If animals continue to be chronically infected, this strategy helps shut down continuous viral shedding.2
- Pre-farrow vaccination — This strategy can help protect newborn piglets by increasing influenza maternally derived antibodies (MDA) transferred from the mother after colostrum intake.3
- Gilt vaccination — Immunizing incoming gilts is critical to maintaining stability in the sow herd.
Producing The Negative Weaned Pig
While pigs of all ages can be infected by IAV-S, weaning-age pigs are an important subpopulation for infection.1
Pre-farrowing vaccination is a studied strategy that:
- Helps protect suckling and growing pigs from IAV-S.2
- Induces maternal antibodies in piglets, helping provide them with early immunity.2
- Pre-wean pigs have been shown to harbor IAV-S and can carry it to the nursery after weaning.4
- In a 2,000-sow farrow-to-wean farm, up to 63% of pigs* were infected with IAV-S at weaning even though there was no detectable disease in breeding-age pigs.5
- IAV-S mantained longer than expected in growing pig populations, for up to 70 days in a finisher pig population.4
*Aged 11 days and older
Whole Breeding Herd Vaccination
Whole herd or mass vaccination is a common strategy on many U.S. farms, along with pre-farrow and pre-breeding vaccination.2
A whole breeding herd vaccination strategy with FluSure XP®:
- Might be the best strategy if animals continue to be chronically infected — it helps shut down continuous viral shedding2
- Should be administered as a two-dose blanket vaccination with semiannual revaccinations after the initial two doses2
- Must be accompanied by biosecurity control and isolation measures, as well as strategic gilt immunization and entry procedures2
Vaccines can help protect newborn piglets by increasing influenza maternally derived antibodies (MDA) transferred from the mother after colostrum intake.3
- Higher antibody titers were found in piglets born to sows vaccinated before farrowing compared with those of unvaccinated sows.2
- MDA can protect the piglet for eight to 10 weeks after birth.2
A pre-farrow vaccination strategy with FluSure XP:
- Helps decrease viral shedding at farrowing2
- Induces piglet maternal antibodies, helping strengthen early immunity2
- Should be administered as a single dose (as a booster in previously vaccinated animals) two to four weeks pre-farrowing2
- Helps provide higher levels of maternal antibodies when administered as a two-dose regimen2
Failure to properly vaccinate gilts can lead to ongoing circulation of influenza in the sow herd.
A gilt vaccination strategy with FluSure XP:
- Includes two doses of FluSure XP beginning at age 11 to 14 weeks
- Shots triggered three weeks apart
- Can be administered prior to breeding with FluSure XP/FarrowSure® GOLD or
FluSure XP/FarrowSure GOLD B
- Can be administered in combination with RespiSure®, RespiSure-ONE® or
ER Bac® Plus as part of complete gilt immunization protocol
- Allerson M, Torremorell M. Influenza virus prevalence and risk factors in weaning-age pigs, in Proceedings. Allen D. Leman Swine Conf 2013;40-97.
- Corzo CA, Gramer M, Kuhn M, Mohr M, Morrison R. Observations regarding influenza A virus shedding in a swine breeding farm after mass vaccination. J Swine Health Prod. 2012;20(6):283-289.
- Allerson M, Deen J, Detmer SE et al. The impact of maternally derived immunity on influenza A virus transmission in neonatal pig populations. Vaccine. 2013;31(3):500-505.Allerson M, Torremorell M. The epidemiology of influenza virus in sow farms: A case report, in Proceedings. Allen D. Leman Swine Conf 2010;172.
- Torremorell M. What should we do about flu?, in Proceedings. Allen D. Leman Swine Conf 2011;27-32.
- Allerson M, Torremorell M. The epidemiology of influenza virus in sow farms: A case report, in Proceedings. Allen D. Leman Swine Conf 2010;172.
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