It contained Listeria bacteria, which were found. Listeria can infect soft-serve dispensing equipment, particularly if they are not fully cleaned and maintained on a regular basis. The women became sick between June 2014 and January 2015. At least one woman died from her injuries. The lawsuit claims that the restaurant was aware of the danger of eating ice cream during pregnancy but did nothing to warn consumers. It is also alleging that the manufacturer of the ice cream, Ben & Jerry's, was aware of the risk but failed to warn consumers either. Soft serve ice cream contains no hard ingredients like bones or shellfish that would prevent people from eating it while pregnant. However, because Listeria bacteria are found in both milk and meat, some experts believe that women should avoid all forms of dairy products during their pregnancies unless they know for sure that the facility where they bought their food is Listeria-free. Listeria bacteria are common in the environment and can be found in many foods without any signs of contamination. Symptoms include fever, stiffness, nausea, vomiting, diarrhea, abdominal pain, and headache. If you think you have been exposed to Listeria and you are pregnant, call your doctor immediately.