The project received a grant from the Sten K. Johnsson Foundation in 2015. Since then, the following has happened: 1) a needle prototype has been developed with JOIN in Lund. 2) A study of the needle at the Centre of Bacteriology at Lund University has shown that: a) the needle works b) it provides temperature-sensitive killing of bacteria c) it has a very good effect on E. coli, which is the bacterium that usually causes clinical infection. The needle works well in a laboratory environment. The goal is to reduce the number of infections associated with prostate biopsies. As a side effect of safer biopsies one can be more liberal with conducting biopsies and logically detect more prostate cancer than before. The technique should also reduce bleeding after the biopsy.