Vaccines
AssigneeBritish Technology Group Limited
InventorsVincent McDonald, Martin Shirley
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Abstract
Vaccines active against coccidiosis in domestic fowls contain attenuated precocious strains of Eimeria species.
Claims21
An attenuated anticoccidial vaccine containing live attenuated precocious lines of Eimeria acervulina, Eimeria maxima and Eimeria tenella, the number of sporulated oocysts of each separate Eimeria line present per 100 sporulated oocysts of Eimeria acervulina being for Eimeria maxima 15-30 and for Eimeria tenella 70-110.
A live vaccine for use in combatting coccidiosis in chickens comprising an effective concentration of live sporulated oocysts of a strain of Eimeria acervulina having a prepatent time in chickens between 60 and 84 hours, of a strain of Eimeria maxima having a prepatent time in chickens of between 80 and 120 hours and of a strain of Eimeria tenella having a prepatent time in chickens between 90 and 125 hours.
An attenuated precocious Eimeria strain selected from
- E. acervulina
- ECACC 86072203
- E. brunetti
- ECACC 86072204
- E. brunetti
- ECACC 86112013
- E. maxima
- ECACC 86112011
- E. maxima
- ECACC 86112012
- E. mitis
- ECACC 86072206
- E. necatrix
- ECACC 86072202
- E. praecox
- ECACC 86072205
- E. tenella
- ECACC 86072201
- and precocious attenuated immunogenic mutants and variants thereof.
Dependencies are inferred from the claim text.