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Hydranencephaly without arthrogryposis was observed in three newborn Holstein-Friesian calves, born during one week in a 400-cow dairy herd in Zambia. The affected calves were blind and exhibited nystagmus and depressed behavior. Akabane virus infection was suspected based on the pathological findings and etiological data, however, we could not determine the exact causative agent.

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SUMMARYAn outbreak of avian colibacillosis was diagnosed on a broiler farm in Lusaka, Zambia. There were 12 open flat pens on the farm, and chicks in house No.6, which had more than four thousands birds, showed respiratory signs, general weakness and diarrhea from 33 days of age, and 565 chicks died by 50 days of age. Severe airsacculitis, pericarditis and perihepatitis were odserved. Escherichia coli was isolated from the affected chicks. Serologically, the chicks were negative for Mycoplasma gallisepticum and M synoviae. Etiological survey revealed that 4,446 chicks were introduced into the pen, even though the capacity was 3,500 birds. Therefore, density of the pen reached 18.3 birds/m2. In conclusion, the present outbreak seemed to be caused by overcrowding of birds.

Dans un troupeau de moutons importés d'Afrique du Sud, une brebis est devenue partiellement anorexique et a perdu régulièrement du poids et sa bonne condition physique. Après examens clinique, coprologique et histologique, la paratuberculose (maladie de Johne) a été confirmée. Cependant, le résultat des cultures est resté douteux. Une recherche sérologique sur d'autres moutons du même troupeau et sur ceux d'une autre ferme a mis en évidence des anticorps anti-Mycobacterium paratuberculosis par un test de fixation du complément. L'étude suggère que la maladie est dans sa phase d'extension. C'est la première fois, en République de Zambie, qu'un cas de paratuberculose ovine est rapporté.