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Turkey rhinotracheitis (TRT) is an acute infectious and contagious avian disease found all over the world. It is caused by avian pneumovirus (APV), which has two superficial glicoproteins: G and F, that are the main antigen determinants. Examinations of the nucleotide sequence in the G protein coding gene found in TRT virus isolates allowed to distinguish two subgroups - A and B. Both viral subgroups...
An outbreak of infectious thinitis and tracheitis in the flock of heavy turkeys not vaccinated agains this disease was described. The flock consisted of 2007 female and 170 male turkeys aged 45 weeks. In the course of the disease 2.06 per cent of the turkeys died and 20.5 per cent were rejected as defective due to ovaria falling and changes in the lungs. The drop in egg laying and hatching was 48...
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