Yes, poop particles, virus as well as bacteria can cause pink eye. Pink eye, also called conjunctivitis, is inflammation of conjunctiva inside the eyelid. Your eyes look red and feel ache and wet. There are three types of conjunctivitis: viral conjunctivitis, bacterial conjunctivitis and allergic conjunctivitis. All of them are infectious, so you had better to stay at home till get heal. The treatment period depends on your situation. The longest period will not exceed 2 weeks. The best way is to contact your doctor, and he will prescribe eye drops for the treatment. Poop particles are anywhere, like in bathroom. When you flash a toilet, poop particles fly into the air. For this reason, you know how important to wash hands after go to the restroom.