Affiliation: | 1. 32 The Street, Tongham, Farnham, Surrey GU10 1DH, UK;2. Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise ‘G. Caporale’, Via Campo Boario, 64100 Teramo, Italy;3. Statens Veterinärmedinska Anstalt, Upsalla, Sweden;4. Department of Agriculture for Northern Ireland, Veterinary Sciences Division, Stoney Road, Stormont, Belfast BT4 3SD, Northern Ireland, UK;5. Laboratório Nacional de Investigação Veterinária, Estrada de Benfica 701, 1549-011 Lisbon, Portugal |