Clinical Case Study #$3$ Michael was excited when his boss sent him to work on a $6$ month project with the Vice President of International Affairs at their corporation in Beijing, China. Before leaving the United States, he visited his family doctor for a complete physical and to receive his immunizations. The physician reviewed Michael's medical history and current lab results and declared that he was a healthy $32-$year old. Michael adjusted well to the move and made many new friends. They would often get together on the weekends for parties and cookouts. He quickly found that his favorite meal was a stir$-$fry containing a mixture of pork, fresh raw vegetables, and noodles. He would eat this combination of foods $3-4$ times a week. Though his friend Natalie, a microbiologist, wamed him about the dangers of undercooked meats, Michael still refused to use a meat thermometer for his pork. He argued that the meat was hot enough when the outside was no longer pink. To his surprise, within three months of moving to China, Michael started losing weight. He was not trying to lose weight and when asked about his diet, Michael would say that he ate all the time. At first, he thought it was just his metabolism adjusting to the oriental diet that his new friends were exposing him to and was not that concerned. However, after two months of non$-$stop eating and continuous weight loss, Michael was starting to think something might be wrong. Michael scheduled an appointment with Dr$.$ Clark at the local medical center. During his appointment, the two of them discussed where Michael had traveled since he had been in China, the types of food that he had eaten, and his exercise regimen. After talking with Michael, Dr$.$ Clark requested that multiple stogl specimens be sent to the laboratory for examination. Why does Dr$.$ Clark request multiple stool samples for examination?