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Abstract
In the present study, Damitta and Dakahlia Govemorates were investigated
for brucellosis during the period between (2002-2003). Results showed that
7.6%,7.6% and 6.5% positive reactors for BAPAT, RBPT and Riv.T
respectively in Damitta Govemorates while in Dakahlia Govemorates
2.4%, 2.4% and 2.04% respectively. Results revealed no single test was
capable of conclusive diagnosis in all examined animals. Brucella
melitensis biovar 3 was the sole type detected in this study which is
considered the prevalent type of brucella among cattle in Egypt. In this
study evaluation of the policy of test and slaughter, results revealed rapid
elimination of positive cases eliminate the source of infection resulted in
gradual decrease of reactors. Also early release of the farm out of the
quarantine should be avoided and animals should be subjected for
successive serological examination for detection of animals that may still
incubating the diseases. Studying combined use of policy of test and
slayghter and vaccination using RB5 I finding refer to failure of such step
in control of brucella infection due to vaccination of animals which still
incubating the disease or exposure to infection before development of