While some studies have established connections between antibiotic resistant infections and food-producing animals,[64][65] others have struggled to establish causal links, even when examining plasmid-mediated resistance.[66][67][12][69] Standard precautions such as pasteurising, or preparing and cooking meat properly, food preservation methods, and effective hand washing can help eliminate, decrease, or prevent spread of and infection from these and other potentially harmful bacteria.[70][71]