International Journal of Dairy Science1811-97431811-9751Asian Network for Scientific Information10.3923/ijds.2007.50.57rucella abortus, Where Cattle Was Revaccinated with RB51]]>LopezE. Herrera AndradeL. Hernanez ResendizG. Palomares AparicioE. Diaz 1200721A prospective longitudinal study was performed of brucellosis monthly incidence during a period of six years, in a bovine dairy farm revaccinated with RB51 and endemic presentation of brucellosis, monthly serologies were done to the total amount of cows (average of 340). Prevalence at the beginning of the study was 15.3%. All negative animals were vaccinated with RB51 reduced doses and revaccinated. Card Test (CT) was executed and the positive sera were tested by rivanol. Sampling on day 150 showed incidence of 21%. During the first 360 days of the study, the cows that were positive to serology were not eliminated. During the period between 390 to 960 days, positive animals were eliminated, obtaining with this type of handling, incidences below 2%. Between days 990 to 1830 we returned to the criteria of not eliminating positives and therefore monthly incidences were 2%. From day 1830 on, all seropositive cows were eliminated with incidences during day 2160 and 2190, last day of our study, of 0.5 and 0.25%, respectively. The conclusion that we arrived at is that to have an efficient control of brucellosis, a vaccination program appropriate for epidemiological conditions of brucellosis in the region is required.]]>Acha, N. and B. Szyfres,19862nd Edn.,Alton, G.G., L.M. Jones, R.D. Angus and J.M. Verger,19881st Edn.,Pages: 174Pages: 174Durfee, P.T.,197854405406Aparicio, B.A., E. Diaz, L. Hernandez, R. Perez, E. Alfonseca and F. Suarez,2003Brucella abortus cepa 19 y expuestos al desafio natural en un hato infectado.]]>41129140Arellano-Reynoso, B., E. Diaz-Aparicio, M. Leal-Hernandez, L. Hernandez and J.P. Gorvel,2004B. abortus vaccinal strain isolated from cow milk.]]>98307312Bagnat, E. and J.C. Maneti,200281428429Bustamante, S.J., H.F. Salazar, E. Diaz, C. Manzano, R. Perez and L. Hernandez,2000Brucella abortus.]]>383542Cantu, C.A., E. Diaz, G. Adams, L. Hernandez and G.F. Suarez,20052005Castell, B.H.,19981998Cheville, N.F., M.G. Stevens, A.E. Jensen, F.M. Tatum and S.M. Halling,1993Brucella abortus.]]>5415911597Cheville, N.F.,200096147153Cloeckaert, A., M.S. Zygmunt and L.A. Guilloteau,2002Brucella abortus vaccine strain RB51 produces low levels of M-like O-antigen.]]>2018201822Diaz, A.E., B. Arellano, E. Herrera, M. Leal and F. Suarez,2004Brucella abortus RB51, en zonas endemicas de brucelosis.]]>2004pp: 19Elzer, P.H., F.M. Enright, L. Colby, S.D. Hagius and J.V. Walker et al.,1998Brucella abortus strain RB51.]]>5915751578Elzer, P.H., F.M. Enright, L. Colby, S.D. Hagius, J.B. Walker and M.B. Fatemi,1999Brucella abortus strain RB51 protects against infection and abortion induced by virulent challenge.]]>5915751578Farrel, I.D.,1974Brucella abortus from contaminated sources.]]>16280280Golding, B., D.E. Scott, O. Scharf, L.Y. Huang and Y. Zaitseva et al.,2001Brucella abortus.]]>34348Gonzalez, M.E., L. Hernandez and E. Diaz,2006B. abortus.]]>2006Herrera, L.E,2002Brucella abortus) en hatos bovinos con diferente prevalencia de brucelosis.]]>2002Leal, H.M.,2003Brucella abortus y eliminacion de la cepa vacunal en leche y exudado vaginal.]]>2003Leal, H.M., E. Diaz, R. Perez, H. Andrade, B. Arellano, E. Alfonseca and F. Suarez,2005Brucella abortus RB51 revaccinated cows, introduced in a herd with active brucellosis, with presence of atypical humoral response.]]>286370Lord, V.R., G.G. Schurig, J.W. Cherwonogrodsky, M.J. Marcano and G.E. Melendez,1998Brucella abortus strains RB51 and 19 under high and low disease prevalence.]]>5910161020Luna, M.E. and T.C. Mejia,19981998Moriyon, I., J. Grillo, D. Monreal, D. Gonzalez and C. Marin et al., 200435138Nicoletti, P.,1990Brucella.]]>13147168Norma Oficial Mexicana, NOM-041-ZOO,19951995Olsen, S.C., 2000Brucella abortus strain RB51.]]>69135140Stevens, M.G and S.C. Olsen,1996Brucella abortus 2308 in cattle vaccinated with B. abortus RB51.]]>6410301034Uza, F.A., L. Samartino, G. Schurig, A. Carrasco, K. Nielsen, F. Cabrera and R. Taddeo, 2000Brucella abortus strain RB51 on heifers and pregnant cattle.]]>24143151Valdespino, O.J,199956467Vemulapalli, R., Y. He, S.M. Buccolo, N. Srirauganathan and G.G. Schurig,2000Brucella abortus RB51 with a functional wboA gene results in O-antigen synthesis and enhanced vaccine efficacy but no change in rough phenotype and attenuation.]]>6839273932Vitela, M.I., C. Cruz-Vazquez and P.M. Ramos,200442437444