Explain the consequences to public health of transmission of pathogens.

Explain the consequences to public health of transmission of pathogens. Think about contributing factors such as; human demographics and behaviour, microbial adaption, breakdown of public health measures and international travel. Consider symptoms, global incidence and mortality, treatment and prevention, and use Cholera, Clostridium Difficile and Polio as examples.
Explain the difference between bactericidal and bacteriostatic antibiotics. Give examples of two types and evaluate the action of both types.