scholarly journals Persistence of the tissue culture origin vaccine for infectious laryngotracheitis virus in commercial chicken flocks in Brazil

2015 ◽  
Vol 94 (11) ◽  
pp. 2608-2615 ◽  
Author(s):  
Silvana H. Santander Parra ◽  
Luis F. Nuñez ◽  
Claudete S. Astolfi-Ferreira ◽  
Antonio J. Piantino Ferreira
Keyword(s):  
Tissue Culture ◽  
Infectious Laryngotracheitis Virus ◽  
Commercial Chicken ◽  
Infectious Laryngotracheitis ◽  
Laryngotracheitis Virus

Infectivity for Chicken Embryos of Tissue-Culture-Modified Infectious Laryngotracheitis Virus

1982 ◽  
Vol 26 (2) ◽  
pp. 295
Author(s):  
Morimasa Yamanaka ◽  
Kazuhisa Hiramatsu ◽  
Satoshi Takemitsu ◽  
Masayuki Ajiki ◽  
Osamu Matsui ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Infectious Laryngotracheitis Virus ◽  
Chicken Embryos ◽  
Infectious Laryngotracheitis ◽  
Laryngotracheitis Virus

scholarly journals Molecular epidemiology of respiratory viruses in commercial chicken flocks in Pakistan from 2014 through to 2016

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Sajid Umar ◽  
Angélique Teillaud ◽  
Hassan Bin Aslam ◽  
Jean-Luc Guerin ◽  
Mariette F. Ducatez
Keyword(s):  
Respiratory Viruses ◽  
Control Measures ◽  
Economic Losses ◽  
Infectious Laryngotracheitis Virus ◽  
Respiratory Problems ◽  
Infectious Bronchitis ◽  
Commercial Chicken ◽  
Infectious Laryngotracheitis ◽  
Commercial Poultry ◽  
Laryngotracheitis Virus

Abstract Background Viral diseases are a matter of great concern for poultry farmers in Pakistan. Multiple common viral respiratory diseases (CVRDs) cause huge economic losses in the poultry industry. The prevalence of CVRDs in many countries, including Pakistan, is not clearly understood. Results Incidences of 5 chicken respiratory viruses: avian influenza virus (AIV), Newcastle disease virus (NDV/AAVV-1), infectious bronchitis virus (IBV), avian metapneumovirus (aMPV) and infectious laryngotracheitis virus (ILTV) were assessed on commercial Pakistani farms with respiratory problems from 2014 through to 2016. While AIV and AAVV-1 were frequently detected (16 to 17% of farms), IBV and aMPV were rarely detected (in 3 to 5% of farms) and ILTV was not detected. We characterized H9 AIV of the G1 lineage, genotype VII AAVV-1, GI-13 IBV, and type B aMPV strains with very little genetic variability in the 2-year study period. Co-infections with AIV and AAVV-1 were common and wild type AAVV-1 was detected despite the use of vaccines. Control measures to limit the virus burden in chicken flocks are discussed. Conclusions Our data shows that AIV (H9), AAVV-1, IBV and aMPV are prevalent in commercial poultry in Pakistan. Further studies are necessary to assess circulating strains, economic losses caused by infections and coinfections of these pathogens, and the costs and benefits of countermeasures. Furthermore, veterinarians and farmers should be informed of the pathogens circulating in the field and hence advised on the use of vaccines.

Cytoplasmic Tubules in Cells Infected with Laryngotracheitis Virus

1969 ◽  
Vol 27 ◽  
pp. 376-377
Author(s):  
A. M. Watrach
Keyword(s):  
Tissue Culture ◽  
Small Proportion ◽  
Chicken Embryo ◽  
Culture Cells ◽  
Tissue Culture Cells ◽  
Morphologic Characteristics ◽  
Infectious Laryngotracheitis ◽  
Laryngotracheitis Virus ◽  
In Cells

During a study of the development of infectious laryngotracheitis (LT) virus in tissue culture cells, unusual tubular formations were found in the cytoplasm of a small proportion of the affected cells. It is the purpose of this report to describe the morphologic characteristics of the tubules and to discuss their possible association with the development of virus.The source and maintenance of the strain of LT virus have been described. Prior to this study, the virus was passed several times in chicken embryo kidney (CEK) tissue culture cells.

Sign in / Sign up

Export Citation Format

Share Document