Evaluation of the Control vs Eradication of Endemic Diseases of Swine

It is widely recognized that a large variation in productivity and profitability exists between farms in a country, and similarly, between countries in a global economy. Some profitability variables are due to cost of inputs and management and these are controllable by producers; other factors are not so easily predicted or controlled, for example: 65% of income variation is estimated to be due to  Feed conversion,  growth rate,  mortality rate of the pigs on a farm