Fig. 2.
Clinical scores in groups of broilers after inoculation with vNDV or E. coli (O78) or a combination of both. Each respiratory clinical sign was scored by the following scale: 0, no sign; 1, mild or slight; 2, moderate; 3, severe.
Clinical scores in groups of broilers after inoculation with vNDV or E. coli (O78) or a combination of both. Each respiratory clinical sign was scored by the following scale: 0, no sign; 1, mild or slight; 2, moderate; 3, severe.