Leukemia is called leukosis if a chicken has it. Yet it is the same cancer. The USDA allows cancers the size of grapefruits to be cut out of cows and allows the rest of the carcass to be passed. Those who eat frozen meat are trusting to proper freezing at the slaughterhouse, in transportation trucks, warehouses, grocery freezers, and at home. Thermophilic bacteria can survive temperatures of 300 degrees or more.
Creiophilic bacteria can survive freezing temperatures in meat.
As early as 1905 the USDA was saying that over 100 diseases could be contacted by humans eating the flesh or products of animals. Now the number is in the thousands. Brucellosis, trichinosis, toxoplasmosis, ptomaine poisoning, E coli bacteria are some of these. Histoplasmosis, present in bird waste, is a special health hazard near factory farms' water supply. San and Ella.