More than 100 people across New Zealand are sick from Yersinia pseudotuberculosis, and at least 35 people have been hospitalized. Most cases have been in the Auckland, Christchurch and Wellington areas. Outbreaks of Yersinia pseudotuberculosis, which are not common, have previously been associated with the consumption of contaminated food, especially raw or undercooked pork products, and sometimes fresh produce. Toi Te Ora — the public health unit for the Bay of Plenty and Lakes District Health Boards — suspects that pre-packaged carrots and lettuce are to blame, but health officials have not yet confirmed the source of the outbreak. According to the U.S. Centers for Disease Control and Prevention, infection with Y. enterocolitica occurs most often in young children. Common symptoms in children are fever, abdominal pain and diarrhea, which is often bloody. Symptoms typically develop four to seven days after exposure and may last one to three weeks or longer. In older children and adults, right-side abdominal pain and fever may be the main symptoms and may be confused with appendicitis. In a small proportion of cases, complications such as skin rash, joint pains, or spread of bacteria to the bloodstream can occur. Health officials are reminding people to take extra care with personal hygiene when preparing and consuming food and to thoroughly wash any raw fruits and vegetables before eating them.