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Related Experiment Videos

Immunization against psittacine pox.

R W Winterfield, S L Clubb, D Schrader

    Avian Diseases
    |July 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    A psittacine pox virus vaccine proved effective in love birds, providing immunity against virulent strains. However, early post-vaccination contact allowed virus spread, highlighting the need for high vaccine titers.

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    Area of Science:

    • Avian Virology
    • Veterinary Immunology
    • Vaccinology

    Background:

    • Psittacine pox virus poses a significant threat to avian populations.
    • Effective vaccines are crucial for controlling avian pox outbreaks.
    • Love birds (Agapornis roseicollis) are susceptible to psittacine pox.

    Purpose of the Study:

    • To evaluate the efficacy of a psittacine pox virus vaccine in love birds.
    • To assess the transmission dynamics of the vaccine virus.
    • To determine the optimal timing for introducing susceptible birds to vaccinated individuals.

    Main Methods:

    • A psittacine pox virus isolate was used to develop a vaccine.
    • The vaccine was administered via wing-web puncture using single- and double-needle applicators.

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  • Vaccinated and unvaccinated birds were challenged with virulent psittacine pox virus.
  • Contact transmission studies were performed at different time points post-vaccination.

    • Main Results:

    • The vaccine conferred effective immunity against virulent psittacine pox virus challenge.
    • Virus spread was observed when unvaccinated birds were in immediate contact with newly vaccinated birds.
    • Susceptible birds introduced 27 days post-vaccination remained uninfected for 11 weeks.
    • A high vaccine virus titer was found to be important for efficacy.

    Conclusions:

    • The psittacine pox virus vaccine is a promising tool for protecting love birds.
    • Careful management of contact between vaccinated and unvaccinated birds is necessary post-vaccination.
    • Vaccine virus titer is a critical factor influencing vaccine performance and transmission control.