<prompt> Most common type of pathogenic bacteria grow in temperatures25 to 40 degrees centigrade-20 degrees0 to 20 degreesAbove 50 degrees  <response>: Mesophiles grow in between 25 to 40 They are the most common type of bacteria Organisms that prefer extreme environments are known as extremophiles. Ref: CP Baveja 4th ed Pg: 6 