Vaccination of Broilers Against H5N1 Avian Influenza
Author Information
Author(s): Poetri Okti, Annemarie Bouma, Ivo Claassen, Guus Koch, Retno Soejoedono, Arjan Stegeman, Michiel van Boven
Primary Institution: Bogor Agricultural University
Hypothesis
Does a single vaccination of commercial broilers reduce the transmission of H5N1 highly pathogenic avian influenza?
Conclusion
Vaccination of broiler chickens does not significantly reduce the transmission of H5N1 virus.
Supporting Evidence
- Vaccination did not prevent the occurrence of clinical signs in broilers.
- Maternal immunity may interfere with the vaccine-induced immune response.
- The reproduction number remained above one, indicating potential for virus spread.
- Transmission was monitored through serological analysis and virus isolation.
- Broilers vaccinated at one or ten days of age still shed the virus.
Takeaway
The study found that giving one shot of vaccine to chickens doesn't stop the spread of a dangerous bird flu virus.
Methodology
Four experiments with 22 replicate trials each were conducted to assess the effect of vaccination on virus transmission.
Potential Biases
Potential bias due to the lack of a control group and the specific conditions of the experiments.
Limitations
The study did not include a control group of broilers without maternally derived antibodies.
Participant Demographics
Broiler chickens, including day-old chicks and four-week-old birds.
Statistical Information
P-Value
0.63
Confidence Interval
95%CrI: 0.17-0.72
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website