Answer the following question given this paragraph: 

Different pathogens spread in different ways. Some pathogens spread through food. They cause food borne illnesses, which are discussed in a previous concept. Some pathogens spread through water. Giardia lamblia is one example. Water can be boiled to kill Giardia and most other pathogens.


Q: Water can be boiled to kill giardia and most other what?


A:
pathogens