1.Catania, S., Bilato, D, Gobbo, F, Granato, A, Terregino, C, Iob, L. and Nicholas, R.A.J. 2010. Treatment of eggshell abnormalities and reduced egg production caused by Mycoplasma synoviae infection. Avian Dis., 54: 961- 964.

2.Dominquez-Vera, J.M., Gautron, J, Garcia-Ruiz, J.M. and Nys, Y. 2000. The effect of avian uterine fluid on the growth behaviour of calcite crystals. Poult. Sci., 79: 901-907.

3.Dufour-Gesbert, F., Dheilly, A, Marois, C. and Kempf, I. 2006. Epidemiological study on Mycoplasma synoviae infection in layers. Vet. Microbiol., 114: 148–154.

4.Feberwee A., Wit, J.J. and Landman, W. J.M. 2009a. Induction of eggshell apex abnormalities by Mycoplasma synoviae: Field and experimental studies. Avian Pathol., 38 : 77-85.

5.Feberwee, A., Morrow, C.J, Ghorashi, S.A, Noormohammadi, A.H. and Landman, W.J.M. 2009b. Effect of a live Mycoplasma synoviae vaccine on the production of eggshell apex abnormalities induced by a M. synoviae infection preceded by an infection with infectious bronchitis virus D1466. Avian Pathol., 38: 333–340.

6.Feberwee, A., Morrow, C.J, Ghorashi, S.A, Noormohammadi, A.H. and Landman, W.J.M. 2009b. Effect of a live Mycoplasma synoviae vaccine on the production of eggshell apex abnormalities induced by a M. synoviae infection preceded by an infection with infectious bronchitis virus D1466. Avian Pathol., 38: 333–340.

7.Gautron, J., Hincke, M.T. and Nys, J. 1997. Precursor matrix proteins in the uterine fluid change with stages of eggshell formation in hens. Connect. Tissue. Res., 36: 195-210.

8.Harikrishnan, S. and Mohan, R. 2018. Dietary factors improving egg shell quality in layer chicken: A review, Int. J. Pure App. Biosci., 6: 480-487.

9.Hinke, M.T., Gautron, J, Mann, K, Panheleux, M, McKee, M.D, Bain, M, Solomon, S.E. and Nys, Y. 2003. Purification of ovocalyxin- 32, a novel chicken eggshell matrix protein. Connect. Tissue Res., 44: 16-19.

10.Hinke, M.T., Gautron, J, Tsang, C.P, McKee, M.D. and Nys, Y. 1999. Molecular cloning and ultrastructural localization of the core protein of an eggshell matrix proteoglycan, ovocleidin-116. J. Biol. Chem., 274: 32915 - 32923.

11.Kleven, S.H. 2008. Control of Avian Mycoplasma Infections in Commercial Poultry. Avian Dis., 52: 367-374.

12.Marois, C., Dufour-Gesbert F. and Kempf, I. 2000. Detection of Mycoplasma synoviae in poultry environment samples by culture and polymerase chain reaction. Vet. Microbiol., 73: 311-318.

13.OIE. 2008. Avian Mycoplasmosis (M. gallisepticum and M. synoviae). In: Manual of diagnostic tests and vaccines for terrestrial animals. 6th Ed, Volume II., OIE, World Organisation for Animal Health, pp. 482-496.

14.Rajkumar, S., Reddy, M.R. and Somvanshi, R. 2018. Molecular prevalence and seroprevalence of Mycoplasma gallisepticum and M. synoviae in Indian Poultry Flocks. J. Anim. Res., 8: 15-19.

15.Roberts, J.R. 2004. Factors affecting egg internal quality and egg shell quality in laying hens. J. Poult. Sci., 41: 166–177.

16.Santos, F.C.D., Brandão, M.D.M, Silva, C.C.D, Machado, L.S, Soares, M.V, Barreto, M.L, Nascimento, E.R.D. and Pereira, V.L.A. 2014. Eggshell apex abnormalities in a free-range hen farm with Mycoplasma synoviae and Infectious bronchitis virus in Rio de Janeiro state, Braz. J. Poult. Sci., 16: 101–103.

17.Srinivasan, P., Balasubramaniam, G.A., Gopala Krishna Murthy, T.R. and Balachandran, P. 2012. Pathology of oviduct in suboptimally producing commercial layer chicken. Int. J. Poult. Sci., 11: 577-581.

18.Srinivasan, P., Balasubramaniam, G.A., Gopala Krishna Murthy, T.R. and Balachandran, P. 2014. Spontaneously occurring mycoplasmal salpingitis in commercial layer chicken with special reference to pathological features. Indian Vet. J., 91: 21-24.

19.Stipkovits, L. and Kempf, I. 1996. Mycoplasmosis in poultry. Rev. Sci. Tech., 15: 1495-1525.

20.Sumitha, S., Sukumar, K. and Balasubramaniam, A. 2017. Mycoplasma synoviae induced eggshell apex abnormalities in commercial layer chicken in Namakkal region of Tamil Nadu. Indian J. Anim. Sci., 87: 212 – 214.

21.Tomar, P., Singh, Y, Mahajan, N.K, Jindal, N. and Singh, M. 2017. Molecular detection of avian mycoplasmas in poultry affected with respiratory infections in Haryana (India). Int. J. Curr. Microbiol. App. Sci., 6: 2155-2162.