Results 101 to 110 of about 354 (118)

Detection of specific UL49 sequences of Marek's disease virus CVI988/Rispens strain using loop-mediated isothermal amplification

Journal of Virological Methods, 2015
Marek's disease (MD) is a tumoral disease of chickens that can be controlled by vaccines based on non-pathogenic strains of turkey herpesvirus (HVT), SB-1 strain belonging to serotype 2, or the attenuated CVI988/Rispens strain belonging to serotype 1 of Marek's disease virus (MDV).
Grzegorz Wozniakowski
exaly   +3 more sources

Characteristics of CVI988/Rispens and R2/23, Two Prototype Vaccine Strains of Serotype 1 Marek's Disease Virus

Avian Diseases, 1995
Studies were focused on two attenuated serotype 1 Marek's disease (MD) vaccine viruses, CVI988/Rispens (passage 42) and R2/23 (passage 105). Both serotype 1 vaccine viruses provided much higher levels of protection than the prototype MD vaccine, turkey herpesvirus (HVT); the best protection was generally provided by CVI988/Rispens when compared with ...
L F Lee, A M Fadly, R L Witter
exaly   +3 more sources

Differential quantification of cloned CVI988 vaccine strain and virulent RB-1B strain of Marek’s disease viruses in chicken tissues, using real-time PCR

Research in Veterinary Science, 2011
The 'gold standard' vaccine against Marek's disease in poultry is the CVI988/Rispens virus, which is not easily distinguishable, antigenically or genetically, from virulent Marek's disease herpesvirus. Accurate differential measurement of the CVI988 vaccine and virulent viruses is important to investigate mechanisms of vaccinal protection.
S J, Baigent, L P, Smith, L J, Petherbridge, V K, Nair   +3 more
exaly   +3 more sources

A Comparative Evaluation of the Protective Efficacy of rMd5ΔMeq and CVI988/Rispens Against a vv+ Strain of Marek's Disease Virus Infection in a Series of Recombinant Congenic Strains of White Leghorn Chickens

Avian Diseases, 2011
Marek's disease (MD) is a lymphoproliferative disease of domestic chickens caused by a highly infectious, oncogenic alpha-herpesvirus known as Marek's disease virus (MDV). MD is presently controlled by vaccination. Current MD vaccines include attenuated serotype 1 strains (e.g., CVI988/Rispens), avirulent serotype 2 (SB-1), and serotype 3 (HVT) MDV ...
Zhuang Ding, Jiuzhou Song, John Dunn
exaly   +3 more sources

Replication kinetics and shedding of very virulent Marek's disease virus and vaccinal Rispens/CVI988 virus during single and mixed infections varying in order and interval between infections

Veterinary Microbiology, 2014
Vaccination is thought to contribute to an evolution in virulence of the Marek's disease virus (MDV) as vaccines prevent disease but not infection. We investigated the effects of co-infections at various intervals between Rispens/CVI988 vaccine virus (Rispens) and very virulent MDV (vvMDV) on the replication and shedding of each virus.
Sithara Ralapanawe, Stephen Walkden-Brown, Tanzila Islam   +2 more
exaly   +3 more sources

Insertion of Reticuloendotheliosis Virus Long Terminal Repeat into the Genome of CVI988 Strain of Marek's Disease Virus Results in Enhanced Growth and Protection

Avian Diseases, 2013
Marek's disease (MD) is a lymphoproliferative disease of chickens caused by serotype 1 MD virus (MDV). Vaccination of commercial poultry has drastically reduced losses from MD, and the poultry industry cannot be sustained without the use of vaccines.
Sanjay Reddy, Blanca Lupiani, Richard Witter   +2 more
exaly   +3 more sources

Differentiation between pathogenic serotype 1 isolates of Marek's disease virus and the Rispens CVI988 vaccine in Australia using real-time PCR and high resolution melt curve analysis

Journal of Virological Methods, 2013
Two real-time PCR assays were developed which enable quantitation and differentiation between pathogenic Australian isolates of Marek's disease virus (MDV) serotype 1 and the serotype 1 vaccine strain Rispens CVI988. The assays are based on a DNA sequence variation in the meq gene between pathogenic and vaccinal MDV1 which has been confirmed by ...
Stephen Walkden-Brown, S W Walkden-Brown   +1 more
exaly   +3 more sources

Early Posthatch Protection against Marek's Disease in Chickens Vaccinated in ovo with a CVI988 Serotype 1 Vaccine

Avian Diseases, 2001
CVI988, a serotype 1 Marek's disease virus (MDV), was used as an in ovo vaccine in specific-pathogen-free chickens to determine if this virus induces early posthatch protection against Marek's disease as has been shown previously for turkey herpesvirus. MDV CVI988 was injected at embryonation day (ED) 17 (group 1) or at hatch (group 2).
Y, Zhang, J M, Sharma
openaire   +2 more sources

[Comparison of immunoprotection between vaccination with meq-deleted Marek's disease virus and vaccine strain CVI988/Rispens].

Wei sheng wu xue bao = Acta microbiologica Sinica, 2015
To evaluate and compare the immunoprotection between a meq-deleted Marek's disease virus (MDV) and CVI988/Rispens against MDV very virulent strain GX0101.In total 120 one-day-old SPF chickens were divided into 4 groups (30 each) and kept in 5 isolators with positive pressure-filtered air. At 1 day of age, 2000 PFU of SC9-1 was inoculated subcutaneously
Luntao, Duan, Shuai, Su, Yixin, Wang, Sifei, Li, Peng, Sun, Wenqing, Chen, Zhizhong, Cui   +6 more
openaire   +2 more sources

Influence of vaccination with CVI988/Rispens on load and replication of a very virulent Marek's disease virus strain in feathers of chickens

Avian Pathology, 2012
Several highly efficacious vaccines are currently available for control of Marek's disease, a lymphoproliferative disease in chickens. However, these vaccines are unable to prevent infection with Marek's disease virus (MDV) in vaccinated birds. This leads to shedding of virulent MDV from feather follicle epithelium and skin epithelial cells of ...
Kamran, Haq, Thomas, Fear, Abdelhakeem, Ibraheem, Mohamed Faizal, Abdul-Careem, Shayan, Sharif   +4 more
openaire   +2 more sources