Keep things sterile guys, you don't want to end up like this guy 
See pics through the link below...
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"Aids bacteria Mycobacterium fortuitum causes abscess in bodybuilder
A British bodybuilder who injected anabolic steroids into his pecs developed abscesses that had to be surgically removed. Doctors at the Medway Maritime Hospital in Kent describe the case in a medical journal. The abscesses were caused by a bacterium that according to the textbooks is only dangerous when the immune system is weakened – for example as a result of a disease like Aids. But it seems that the pathogen is also a risk to steroids users....."
http://www.ergo-log.com/aids-bacteria-mycobacterium-fortuitum-causes-abscess-in-bodybuilder.html

See pics through the link below...
***
"Aids bacteria Mycobacterium fortuitum causes abscess in bodybuilder
A British bodybuilder who injected anabolic steroids into his pecs developed abscesses that had to be surgically removed. Doctors at the Medway Maritime Hospital in Kent describe the case in a medical journal. The abscesses were caused by a bacterium that according to the textbooks is only dangerous when the immune system is weakened – for example as a result of a disease like Aids. But it seems that the pathogen is also a risk to steroids users....."
http://www.ergo-log.com/aids-bacteria-mycobacterium-fortuitum-causes-abscess-in-bodybuilder.html