One direction imagine you have a sore throat. the doctor says it is a bacterial infection. why would you conclude that it is not caused by archaebacteria.

Archaebacteria are not pathogens.

Explanation:

There are thousands of disease-causing microorganisms but none of them are archaebacteria because  

They can't live inside the human body.  They only live in harsh or saline conditions such as hypersaline lakes, hot springs, volcanic vents, sulfur-rich places, or at the bottom of the sea.  They are too large to live inside a cell. They rarely exist on earth and mostly found in scalding water.