An alternative method for the establishment of virulence of Newcastle disease virus isolates
Charlotte Enastacia Boucher*, Robert Richard Bragg and Jacobus Albertyn
Department of Microbial, Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Science, University of the Free State, P. O. Box 339, Bloemfontein, 9300, Republic of South Africa.
Email: [email protected]