Asian Journal of Animal and Veterinary Advances1683-99191996-3289Academic Journals Inc.10.3923/ajava.2022.28.32KadjaM.C. MillogoG.A. Sourokou SabiS. KaneY. KaboretY. 12022171Background and Objective: A seroepidemiological survey was carried out in Senegal in an area with a high concentration of poultry for Newcastle disease, infectious bronchitis (IB), LPAI subtype H9 and Mycoplasma gallisepticum mycoplasmosis in broilers. Materials and Methods: During the survey, 20 broiler farms with at least 1,000 clinically affected birds per flock aged 16-45 days with respiratory symptoms were visited. On each farm, a questionnaire was administered and blood samples were taken from 20 chickens in the most affected house. A serological investigation by indirect ELISA was carried out on 384 sera. Serological infection rates varied according to disease, age, vaccination program and husbandry system. Results: The infection rates were in order of importance 40% for LPAI subtype H9, 35% for infectious bronchitis and 5% for Newcastle disease. Serology was negative for Mycoplasma gallisepticum. Infection rates were higher in the department of Rufisque, in semi-intensive farms and older chickens. Co-infections were observed with higher importance for the IB-LPAI association. The evaluation of vaccine efficacy revealed that 70% of cases of Newcastle disease, 42.86% of cases of infectious bronchitis and 26.31% of cases of LPAI subtype H9 were suspected of being ineffective. Conclusion: This work shows the need to have a database for the implementation of a medical prophylaxis programme specific to the epidemiological conditions of these farms. Nucleic acid sequencing to identify circulating serotypes is the next step.]]>Yadav, J.P., P. Tomar, Y. Singh and S.K. Khurana,2021Mycoplasma gallisepticum and Mycoplasma synoviae infection in poultry: A systematic review.]]>10110Vandegrift, K.J., S.H. Sokolow, P. Daszak and A.M. Kilpatrick,20101195113128Chaidez-Ibarra, M.A., D.Z. Velazquez, I. Enriquez-Verdugo, N.C. del Campo and M.A. Rodriguez-Gaxiola, et al.,2021Mycoplasma gallisepticum and Mycoplasma synoviae in poultry: A systematic review and meta-analysis.]]>2021 Jordan, A.B., V. Gongora, D. Hartley and C. Oura,20182018Gautier-Bouchardon, A.V. and I. Kempf,2008161185190Rahman, M.Z., S.M. Harun-ur-Rashid, M.G. Azam, M. Nuruzzaman and M.G. Rahman,202087883Alsahami, A., A. Ideris, A. Omar, S.Z. Ramanoon and M.B. Sadiq,20186186191Bhuiyan, Z.A., M.Z. Ali, M.M. Moula, M.A. Bary, N. Arefin and M. Giasuddin,20196561566Sharma, R.N., K.P. Tiwari, A. Chikweto, D. Thomas, C. DeAllie, G. Stratton and M.I. Bhaiyat,201413299303Kim, Y., P.K. Biswas, M. Giasuddin, M. Hasan and R. Mahmud et al.,20182423092316Rauw, F., Y. Gardin, T. van den Berg and B. Lambrecht,2009Gallus gallus).]]>13587596