Below is an instruction from Human. Write a response.
    ### Instruction:
    what are public health agencies doing to prevent or control yersiniosis for Yersinia ?
    ### Response:
    The Centers for Disease Control and Prevention (CDC) monitors the frequency of Y. enterocolitica infections through the foodborne disease active surveillance network (FoodNet). In addition, CDC conducts investigations of outbreaks of yersiniosis to control them and to learn more about how to prevent these infections.
    