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Durr PA, Indriani R, Selleck P, et al. Developing Farm-Level Post-vaccination Sero-Monitoring Systems for H5N1 Highly Pathogenic Avian Influenza in an Endemically Infected Country. Front Vet Sci. 2019;5:324doi: 10.3389/fvets.2018.00324.
Durr, P. A., Indriani, R., Selleck, P., Adjid, A. R. M., Syafriati, T., & Ignjatovic, J. (2018). Developing Farm-Level Post-vaccination Sero-Monitoring Systems for H5N1 Highly Pathogenic Avian Influenza in an Endemically Infected Country. Frontiers in veterinary science, 5324. https://doi.org/10.3389/fvets.2018.00324
Durr, Peter A, et al. "Developing Farm-Level Post-vaccination Sero-Monitoring Systems for H5N1 Highly Pathogenic Avian Influenza in an Endemically Infected Country." Frontiers in veterinary science vol. 5 (2018): 324. doi: https://doi.org/10.3389/fvets.2018.00324
Durr PA, Indriani R, Selleck P, Adjid ARM, Syafriati T, Ignjatovic J. Developing Farm-Level Post-vaccination Sero-Monitoring Systems for H5N1 Highly Pathogenic Avian Influenza in an Endemically Infected Country. Front Vet Sci. 2019 Jan 08;5:324. doi: 10.3389/fvets.2018.00324. eCollection 2018. PMID: 30671438; PMCID: PMC6331391.
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Front Vet Sci. 2019 Jan 08;5:324. doi: 10.3389/fvets.2018.00324. eCollection 2018.

Developing Farm-Level Post-vaccination Sero-Monitoring Systems for H5N1 Highly Pathogenic Avian Influenza in an Endemically Infected Country.

Frontiers in veterinary science

Peter A Durr, Risa Indriani, Paul Selleck, Abdul R M Adjid, Tatty Syafriati, Jagoda Ignjatovic

Affiliations

  1. CSIRO-Australian Animal Health Laboratory, Geelong, VIC, Australia.
  2. Indonesian Research Centre for Veterinary Sciences, Bogor, Indonesia.
  3. Faculty of Veterinary Science, University of Melbourne, Melbourne, VIC, Australia.

PMID: 30671438 PMCID: PMC6331391 DOI: 10.3389/fvets.2018.00324

Abstract

Whilst the serological responses of poultry following vaccination against highly pathogenic avian influenza H5N1 has been extensively investigated under laboratory conditions, there have been fewer studies conducted in the field. This applies particularly to the endemically infected countries routinely practicing vaccination, where the combination of multiple circulating clades and/or the use of vaccines with different seed strains makes the design and interpretation of field studies especially problematic. To address this for the particular situation of layer hens in the small to medium commercial sector in Indonesia, we developed a sampling regime before and after the vaccination given to point-of-lay pullets, and assessed serological response with a panel of test antigens. This confirmed that high titres were induced in those birds vaccinated with locally produced homologous H5N1 vaccines administered two or more times, but in flocks using imported heterologous H5N2 vaccines median titres were significantly lower, and unlikely to provide protection throughout the production cycle, without additional vaccination. Comparing the HI responses against the panel of antigens enabled the detection of the flock's exposure to different vaccine antigens, and made possible the detection of mislabelled vaccine seed strains. Furthermore, we show that test antigens need not be exactly matched to assess sero-protection in well vaccinated birds. Finally our study suggests that the POL vaccination serves as a useful reference point for following cohorts of layers throughout their production cycle, and thus enabling robust vaccination field effectiveness studies.

Keywords: avian influenza vaccines; avian influenza virus subtype H5N1; haemagglutination inhibition test; highly pathogenic avian influenza; poultry vaccination

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