NEW YORK, N.Y. — What researchers found in the subway systems of the Big Apple is enough to make anyone sick. The Weill Cornell Medical College found traces of germs that could cause Bubonic Plague. Meningitis and stomach bacteria were also found hitching rides. For nearly two years, benches, handrails, subway seats and turn styles were swabbed at 466 stations. Hungry riders left behind DNA from mozzarella cheese and chickpeas.