title: Development and evaluation of a recombinant CP23 antigen-based ELISA for serodiagnosis of Cryptosporidium parvum.
abstract: The CP23 gene of Cryptosporidium parvum strain isolated from Changchun in China was expressed in Escherichia coli BL21 strain and was purified as a recombinant protein. An indirect ELISA assay (CP23-ELISA) for antibody detection was established using the purified recombinant CP23 protein. Antigen coating conditions and serum dilution for the CP23-ELISA were optimized. The S/P ratio of the absorbency value was calculated in the CP23-ELISA to evaluate the serum antibody level of the field cow samples. It indicated that the CP23-ELISA assay, which was more convenient and easier to prepare than traditional methods, was a good candidate for evaluation of C. parvum exposure to domestic animal in field.
authors.affiliation: National Research Center for Wildlife Borne Diseases, Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, PR China.
authors.forename: Chengmin
authors.initials: C
authors.lastname: Wang
authors.forename: Hongxuan
authors.initials: H
authors.lastname: He
authors.forename: Mingxing
authors.initials: M
authors.lastname: Duan
mesh_terms: D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood* / Q000276:immunology; D000953:Antigens, Protozoan / Q000276:immunology / Q000302:isolation & purification; D015153:Blotting, Western / Q000662:veterinary; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis* / Q000276:immunology / Q000469:parasitology; D003457:Cryptosporidiosis / Q000175:diagnosis / Q000469:parasitology / Q000662:veterinary*; D016785:Cryptosporidium parvum / Q000276:immunology* / Q000302:isolation & purification; D004591:Electrophoresis, Polyacrylamide Gel / Q000662:veterinary; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods / Q000592:standards / Q000662:veterinary*; D005243:Feces / Q000469:parasitology; D051379:Mice; D008807:Mice, Inbred BALB C; D011994:Recombinant Proteins / Q000276:immunology / Q000302:isolation & purification; D012680:Sensitivity and Specificity
chemical_list: D000909:Antibodies, Helminth; D000953:Antigens, Protozoan; D011994:Recombinant Proteins