Patents Assigned to Chilwalner
  • Vaccine comprising eimeria spp. gametocyte antigen
    Patent number: 5932225
    Abstract: Substantially purified Eimeria maxima gametocytes have been prepared and methods for their preparations are disclosed. A proteinaceous extract derived from the gametocytes comprises at least nine proteins of varying molecular weights. Vaccines for conferring upon a chicken immunity against infection comprise an effective immunizing amount of gametocyte extract or antigenic protein, and a carrier.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: August 3, 1999
    Assignee: Chilwalner
    Inventors: Michael Wallach, Thea Pugatsch, David Mencher
  • Method of reducing the output of Eimeria oocysts from a newborn chick
    Patent number: 5496550
    Abstract: This invention provides a method of reducing the output of Eimeria oocysts from a newborn chick which comprises administering to a laying hen at a suitable time prior to the hen laying a fertilized egg an amount of native or recombinant antigenic protein present in gametocytes of the Eimeria spp. effective to induce in the hen an immune response conferring protection via maternal immunity against infection or transmission by the Eimeria spp. in the offspring chick.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: March 5, 1996
    Assignee: Chilwalner
    Inventors: Michael Wallach, Thea Pugatsch, David Mencher