An employee of Fiat Chrysler has contracted Legionnaires’ disease, and company officials are now conducting tests to ensure that their plant is not the source. The Jefferson North Assembly Plant in Detroit, MI was built in 1991 and employs about 5,000 people. The company learned of the employee’s diagnosis on Wednesday. Though the source of the bacteria is still unknown, officials are now testing the water sources at the plant. The company’s “abundance of caution for the safety and welfare” of its employees is likely prompted by the recent attention that Legionnaires’ disease has received in the nearby Flint, MI…