http://phys.org/news/2013-06-classic-microscopy-reveals-borrelia-bacteria.html
great article
CONCEALED HEALTH THREAT: "We know that Borrelia can infect any part of the body. If the blood tests used by the public health service do not detect the bacteria effectively, it makes one wonder how many people have had their lives destroyed by a single blood transfusion. Borrelia is closely related to the deadly bacterium which causes syphilis, and we cannot exclude the possibility that Borrelia is also transmitted by sexual intercourse", acknowledge Morten Laane and Ivar Mysterud. Credit: Ola Sæther
Read more at: http://phys.org/news/2013-06-classic-microscopy-reveals-borrelia-bacteria.html#jCp