Immunopotentiating effect of lentinan on chicks and its inhibitory effect on Marek's disease virus infection

Gao, Qiming; Li, Shun; Sun, Wanli; Yan, Hongjian; Wang, Yixin; Chang, Shuang; Zhao, Peng

doi:10.1016/j.psj.2024.103840

Poultry Science

2024

DOI: 10.1016/j.psj.2024.103840

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Immunopotentiating effect of lentinan on chicks and its inhibitory effect on Marek's disease virus infection

Qiming Gao,

Shun Li,

Wanli Sun

et al.

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2024

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Cited by 2 publications

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Application of lentinan in suppression of Marek's disease virus infection

Gao,

Zhu,

Sun

et al. 2024

Poultry Science

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Application of lentinan in suppression of Marek's disease virus infection

Gao,

Zhu,

Sun

et al. 2024

Poultry Science

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Onset and long-term duration of immunity provided by a single vaccination with recombinant a Marek’s disease virus with REV-LTR insertion

Dai,

Song,

Tan

et al. 2024

Front. Vet. Sci.

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Marek’s Disease (MD), caused by Marek’s disease virus (MDV), is a highly contagious lymphoproliferative disease in poultry. Despite the fact that MD has been effectively controlled by vaccines, the virulence of field isolates of MDV has continued to evolve, becoming more virulent under the immune pressure of vaccines. Our previous research has confirmed that the recombinant rMDV strain with REV-LTR insertion can be used as a live attenuated vaccine candidate. The aim of this research was to evaluate the onset and duration of immunity of the rMDV strain through two experiments. In both experiments, 1-day-old SPF chickens were vaccinated subcutaneously with the rMDV strain at a dose of 3,000 Plaque Formation Unit (PFU) per chick in 0.2 mL of the MD diluent. Then, in Experimental design 1, the chicks in the groups Vac-3d/CC-3d, Vac-5d/CC-5d, and Vac-7d/CC-7d were challenged separately with 500 PFU vvMDV strain MD5 at 3 days, 5 days, and 7 days after vaccination; in Experimental design 2, the chicks in group Vac-60d/CC-60d, Vac-120d/CC-120d, and Vac-180d/CC-180d were challenged at 60 days, 120 days, and 180 days after vaccination. The clinical symptoms and weight gain of chickens in each group were observed and recorded. The results showed that the rMDV strain with REV-LTR insertion provides protection starting from 3 days of age and achieves good immune effects at 5 days of age after 1-day-old immunization, and the immunization duration can reach for at least 180 days. Given age-related resistance, it can be confirmed that our vaccine can actually provide lifelong immunity. This study provides valuable insights into the onset and duration of immunity of the rMDV strain, which will provide a basis for the development and improvement of MD vaccines.

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Immunopotentiating effect of lentinan on chicks and its inhibitory effect on Marek's disease virus infection

Cited by 2 publications

References 34 publications

Application of lentinan in suppression of Marek's disease virus infection

Application of lentinan in suppression of Marek's disease virus infection

Onset and long-term duration of immunity provided by a single vaccination with recombinant a Marek’s disease virus with REV-LTR insertion

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