This is a short preview of the document. Infectious laryngotracheitis virus (ILTV) is an alphaherpesvirus that causes severe and economically significant respiratory disease in poultry worldwide. This is a short preview of the document. 1) Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University 2) vaxxinova Japan K.K. Two different regions of the infected cell protein 4 (ICP4) gene of infectious laryngotracheitis virus (ILTV) were amplified and sequenced for characterization of field isolates and tissue culture-origin (TCO) and chicken embryo-origin (CEO) vaccine strains. The deletion of the thymidine kinase (TK) gene of herpesviruses causes a reduction in their virulence. Live attenuated vaccines have been extensively used to control infectious laryngotracheitis (ILT).
Infectious laryngotracheitis (ILT) is a viral disease of chickens distributed worldwide and characterised by respiratory signs and decreased egg production and/or decreased weight gain. Infectious laryngotracheitis virus (ILTV), an alphaherpesvirus, causes respiratory disease in chickens and is commonly controlled by vaccination with conventionally attenuated virus strains. The aim of this study was to investigate the common occurrence of reticuloendotheliosis virus (REV) among Gallid herpesvirus 2 (GaHV-2) infected chickens. This is a short preview of the document. A recombinant fowlpox virus (rFPV) coexpressing the Newcastle disease virus (NDV) fusion and hemagglutinin-neuraminidase genes and infectious laryngothracheitis virus (ILTV) glycoprotein B gene was constructed. Marek’s disease (MD) is a lymphoproliferative disease of chickens caused by the oncogenic Gallid herpesvirus 2, commonly known as Marek’s disease virus (MDV). The CVI988/Rispens strain of MDV was used as the vector for the construction of the recombinant virus, and the virulent RB1B strain of MDV was used as the challenge virus.
The intensification of the poultry industry over the last 60 years facilitated the evolution of increased virulence and vaccine breaks in Marek’s disease virus (MDV-1). Abstract A six-month-old female turkey from a commercial growing unit was evaluated at postmortem examination for investigation of suspected viral lymphoproliferative disease. The H5 hemagglutinin (HA) gene of a highly pathogenic avian influenza virus (AIV) isolate (A/chicken/Italy/8/98) was cloned and sequenced, and inserted at the non-essential UL50 (dUTPase) gene locus of a virulent strain of infectious laryngotracheitis virus (ILTV). A broiler farm in North Alabama suffered a mild infectious laryngotracheitis (ILT) outbreak, as determined by clinical disease and PCR. Infectious laryngotracheitis is a highly contagious disease of chickens responsible for significant economic losses for the poultry industry worldwide. Figure 1. Posted by RJG on January 15th, 2014 • Reticuloendotheliosis virus in Marek’s disease vaccine.
Restriction enzyme linkage maps were produced for the genomic short region of the virulent infectious laryngotracheitis virus (CSW-1 strain). Infectious laryngotracheitis (ILT) is a highly contagious respiratory disease of chickens caused by infectious laryngotracheitis virus (ILTV). Chickens are the most important natural host for Marek’s disease virus, a highly cell-associated but readily transmitted alphaherpesvirus with lymphotropic properties of gammaherpesviruses. Copyright © 2011 Lorraine P. A possible interference after Marek’s disease (MD) vaccination using an experimental bivalent vaccine, consisting of a redesigned CVI-988/Rispens-type MDV-1 strain and herpesvirus of turkeys, with vaccination against infectious bronchitis (IB) virus (IBV) or Newcastle disease (ND) virus (NDV) was examined. Infectious Laryngotracheitis (ILT) is an acute respiratory tract infection of chickens, caused by the Laryngotracheitis Virus (LTV). Marek’s disease virus (MDV; also known as Gallid herpesvirus 2, MDV-1) causes oncogenic disease in chickens producing clinical signs that include lymphomas, visceral tumours, nerve lesions, and immunosuppression.
Quality control of biologicals for veterinary use includes certification of freedom from extraneous agents. Attenuated vaccine strains of the alphaherpesvirus causing infectious laryngotracheitis of chickens (ILTV, gallid herpesvirus 1) can be used for mass application. Probably the most effective current vaccine against Marek’s disease is the live Rispens (CVI988) attenuated serotype 1 Marek’s disease virus (MDV). This is a short preview of the document. Genomic sequencing using the SOLiD™ system generated 526.69 Mb of sequence and 12,046,726 reads. Tracheal organ culture (TOC) techniques utilising multiple-well plastic trays were used to detect and assay latent infection established by infectious laryngotracheitis (ILT) herpesvirus in clinically normal chickens. This is a short preview of the document.
We previously reported that deletion of the Meq gene from the oncogenic rMd5 virus rendered it apathogenic for chickens. A polymerase chain reaction (PCR) test based on primers flanking the 132 bp tandem repeat in pathogenic MDV-1 DNA was developed. An enzyme-linked immunosorbent assay (ELISA) was applied to evaluate the antibody response of commercial White Leghorn chickens to vaccination against Marek’s disease (MD) at hatch (day 0) with serotype-1 (Rispens), -2 (SB-1), or -3 (turkey herpesvirus, HVT) vaccine virus and to challenge on day 21 with MD virus. Viral vector vaccines using fowl poxvirus (FPV) and herpesvirus of turkey (HVT) as vectors and carrying infectious laryngotracheitis virus (ILTV) genes are commercially available to the poultry industry in the USA. 1. Andreasen Jr, J. Infectious laryngotracheitis (ILT) is an upper respiratory tract disease in chickens caused by infectious laryngotracheitis virus (ILTV), an alphaherpesvirus.