Parasitology Research

, Volume 114, Issue 9, pp 3229–3236 | Cite as

Protective immunity against Eimeria tenella infection in chickens following oral immunization with Bacillus subtilis expressing Eimeria tenella 3-1E protein

  • Zhiwei Lin
  • Yanyun Shi
  • Bin Deng
  • Xiangfei Mao
  • Dongyou Yu
  • Weifen Li
Original Paper


The current experiment was conducted to construct recombinant Bacillus subtilis WB600 expressing Eimeria tenella 3-1E protein to investigate the oral immunization protective effects against E. tenella. The merozoite surface antigen 3-1E gene of E. tenella was introduced into the pBS-H1 expression vector with a novel signal peptide sequence. After the electro-transformation, the expression of objective protein in B. subtilis WB600 was detected by Western blot. The results showed that the recombinant B. subtilis strain with the ability of high-level secretion of 3-1E was constructed successfully. Seven-day-old broiler chickens were orally vaccinated with B. subtilis WB600 harboring 3-1E (B.S-pBS-H1-3-1E) or B. subtilis WB600 with empty plasmid (B.S-pBS-H1) 10 days prior to challenge with sporulated E. tenella oocysts. The results showed the recombinant B. subtilis strain with the ability of high-level secretion of 3-1E was constructed successfully. Vaccination with B.S-pBS-H1-3-1E strain significantly increased the anti-coccidial index and reduced cecal lesion scores compared with the positive control group (chickens were challenged with sporulated E. tenella oocysts without oral administration of B.S-pBS-H1-3-1E strain) and B.S-pBS-H1 group. Ceca mucosal sIgA, secretion, and IL-2, IL-12, IFN-γ, and IL-10 level after challenge were greater in the B.S-pBS-H1-3-1E group than in the positive control group. Taken together, these results indicated that B. subtilis WB600 harboring 3-1E protein induces protective immunity against E. tenella.


Bacillus subtilis Chickens Eimeria tenella Oral immunization 3-1E protein 



The present research was funded by Science and Technology Program of Zhejiang Province (No.2011C16039) and Science and Technology Program of Hangzhou (No.20120232B26). The authors also thank Zhusuo Wang (Director of Chia Tai Broiler Development Center, Zhejiang University, China) for his kind assistance with the feeding trial.

Conflict of interest

The authors declare that they have no competing interest.

Supplementary material

436_2015_4539_MOESM1_ESM.pdf (476 kb)
ESM 1 Analysis of recombinant coccidial antigen 3-1E by MALDI-TOF (PDF 475 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal SciencesZhejiang UniversityHangzhouPeople’s Republic of China

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