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Farm Animals and Pets Also Need Vaccines


René F. Najera, DrPH

June 30, 2019

Unless you adhere to a strict, no-pork diet, you've probably had some sort of pork product in your life. From bacon with breakfast to a pork chop for dinner and gelatin for dessert, there are too many pork products to list. According to the , the United States produces about $23 billion in pork products each year. Like with other livestock, it is crucial for pork growers to keep their herd healthy. One way they do this is through vaccination. A new just went to market. It offers protection against Erysipelas (a bacterial infection caused by Erysipelothrix rhusiopathiae), Leptospirosis () and  (a viral infection). All three of these infections can cause stillbirth in pigs, so farmers are encouraged to use the vaccine to increase the size and health of their herds. Vaccines for animal diseases are nothing new. In 1879, Louis Pasteur developed a vaccine against chicken cholera (a bacterial infection caused by Pasteurella multocida). , by the way:
"Pasteur attenuated, or weakened, the bacteria for use in the vaccine. He happened upon the method of attenuation by accident: in his lab, he was studying fowl cholera by injecting chickens with the live bacteria and recording the fatal progression of the illness. He had instructed an assistant to inject the chickens with a fresh culture of the bacteria before a holiday. The assistant, however, forgot. When the assistant returned a month later, he carried out Pasteur’s wishes. The chickens, while showing mild signs of the disease, survived. When they were healthy again, Pasteur injected them with fresh bacteria. The chickens did not become ill. Pasteur eventually reasoned the factor that made the bacteria less deadly was exposure to oxygen."
Today, veterinary associations recommend vaccination for animals,  that are in constant contact with humans. This is because some diseases, when passed on to humans, can be quite deadly. For example, rabies is 100% fatal if the person who receives a bite from a rabid animal is not given the rabies vaccine as soon as possible. While rare in the United States, rabies kills tens of thousands of people around the world. In India alone, the number of people bitten by dogs each year is estimated to be in the millions, and the number of people dying of rabies is . The concept of One Health () is something that is being included in more and more public health and veterinary health policies, including vaccination. Unfortunately, just like with human vaccines, . In the United Kingdom, about 25%  of dogs and 35% of cats are reported by their owners as not vaccinated or under-vaccinated. Although , other vaccine-preventable diseases in animals are still circulating there. Time will tell if diseases that can threaten the lives of pets and other animals are allowed to return like measles in humans has. Allowing vaccine-preventable diseases to decimate food animals like pork, chickens and beef would not only be a severe hit to the economy. It would threaten food security for people all around the world as these animals are a source of protein in the diets of many and a source of income for those who raise them and take them to market.


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