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1. An avian influenza virus H6N1 outbreak in commercial layers: case report and reproduction of the disease

Author:
Landman, W. J. M.; Germeraad, E. A.; Kense, M. J.
Source:
Avian pathology 2019 v.48 no.2 pp. 98-110
ISSN:
1465-3338
Subject:
Influenza A virus; Mycoplasma gallisepticum; Newcastle disease; avian influenza; bacterial infections; case studies; decolorization; drugs; egg drop syndrome; egg production; egg shell; eggs; farms; flocks; hens; infectious bronchitis; intravenous injection; mortality; necropsy; nicarbazin; pathogenicity; viruses; Netherlands
Abstract:
... An outbreak of low pathogenic avian influenza (LPAI) subtype H6N1 (intravenous pathogenicity index = 0.11) infection occurred in four productive brown layer flocks on three farms in the Netherlands within a period of two months. The farms were located at a maximum distance of 4.6 km from each other. The infections were associated with egg production drops up to 74%, pale eggshells and persisting h ...
DOI:
10.1080/03079457.2018.1551612

2. Recombinant Newcastle disease virus (NDV) La Sota expressing the haemagglutinin–neuraminidase protein of genotype VII NDV shows improved protection efficacy against NDV challenge

Author:
Bu, Ya-wen; Yang, Hui-ming; Jin, Ji-hui; Zhao, Jing; Xue, Jia; Zhang, Guo-zhong
Source:
Avian pathology 2019 v.48 no.2 pp. 91-97
ISSN:
1465-3338
Subject:
chickens; Newcastle disease; specific pathogen-free animals; chicken eggs; morbidity; vaccines; Avian orthoavulavirus 1; viruses; genotype; reverse genetics; vaccination; death; virulence; mortality
Abstract:
... Intensive vaccination strategies against Newcastle disease (ND) have been implemented in many countries for a long time, but ND outbreaks still occur frequently, with most isolates belonging to genotype VII of Newcastle disease virus (NDV). Many researchers have revealed that vaccines closely matched to epidemic viruses provide better protection. Therefore, using a previously established reverse g ...
DOI:
10.1080/03079457.2018.1548754