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Acta Parasitologica

, Volume 64, Issue 4, pp 745–752 | Cite as

Optimization of Immunization Procedure for Eimeria tenella DNA Vaccine pVAX1-pEtK2-IL-2 and Its Stability

  • Bucai Zhang
  • Cheng Yuan
  • Xiaokai Song
  • Lixin Xu
  • Ruofeng Yan
  • Muhammad Ali A. Shah
  • Changming Guo
  • Shanyuan Zhu
  • Xiangrui LiEmail author
Original Paper
  • 30 Downloads

Abstract

Purpose

To seek for the optimal immunization procedure of DNA vaccine pVAX1-pEtK2-IL-2 which was produced via cloning pEtK2 antigen gene of Eimeria tenella (E. tenella) and chicken IL-2 (chIL-2) gene into expression vector pVAX1.

Methods

The doses, routes, times of inoculation and ages of the first inoculation of chickens were optimized. The stability of the vaccine, including store temperature and time, was also explored. The effects of the protective immunity against challenge infection were assessed according to average body weight gain, survival rate, oocyst output, lesion score and the anti-coccidial index (ACI).

Results

The results suggested that intramuscular inoculation was the most efficient route to elicit immune response and 80 μg was the optimal immune dose. Two time injections induced more effective protection compared to single injection, the effect of the first injection at 14 days old was optimal. The immune efficacy of the vaccine stored at different time and temperature was very stable.

Conclusions

The optimal immunization procedure for Eimeria tenella DNA vaccine pVAX1-pEtK2-IL-2 is 80 μg DNA, two time injections at 14 and 21 days old, respectively, by intramuscular inoculation.

Keywords

E. tenella pEtK2 antigen DNA vaccine Immunization procedure Stability 

Notes

Acknowledgements

This work was supported by the Joint Research Project between National Natural Science Foundation of China and Pakistan Science Foundation (NSFC-PSF) (Grant no. 31661143017), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Colleges and Universities Nature Science Foundation of Jiangsu Province (17KJB230003) and the Qing Lan Project of Jiangsu Province (Grant no. 00000216049).

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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2019

Authors and Affiliations

  • Bucai Zhang
    • 1
    • 2
  • Cheng Yuan
    • 2
  • Xiaokai Song
    • 1
  • Lixin Xu
    • 1
  • Ruofeng Yan
    • 1
  • Muhammad Ali A. Shah
    • 3
  • Changming Guo
    • 2
  • Shanyuan Zhu
    • 2
  • Xiangrui Li
    • 1
    Email author
  1. 1.MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary MedicineNanjing Agricultural UniversityNanjingPeople’s Republic of China
  2. 2.Jiangsu Agri-animal Husbandry Vocational CollegeTaizhouPeople’s Republic of China
  3. 3.Department of PathobiologyPMAS Arid Agriculture UniversityRawalpindiPakistan

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