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dc.contributor.author
Novoa, María Belén  
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Valentini, Beatriz Susana  
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Sarli, Macarena  
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Torioni de Echaide, Susana Marta  
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Primo, Maria Evangelina  
dc.contributor.author
Echaide, Ignacio Eduardo  
dc.date.available
2022-10-26T14:57:37Z  
dc.date.issued
2020-04  
dc.identifier.citation
Novoa, María Belén; Valentini, Beatriz Susana; Sarli, Macarena; Torioni de Echaide, Susana Marta; Primo, Maria Evangelina; et al.; Evaluation of a competitive inhibition ELISA based on the recombinant protein tSAG1 to detect anti–Neospora caninum antibodies in cattle; American Association of Veterinary Laboratory Diagnosticians; Journal of Veterinary Diagnostic Investigation; 32; 3; 4-2020; 401-408  
dc.identifier.issn
1040-6387  
dc.identifier.uri
http://hdl.handle.net/11336/174945  
dc.description.abstract
Neospora caninum is a protozoan parasite that causes abortion and important economic losses in cattle worldwide. There are no treatments or vaccines available; disease control is based on diagnosis and herd management strategies. We developed, validated, and evaluated under field conditions a competitive inhibition ELISA based on the truncated SAG1 protein (tSAG1), expressed in Escherichia coli, and the RafNeo5 monoclonal antibody (ciELISAtSAG1). A criterion based on the 3-y sequential serologic analysis of 230 dairy cows by IFAT was used as the gold standard. The assay was validated using 860 serum samples from cows that were consistently positive or negative by IFAT throughout the study period. ciELISAtSAG1 was then used to evaluate the prevalence of neosporosis in 16 beef cow herds (22 samples per herd, 352 total samples). The results were compared with those from IFAT and a commercial cELISA (cELISAVMRD). The ciELISAtSAG1 cutoff was ≥ 29%I, with a diagnostic sensitivity of 98.7% (95% CI = 96.8–99.7%) and a diagnostic specificity of 97.9% (95% CI = 96.4–99.0%). Concordance among IFAT, cELISAVMRD, and ciELISAtSAG1 was 90.3%. The agreement (κ) between ciELISAtSAG1 and the other 2 tests was ≥ 0.81. The overall prevalence of neosporosis in the 16 beef herds was 30% (range: 5–60%). The ciELISAtSAG1 could be useful for large-scale detection of anti–N. caninum antibodies in cattle and seroepidemiologic investigations, given its appropriate sensitivity and specificity, and the simplicity of production.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
American Association of Veterinary Laboratory Diagnosticians  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
CATTLE  
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COMPETITIVE INHIBITION ELISA  
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DIAGNOSIS  
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NEOSPOROSIS  
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PREVALENCE  
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SAG1  
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SEROLOGY  
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VALIDATION  
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Ciencias Veterinarias  
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Ciencias Veterinarias  
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CIENCIAS AGRÍCOLAS  
dc.title
Evaluation of a competitive inhibition ELISA based on the recombinant protein tSAG1 to detect anti–Neospora caninum antibodies in cattle  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2022-09-22T15:21:12Z  
dc.journal.volume
32  
dc.journal.number
3  
dc.journal.pagination
401-408  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
California  
dc.description.fil
Fil: Novoa, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina  
dc.description.fil
Fil: Valentini, Beatriz Susana. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina  
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Fil: Sarli, Macarena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina  
dc.description.fil
Fil: Torioni de Echaide, Susana Marta. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina  
dc.description.fil
Fil: Primo, Maria Evangelina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina  
dc.description.fil
Fil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina  
dc.journal.title
Journal of Veterinary Diagnostic Investigation  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journals.sagepub.com/doi/10.1177/1040638720916711  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1177/1040638720916711