Complex Microbial Infection of Urachal Remnant: A Case Report

<b>Background and Clinical Significance:</b> We present a rare case of an infected urachal remnant involving four microorganisms, including anaerobic bacteria. <b>Case Presentation:</b> A 23-year-old man presented with abdominal pain around the umbilicus, diarrhea and discharge. Laboratory findings and imaging led to a diagnosis of an infected urachal remnant. He was treated with broad-spectrum antibiotic therapy, and the abscess in the urachal remnant was drained. In cultures from the purulent urachal remnant, <i>Bacteroides ovatus</i>, <i>Anaerococcus vaginalis</i>, <i>Bacteroides uniformis</i>, and <i>Peptostreptococcus stomatis</i> were detected. After 2 months, the urachal remnant infection had not relapsed. <b>Conclusions:</b> This report presents the first documented case of an infected urachal remnant in which four anaerobic microorganisms were identified. In patients with fever, abdominal pain, and discharge from the umbilicus, physicians should consider the possibility of an infected urachal remnant in their differential diagnosis. Treatment should include appropriate antibiotic therapy to cover anaerobic organisms, and in cases where the clinical course does not improve, drainage of the urachal remnant may be necessary.