Did you know that just a single ounce of dog poo contains about 23 million microorganisms of bacteria, which is enough to cause sickness in humans? Germs carried by your pet poo can cause diarrhea, stomach cramps, nausea, dehydration, fever, or a cough. In some cases, parasites in pet poo can even cause vision loss or birth defects if a pregnant woman becomes infected.Also a typical tapeworm ( A Hydatid Worm) produces eggs that are passed with the dog's feces. When poo is eaten that person may become infected. Eggs hatch into Larvae and go into the persons blood forming Cysts in the persons tissue. Symptoms can include liver enlargement, hooklets in sputum and possible anaphylactic shock when the immune system reacts to ruptured cysts. A cyst can be diagnosed with ultrasound or MRIThis is treated with surgery, taking special care to leave the cyst intact so new cysts do not form, and medicine over a long period of time at low dosages.