[Causes of lamb losses with special reference to listeriosis on a large-scale farm]

Epizootiological studies on lamb losses on a large scale farm (4.5 thousand mothers) were carried out. The results of the studies denied the direct effect of maize silage on the genesis of enzootia of listeriosis. The earlier reports were confirmed, i.e. that the direct cause of enzootia of listeriosis is the weakening of an animal organism due to other microbiological, zoohigienical, nutritional factors (e.g. not proper content of mineral compounds). Maize silage has a destructive effect on the health of lambs as well as other fodders with unsuitable biochemical composition. The results of the studies were prepared in Basic language using Hellwig's method "Determination of the maximum capacity of data carrier", to enable the automation of statistical data. Verification of the above mentioned method was done on the basis of the results of the studies performed on a sheep farm. Essential influence of the content of magnesium and iron as well as statistically known interdependencies between the indices studied were revealed and confirmed. "Listing" of the programme; data and result printout, to be used widely, was enclosed.