Agricultural biosecurity refers to management practices designed to prevent the introduction of pathogens into a herd or the spread of pathogens within a herd that could harm the herd’s health or compromise the quality of the products produced by the farm. Implementing and maintaining a biosecurity plan is important as the introduction of new diseases into a herd can be expensive in terms of decreased production due to the illnes an possibly death of animals including additional costs associated with treatment. In principle it is a complex of preventive measures designed to prevent the penetration of infectious agents in animals by persons (hygienic filtr), animals (wildlife, birds, pets), technological systems and equipment (technology of housing, feeding, drinking, removing of excrements, ventilation). Good management can do much to reduce the effect of adverse environmental factors. Biosecurity is an integral part of health herd management.