2026-04-17T17:01:54Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/6692025-10-22T11:05:12Zcom_2072_4428com_2072_4427col_2072_487898
RECERCAT
author
Díaz, Ivan
author
Genís-Jorquera, Blanca
author
Martín-Valls, Gerard E.
author
Mateu, Enric
other
Producció Animal
group
Sanitat Animal
2025-10-22T11:05:12Z
2025-10-22T11:05:12Z
2019-10-01
Díaz, Ivan, Blanca Genís-Jorquera, Gerard E Martín-Valls, and Enric Mateu. 2019. "Using Commercial Elisas To Assess Humoral Response In Sows Repeatedly Vaccinated With Modified Live Porcine Reproductive And Respiratory Syndrome Virus". Veterinary Record 186 (4): 123-123. BMJ. doi:10.1136/vr.105432.
0042-4900
http://hdl.handle.net/20.500.12327/669
http://dx.doi.org/10.1136/vr.105432
Background Sows in breeding herds are often mass vaccinated against porcine reproductive and respiratory syndrome (PRRS) every few months using modified live vaccines (MLV). Field veterinarians repeatedly report that multiple vaccinated sows test negative in ELISA. Obviously, this creates uncertainty when assessing the compliance of vaccination and the status of sows.
Methods In the present study, four commercial ELISAs were used to assess the serological PRRS status in gilts and sows of three farms that were PRRS MLV vaccinated every four months. Animals were tested before vaccination (BV) and postvaccination (PV). Total and neutralising antibodies and cell-mediated responses were also measured in animals that yielded negative results in all ELISAs.
Results The proportion of seronegative animals BV varied depending on the farm and the ELISA used. When samples were analysed using only one ELISA, a substantial number of negative results obtained BV remained as negative afterwards. Five animals were negative BV and PV with all the examined ELISAs. Those animals also yielded negative results in all the other immunological assays.
Conclusion Our findings suggest that the use of ELISA for monitoring multiple PRRS MLV vaccinated sows is very limited due to the variability of the humoral responses and the moderate agreement between tests.
eng
Attribution-NonCommercial 4.0 International
Using commercial ELISAs to assess humoral response in sows repeatedly vaccinated with modified live porcine reproductive and respiratory syndrome virus
info:eu-repo/semantics/article