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1. Comparative clinico-pathological assessment of velogenic (sub-genotype VIIi) and mesogenic (sub-genotype VIm) Avian avulavirus 1 in chickens and pigeons

Author:
Aziz-ul-Rahman,; Rohaim, Mohammed A.; El Naggar, Rania F.; Mustafa, Ghulam; Chaudhry, Umer; Shabbir, Muhammad Zubair
Source:
Avian pathology 2019 v.48 no.6 pp. 610-621
ISSN:
1465-3338
Subject:
Newcastle disease; animal organs; animal viruses; broiler chickens; cloaca; disease control; feral animals; genomics; monitoring; mortality; pathotypes; pigeons; subgenotype; tissue tropism; tissues; viral shedding; virulence; wild birds
Abstract:
... Newcastle disease (ND), caused by virulent Avian avulavirus 1 (AAvV 1), affects a wide range of avian species worldwide. Recently, several AAvVs of diverse genotypes have emerged with varying genomic and residue substitutions, and subsequent clinical impact on susceptible avian species. We assessed the clinico-pathological influence of two different AAvV 1 pathotypes [wild bird originated-velogeni ...
DOI:
10.1080/03079457.2019.1648751

2. Investigation of suspected Newcastle disease (ND) outbreaks in Egypt uncovers a high virus velogenic ND virus burden in small-scale holdings and the presence of multiple pathogens

Author:
Moharam, Ibrahim; Razik, Alaa Abd el; Sultan, Hesham; Ghezlan, Mohammed; Meseko, Clement; Franzke, Kati; Harder, Timm; Beer, Martin; Grund, Christian
Source:
Avian pathology 2019 v.48 no.5 pp. 406-415
ISSN:
1465-3338
Subject:
Avian orthoavulavirus 1; Infectious bronchitis virus; Influenza A virus; Newcastle disease; animal viruses; birds; cell culture; diagnostic techniques; distress; farms; genes; mixed infection; mortality; pathotypes; phylogeny; poultry; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; signs and symptoms (animals and humans); vaccination; vaccines; viral load; virulence; virus transmission; viruses; Egypt
Abstract:
... Highly contagious Newcastle disease (ND) is associated with devastating outbreaks with highly variable clinical signs among gallinaceous birds. In this study we aimed to verify clinical ND suspicions in poultry holdings in Egypt suffering from respiratory distress and elevated mortality, comparing two groups of ND-vaccinated poultry holdings in three governorates. Besides testing for Newcastle dis ...
DOI:
10.1080/03079457.2019.1612852

3. 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

4. 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