What are the risks of bacteria in dogs to humans Dogs carry a very large number of bacteria, some of which are infected by human contact and can cause health problems. For example, streptococcal, staphylococcal infections can cause problems with the soft tissues of the human skin and can also lead to the appearance of infectious diseases of the upper respiratory tract. Infections such as Salmonella, Yersinia and E. coli may also cause infectious diseases of the digestive system. Many bacteria can cause bloodstream infections, and if there is broken skin or mucous membranes on the body, there is a risk of bacteraemia or sepsis, etc. if they come into contact with these bacteria.
