A new technique uses microneedles incorporated into permanent or semi-permanent medical devices -- such as glucose monitors. The researchers found that modifying the surface of a microneedle with an antimicrobial coating both prevented microbial growth and did not adversely affect skin cell growth. 8)
http://www.sciencedaily.com/releases/2010/05/100519112620.htm
http://www.sciencedaily.com/releases/2010/05/100519112620.htm