Legionnaires' disease people in and beyond the park. Legionnaires' disease Legionnaires' disease, also known as legionellosis, is a form of atypical pneumonia caused by any type of "Legionella" bacteria. Signs and symptoms include cough, shortness of breath, high fever, muscle pains, and headaches. Nausea, vomiting, and diarrhea may also occur. This often begins 2-10 days after exposure. The bacterium is found naturally in fresh water. It can contaminate hot water tanks, hot tubs, and cooling towers of large air conditioners. It is usually spread by breathing in mist that contains the bacteria. It can also occur when contaminated water is aspirated. It
Disease in Imperial Rome was not ideal for combating diseases. Their sewer system, praised for its longevity, had many flaws. As "Water History"’s Roger Hanson explains, street drainage and sewage flowed through the same pipes, which led to sewage openings on the streets. Also, since most sewer systems were privately owned, they were also privately maintained and in turn neglected. Instead, citizens would turn to their latrines; if they lived on anything but the ground floor they would even throw their excrement onto the street. This led to exposure of sewage to flies, dogs, and bacteria, all of which helped spread disease among Romans.