The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1991
Filed:
Jul. 07, 1989
Applicant:
Inventors:
Jacob K Frenkel, Overland Park, KS (US);
Elmer R Pfefferkorn, Hanover, NH (US);
Assignees:
The University of Kansas, Lawrence, KS (US);
Darmouth College, Hanover, NH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; C12N / ;
U.S. Cl.
CPC ...
424 88 ; 424 93 ; 4351721 ; 435243 ; 435258 ;
Abstract
A new mutant strain vaccine, and a corresponding method of immunization, against Toxoplasma in cats is provided which makes use of a reproductively deficient strain of T.gondii, designated T-263. Bradyzoites in tissue cysts from laboratory animals infected with the mutant were fed to cats, which developed immunity against subsequent T.gondii challenge without concomitant shedding of infectious oocysts. The new vaccine eliminates the need for chemoprophylaxis subsequent to primary infection.