The general requirements for farming practice are to determine the optimal conditions that allow maximum efficiency and health of the herd. The aim of our work was to express the effect of Biosecurity precautions in a pig farm with the average monthly number of fattening pigs around 4,000 pieces after implementation the TEKROCID system and after repopulation of the pig farm from points of view the animal health and economical rentability. The results showed the positive effect of implementation of the TEKROCID system in the farm for fattening pigs. The average monthly number of dead pigs decreased after the introduction of the system to 69.4 %. Final reduction to 44.4 %, compared with values before implementation of the TEKROCID system, was reached after repopulation of the herd. After restocking of livestock, in accordance with the new animal hygiene practices, no therapeutic medication was necessary.