RESUMEN
Caused by imported beef cattle new outbreaks of Brucellosis (subtype III) were observed in the government district of Hannover, which was "Brucellosis free" over a long period. With the aim to interrupt the series of infections from herd to herd it seemed to be necessary to introduce a herd screening system including frequent tests. It was not possible to screen the herds by the usual way of blood serum testing because of reasons of practicability and economy. A practicable alternative was the ELISA supported tank investigation. Four of the last six outbreaks were detected by this milk sampling. The other two infected herds were detected by only clinical symptoms because the lactating cows were not infected and had no contacts to the infected separately held heifers. The required test frequency in the dairy cattle herds could only be realized applying an ELISA supported highly sensitive tank milk test method. This method offered the chance of discovering infected herds as soon as possible and prevented greater economical losses and animal health risks. The tank milk screening of the dairy cattle herds to detect antibodies against Brucellosis (and additional EBL and IBR) has now become a standard method to continue the official status "free from..." This is a safer and a more economic alternative to the previous blood sampling of cattle older than two years with a three years interval because this method guarantees a safe information about the serological status of each cow which is now tested at least once a year, depending on the time of dry standing status.(ABSTRACT TRUNCATED AT 250 WORDS)
Asunto(s)
Anticuerpos Antibacterianos/análisis , Brucella/inmunología , Brucelosis Bovina/prevención & control , Brotes de Enfermedades/veterinaria , Leche/inmunología , Animales , Bovinos , Brotes de Enfermedades/prevención & control , Femenino , Alemania/epidemiologíaRESUMEN
An FMD-outbreak in the Hannover provincial government district is reported. Cattle and pigs in 6 farms were affected. In all cases FMD-serotype O1 was isolated. The origin of the virus could not be clearly found. The new disease control measures in the FRG are regarded as adequate. It is recommended that all disease control measures should be immediately coordinated by the provincial district government from the very beginning. All infected farms were immediately cleared. For the first time the electric killing method was applied. In an area of about 13 kms around the outbreak all clawed animals were immediately vaccinated. Attention is directed to the economic losses as a result of commercial restrictions placed on agricultural products from the infected area.