Fact 1: Disease-causing microbes have a negative impact on the body.

Fact 2: Microbes are also called bacteria or microorganisms.

Given the two facts above, answer the question "What bacteria have a negative impact on the body?" with the following options: 
- helpful
 - parasites
 - disease-causing
 - Roundworms.
 - beneficial
 - smallpox
 - disease-curing
 - a pathogens


 

   disease-causing      