Control measures against the spread of Legionella from wastewater treatment plants Wastewater treatment plants (WWTPs) may spread Legionella via the air and cause pneumonia if people inhale them.
Meningococcal disease serious, but still rare Meningococcal disease is a disease caused by a bacterium, the meningococcus. There are several types of this bacterium. In most cases, it does not make you ill.