| DOID/SYMP | 
                                                                        
                                                                        
                                                                        Appendicitis (DOID:8337
                                                                                )A gastrointestinal system infectious disease that involves inflammation and infection of the appendix caused by the blockage of the lumen with a small, hard piece of stool, a foreign body or worms. Mucus backs up in the appendiceal lumen, causing bacteria that live inside the appendix to multiply. The infection has_symptom pain, in the upper abdomen initially and later in the lower abdomen, has_symptom nausea, has_symptom vomiting and has_symptom fever.
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