Article
On the origins and relationships of Newcastle disease virus vaccine strains Hertfordshire and Mukteswar, and virulent strain Herts'33.
Avian pathology : journal of the W.V.P.A - 1 Jun 2003
Czeglédi Alíz, Wehmann Enikö, Lomniczi B
Abstract excerpt
The origins and relationships of Newcastle disease virus (NDV) vaccine strains Hertfordshire (H) and Mukteswar, and the virulent Herts'33 were studied using partial sequence analysis of the fusion protein gene. The mesogenic strain H was obtained by egg passages of a field virus isolated in England in 1933 (later known as Herts'33). Different lines of the strain Herts'33, however, divided into two distinct...
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