What pathogens are able to multiply at tempts below 5 degrees?

The group called psychrophiles (cold loving) grow at temperatures from -15 to 10C. Most belong to the Arthrobactera sp and Psychrobactera sp. These are not pathogens. These bacteria also are inportant in forming the nuclei of rain drops and snow flakes. Some think that they may have been able to "seed" the Earth with life millions of years ago.

Another genera are the Pseudomonas. Pseudomonas aeruginosa's genome has completely been sequenced. Although this one has been identified with many diseases, it is not a psychrophile.