[1] BUDZYNSKA M,WEARY D M.Weaning distress in dairy calves:effects of alternative weaning procedures[J].Applied Animal Behaviour Science,2008,112(1/2):33-39.
[2] JASPER J,WEARY D M.Effects of ad libitum milk intake on dairy calves[J].Journal of Dairy Science,2002,85(11):3054-3058.

[3] TERRÉ M,DEVANT M,BACH A.Effect of level of milk replacer fed to Holstein calves on performance during the preweaning period and starter digestibility at weaning[J].Livestock Science,2007,110(1/2):82-88.
[4] CALLAN R J,GARRY F B.Biosecurity and bovine respiratory disease[J].Veterinary Clinics of North America:Food Animal Practice,2002,18(1):57-77.

[5] DUFF G C,GALYEAN M L.Board-invited review:recent advances in management of highly stressed,newly received feedlot cattle[J].Journal of Animal Science,2007,85(3):823-840.

[6] SNOWDER G.GENETICS,environment and bovine respiratory disease[J].Animal Health Research Reviews,2009,10(2):117-119.

[7] HULBERT L E,COBB C J,CARROLL J A,et al.The effects of early weaning on innate immune responses of Holstein calves[J].Journal of Dairy Science,2011,94(5):2545-2556.

[8] HICKEY M C,DRENNAN M,EARLEY B.The effect of abrupt weaning of suckler calves on the plasma concentrations of cortisol,catecholamines,leukocytes,acute-phase proteins and
in vitro interferon-gamma production[J].Journal of Animal Science,2003,81(11):2847-2855.

[9] LYNCH E M,EARLEY B,MCGEE M,et al.Effect of abrupt weaning at housing on leukocyte distribution,functional activity of neutrophils,and acute phase protein response of beef calves[J].BMC Veterinary Research,2010,6:39.
[10] O'LOUGHLIN A,MCGEE M,WATERS S M,et al.Examination of the bovine leukocyte environment using immunogenetic biomarkers to assess immunocompetence following exposure to weaning stress[J].BMC Veterinary Research,2011,7:45.
[11] O'LOUGHLIN A,MCGEE M,DOYLE S,et al.Biomarker responses to weaning stress in beef calves[J].Research in Veterinary Science,2014,97(2):458-463.

[12] JOHNSTON D,KENNY D A,KELLY A K,et al.Characterisation of haematological profiles and whole blood relative gene expression levels in Holstein-Friesian and Jersey bull calves undergoing gradual weaning[J].Animal,2016,10(9):1547-1556.

[13] 张千,李发弟,李飞.断奶应激对幼龄反刍动物免疫系统的影响及其机理[J].动物营养学报,2016,28(7):1988-1997.
[14] LYNCH E M,EARLEY B,MCGEE M,et al.Characterisation of physiological and immunological responses in beef cows to abrupt weaning and subsequent housing[J].BMC Veterinary Research,2010,6:37.
[15] KIM M H,YANG J Y,UPADHAYA S D,et al.The stress of weaning influences serum levels of acute-phase proteins,iron-binding proteins,inflammatory cytokines,cortisol,and leukocyte subsets in Holstein calves[J].Journal of Veterinary Science,2011,12(2):151-157.

[16] LYNCH E M,MCGEE M,DOYLE S,et al.Effect of post-weaning management practices on physiological and immunological responses of weaned beef calves[J].Irish Journal of Agricultural and Food Research,2011,50(2):161-174.
[17] LYNCH E M,MCGEE M,DOYLE S,et al.Effect of pre-weaning concentrate supplementation on peripheral distribution of leukocytes,functional activity of neutrophils,acute phase protein and behavioural responses of abruptly weaned and housed beef calves[J].BMC Veterinary Research,2012,8:1.
[18] O'LOUGHLIN A,LYNN D J,MCGEE M,et al.Transcriptomic analysis of the stress response to weaning at housing in bovine leukocytes using RNA-seq technology[J].BMC Genomics,2012,13:250.
[19] CHALMERS T C.The importance of properly executed Meta-analyses in the interpretation of clinical-trials[J].Acta Pharmacol Tox,1986,59:19.
[20] 董书伟,张世栋,王东升,等.中药治疗牛子宫内膜炎的系统评价和Meta分析[J].畜牧兽医学报,2015,46(11):2085-2096.
[21] 张千,李发弟,李飞.反刍动物应激反应中糖皮质激素对免疫系统的调节机理[J].畜牧兽医学报,2017,48(5):785-792.
[22] GLASER R,KIECOLT-GLASER J K.Stress-induced immune dysfunction:implications for health[J].Nature Reviews Immunology,2005,5(3):243-251.

[23] RIVIER C,VALE W.Interaction of corticotropin-releasing factor and arginine vasopressin on adrenocorticotropin secretion
in vivo[J].Endocrinology,1983,113(3):939-942.

[24] WATABE T,TANAKA K,KUMAGAE M,et al.Role of endogenous arginine vasopressin in potentiating corticotropin-releasing hormone-stimulated corticotropin secretion in man[J].The Journal of Clinical Endocrinology & Metabolism,1988,66(6):1132-1137.

[25] EVANS R M.The steroid and thyroid hormone receptor superfamily[J].Science,1988,240(4854):889-895.

[26] ZAHOREC R.Ratio of neutrophil to lymphocyte counts-rapid and simple parameter of systemic inflammation and stress in critically ill[J].Bratislavske Lekarske Listy,2001,102(1):5-14.
[27] TEMPELMAN R J,SAAMA P M,FREEMAN A E,et al.Genetic variation in bovine neutrophil sensitivity to glucocorticoid challenge[J].Acta Agriculturae Scandinavica,Section A:Animal Science,2002,52(4):189-202.

[28] RODRIGUES-MASCARENHAS S,DOS SANTOS N F,RUMJANEK V M.Synergistic effect between ouabain and glucocorticoids for the induction of thymic atrophy[J].Bioscience Reports,2006,26(2):159-169.

[29] DHABHAR F S.A hassle a day may keep the pathogens away:the fight-or-flight stress response and the augmentation of immune function[J].Integrative and Comparative Biology,2009,49(3):215-236.

[30] GODSON D L,BACA-ESTRADA M E,VAN KESSEL A G,et al.Regulation of bovine acute phase responses by recombinant interleukin-1 beta[J].Canadian Journal of Veterinary Research,1995,59(4):249-255.
[31] CARROLL J A,FORSBERG N E.Influence of stress and nutrition on cattle immunity[J].Veterinary Clinics of North America:Food Animal Practice,2007,23(1):105-149.

[32] ARTHINGTON J D,EICHERT S D,KUNKLE W E,et al.Effect of transportation and commingling on the acute-phase protein response,growth,and feed intake of newly weaned beef calves[J].Journal of Animal Science,2003,81(5):1120-1125.

[33] HORADAGODA N U,KNOX K M G,GIBBS H A,et al.Acute phase proteins in cattle:discrimination between acute and chronic inflammation[J].Veterinary Record,1999,144(16):437-441.