［1］BERG T P.Acute infectious bursal disease in poultry：a review ［J］.Avian Pathol，2000，29(3)：175-194.
［2］李潭清，宋勤叶，杨润得，等.鸡传染性法氏囊病的研究进展［J］.安徽农业科学，2008，36(35)：15481-15484.
LI T Q，SONG Q Y，YANG R D，et al.Advances in infectious bursal disease［J］.Journal of Anhui Agricultural Sciences，2008，36(35)：15481-15484.(in Chinese)
［3］CALNEK B W.禽病学 ［M］.10版.高福，苏敬良，译.北京:中国农业出版社，1999：914-937.
CALNEK B W.Poultry science ［M］.10th ed.GAO F，SU J L，translation.Beijing：China Agriculture Press，1999：914-937.(in Chinese)
［4］BOOT H J，TER HUURNE A H，PEETERS B P.Generation of full-length cDNA of the two genomic dsRNA segments of infectious bursal disease virus ［J］.J Virol Methods，2000，84(1)：49-58.
［5］AZAD A A，FAHEY K J，BARRETT S A，et al.Expression in Escherichia coli of cDNA fragments encoding the gene for the host-protective antigen of infectious brusal disease virus［J］.Virology，1986，149(2)：190-198.
［6］SACK R B.Enterotoxigenic Escherichia coli：identification and characterization［J］.Infect Dis，1980，142(2)：279-286.
［7］SIXMA T K，KALK K H，VAN ZANTEN B A，et al.Refined structure of Escherichia coli heat-labile enterotoxin，a close relative of cholera toxin［J］.J Mol Biol，1993，230(3)：890-918.
［8］GILL D M，RAPPAPORT R S.Origin of the enzymatically active A1 fragment of cholera toxin［J］.J Infect Dis，1979，139(6)：674-680.
［9］BRUNET J F，DENIZOT F，LUCIANI M F，et al.A new member of the immunoglobulin superfamily CTLA-4［J］.Nature，1987，328(6127)：267-270.
［10］SCHNITZLER D，BERNSTEIN F，MÜLLER H，et al.The genetic basis for the antigenicity of the VP2 protein of the infectious bursal disease virus［J］.J Gen Virol，1993，74(8)：1563-1571.
［11］BOOT H J，TER HUURNE A A，HOEKMAN A J，et al.Rescue of very virulent and mosaic infectious bursal disease virus from cloned cDNA：VP2 is not the sole determinant of the very virulent phenotype ［J］.J Virol，2000，74(15)：6701-6711.
［12］KATO T，NARIUCHI H.Polarization of naive CD4⁺ T cells toward the Th1 subset by CTLA-4 costimulation［J］.J Immunol，2000，164(7)：3554-3562.
［13］NAYAK B P，SAILAJA G，JABBAR A M.Enhancement of gp120-specific immune responses by genetic vaccination with the human immunodeficiency virus type 1 envelope gene fused to the gene coding for soluble CTLA4 ［J］. J Virol，2003，77(20)：10850-10861.
［14］王永娟，朱善元，左伟勇，等.鸡α-干扰素成熟肽的原核表达及其多价血清的制备［J］.扬州大学学报(农业与生命科学版)，2013，34(1)：32-35，40.
WANG Y J，ZHU S Y，ZUO W Y，et al.Prokaryotic expression of chicken α-interferon mature peptide and its preparation of polyvalent serum［J］.Journal of Yangzhou University:Agricultural and Life Science Edition，2013，34(1)：32-35，40.(in Chinese)
［15］白雪飞，郭静玉，雷万军，等.大肠杆菌不耐热肠毒素无毒突变体mLT63毒性检测及佐剂效果研究［J］.中国人兽共患病学报，2010，26(1)：69-71.
BAI X F，GUO J Y，LEI W J，et al.Toxicity detection of heat-labile enterotoxin in non-toxic mutant of Escherichia coli and investigation on its adjuvant effect of E.coli heat-labile enterotoxin［J］.Chinese Journal of Zoonoses，2010，26(1)：69-71.(in Chinese)
［16］张钰，孙怀昌，黄燕燕，等.鸡CTLA-4胞外区的原核表达与免疫佐剂作用［J］.中国兽医科学，2012，42(6)：611-616.
ZHANG Y，SUN H C，HUANG Y Y，et al.Prokaryotic expression and immunoadjuvant effect of the extracellular domain of chicken CTLA-4［J］. Chinese Veterinary Science，2012，42(6)：611-616.(in Chinese)
［17］赵艳敏，刘惠莉.大肠埃希菌不耐热肠毒素作为黏膜免疫佐剂的研究进展［J］.动物医学进展，2007，28(3)：46-50.
ZHAO Y M，LIU H L.Advances in E.coli heat-labile enterotoxin as a mucous immunoadjuvant［J］.Progress in Veterinary Medicine，2007，28(3)：46-50.(in Chinese)
［18］唐思静，吕转平，马博，等.大肠杆菌不耐热肠毒素突变体作为佐剂的研究进展［J］.上海畜牧兽医通讯，2013(5)：16-18.
TANG J S，LÜ Z P，MA B，et al.Advances in E.coli heat-labile enterotoxin as adjuvant［J］.Shanghai Journal of Animal Husbandry and Veterinary Medicine，2013(5)：16-18.(in Chinese)