Patent ID: 7288621

Claim:
A composition comprising a pharmaceutically acceptable vehicle and an immunogenic C. parvum polypeptide selected from the group consisting of (a) a polypeptide comprising the amino acid sequence of SEQ ID NO:2, or an immunogenic fragment thereof comprising at least 15 amino acids and that elicits an equivalent or enhanced immunological response as compared to the polypeptide comprising the sequence of SEQ ID NO:2, wherein the immunological response comprises the ability to elicit the production of neutralizing antibodies against C. parvum , and (b) a polypeptide with at least 90% sequence identity to a polypeptide comprising the amino acid sequence of SEQ ID NO:2 and that elicits an equivalent or enhanced immunological response as compared thereto, wherein the immunological response comprises the ability to elicit the production of neutralizing antibodies against C. parvum.