Reciprocal Antibody and Complement Responses of Two Chicken Breeds to Vaccine Strains of Newcastle Disease Virus, Infectious Bursal Disease Virus and Infectious Bronchitis Virus

R. Baelmans, H.K. Parmentier, P. Dorny, F. Demey, D. Berkvens

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

Serum antibody responses and haemolytic complement activity were evaluated in White Leghorn (WLH) and Rhode Island Red (RIR) chickens that were vaccinated with live-attenuated vaccines of Newcastle disease virus, or infectious bronchitis virus, or infectious bursal disease virus by means of ocular challenge at 10 times the normal vaccination dose. Complement titres in non-vaccinated birds were significantly higher in WLH birds compared to RIR birds. The lentogenic viral infection resulted in an immediate stimulation of complement activity, followed by a decrease to initial complement levels within 2 weeks post vaccination, when the antibody response took over immune defence. As compared to WLH chickens, RIR birds mounted a faster and significantly higher antibody response to the vaccine viruses used. In WLH hens, significantly higher haemolytic complement activity post vaccination was found as compared to RIR hens. Possible consequences of the observed differences in immune responsiveness of the two breeds to viral vaccines are discussed.
Original languageEnglish
Pages (from-to)567-576
Number of pages10
JournalVeterinary Research Communications
Volume30
Issue number5
DOIs
Publication statusPublished - 2006

Keywords

  • mannan-binding lectin
  • red-blood-cells
  • indigenous chickens
  • viral-infections
  • serum-levels
  • evasion
  • lines
  • mbl

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