Get your tetanus booster ASAP. Believe it or not just farms are where tetanus grows.  Generally found around horses, animal feces, yet it can develop anywhere. 
You think "Oh, couldn't happen to me, this is 2008", yet I do have that one in a thousand story regarding a elderly lady that contracted Lock Jaw and the only place she had any open areas or a place for the infection to enter her body was a slight scratch she received from a nail while going down to her basement for a canning jar of food.
Even though this is a time where we have over come such disasters as the guaranteed death sentence of Lock Jaw, keep on it, don't let it become a story to tell people. 
Its a shot once every decade, or if you have had a break in the skin directly involved with animals or as you have just read, anywhere.  
Below is a link that is one of the millions saying the same thing, go for a booster on Monday morning with your PCP.
http://www.mayoclinic.com/health/tetanus/DS00227
Please take care of yourself, its better to be safe then sorry!