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Clinical and Diagnostic Laboratory Immunology, March 1998, p. 259-262, Vol. 5, No. 2
1071-412X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Evaluation of an Enzyme-Linked Immunosorbent Assay Using Recombinant Major Surface Protein 5 for Serological Diagnosis of Bovine Anaplasmosis in Venezuela

Armando Reyna-Bello,1,2 Axel Cloeckaert,1 Nieves Vizcaíno,1,dagger Mary I. Gonzatti,3 Pedro M. Aso,3 Gérard Dubray,1 and Michel S. Zygmunt1,*

Laboratoire de Pathologie Infectieuse et Immunologie, Institut National de la Recherche Agronomique, 37380 Nouzilly, France,1 and Laboratorio de Biología Experimental, Centro de Estudios Biomédicos y Veterinarios, Universidad Simón Rodríguez, Caracas 1010,2 and Laboratorio de Hemoparásitos, Departamento de Biología Celular, Universidad Simón Bolívar, Sartenejas,3 Venezuela

Received 14 July 1997/Returned for modification 2 October 1997/Accepted 8 December 1997

An indirect enzyme-linked immunosorbent assay (ELISA) was developed for the serological diagnosis of bovine anaplasmosis with purified recombinant major surface protein 5 (MSP5) of Anaplasma marginale produced in Escherichia coli. Serum antibody responses against MSP5 were detected in calves experimentally infected with A. marginale as early as 21 days postinfection and reached maximum titers at 28 days postinfection. The MSP5 ELISA performed with serum samples taken from field cattle from different regions of Venezuela showed a seroprevalence of 47%, which seems to be in accordance with the reported epidemiological status of bovine anaplasmosis in Venezuela. Positive results obtained in the MSP5 ELISA were further confirmed by immunoblotting, with the recombinant MSP5 as the antigen. Thus, these results confirmed the importance of MSP5 as a suitable antigen for the serological diagnosis of bovine anaplasmosis.

* Corresponding author. Mailing address: Laboratoire de Pathologie Infectieuse et Immunologie, INRA, 37380 Nouzilly, France. Phone: 33 2 47 42 78 67. Fax: 33 2 47 42 77 79. E-mail: zygmunt{at}tours.inra.fr.

dagger Present address: Dpto. Microbiología y Genética, Edificio Departamental, Universidad de Salamanca, Avda. Campo Charro s/n, 37007 Salamanca, Spain.

Clinical and Diagnostic Laboratory Immunology, March 1998, p. 259-262, Vol. 5, No. 2
1071-412X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.




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