Method of protecting against chronic infections
OwnerEng-Hong Leeinventor
Life of this patent
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Abstract
The present invention is directed to a method of protecting an animal against a chronic disease, the disease being caused by an infectious organism which undergoes more than one life cycle. The method comprises: a) administering to the animal a vaccine containing sufficient organisms to develop an immunological response in the animal; b) maintaining the animal free from chemotherapeutic agents effective against the infectious organism for a period of time corresponding to about one life cycle of the organism; and c) thereafter administering to the animal a chemotherapeutic agent effective against the infectious organism for a period of time corresponding to at least one life cycle of the infectious organism.
Claims16
A method of protecting poultry birds against coccidiosis comprising:
- a) administering to the bird a vaccine containing sufficient live oocysts of at least one Eimeria sp. to develop an immunological response in the bird;
- b) maintaining the bird free from chemotherapeutic agents effective against coccidiosis for a period of time corresponding to about one life cycle of the Eimeria sp.;
- and
- c) thereafter administering to the bird a chemotherapeutic agent effective against coccidiosis for a period of time corresponding to at least one life cycle of the Eimeria sp.
A method for protecting poultry birds against coccidiosis comprising:
- a) administering to a first flock of birds a vaccine containing sufficient live oocysts of at least one Eimeria sp. to develop an immunological response in the bird;
- b) maintaining the first flock of birds bird free from chemotherapeutic agents effective against coccidiosis for a period of time corresponding to about one life cycle of the Eimeria sp.;
- c) thereafter administering to the first flock of birds a chemotherapeutic agent effective against coccidiosis until about one week before the first flock of birds are marketed;
- d) repeating steps a) and b) above for each subsequent flock of birds followed by administration of the chemotherapeutic agent for a reduced period of time for each flock as compared to the immediately previous flock until the therapeutic agent is being administered to the flock of birds for a period of time corresponding to at least one life cycle of the Eimeria sp.;
- and
- e) thereafter maintaining each further flock of birds on the same program of immunization and medication.
Dependencies are inferred from the claim text.