I have the concept for a trap I just don't know how to put it in a stat block format.
Sometimes there are spikes at the bottom of the bog. When walking through the bog that has spikes on the bottom (similar to caltrops) they make a attack roll (+0 Attak Bonus) and deal one point of damage. The spikes hurt the foot and cut a creaturs speed by half. The penalty waers of after 24 hours or a succesful DC 15 heal check. Stepping on a spike counts as a touch attack with a +2 armor class if the creature is wearing shoes or boots. If the attack succeds, there is a 20% chance the subject will contract a disease with a +5% chance for every round spent in the bog.