Vaccine for porcine post-weaning diarrhea caused by...

Drug – bio-affecting and body treating compositions – Whole live micro-organism – cell – or virus containing – Genetically modified micro-organism – cell – or virus

Reexamination Certificate

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C435S252330

Reexamination Certificate

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07927586

ABSTRACT:
Vaccines and methods for making and using the same. An example vaccine may be a vaccine against enterotoxigenicEscherichia coli. The vaccine may include anEscherichia colistrain. TheEscherichia colistrain may produce K88 fimbria and a fusion protein including a mutant LT enterotoxin linked with a STb enterotoxin. An example method for producing a vaccine for porcine post-weaning diarrhea may include providing a first strain ofEscherichia coli. The strain may include the eltAB gene and the estB gene. The method may also include amplifying the eltAB gene, mutating the eltAB gene, generating a genetic fusion of the mutant eltAB gene with the estB gene, and transforming a second strain ofEscherichia coliwith the genetic fusion.

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