A 45-year-old white woman presented to our emergency department (ED) with a 3-day history of fever, chills, diffuse abdominal pain, severe headache, and shortness of breath.
The patient’s medical and surgical history was notable for acromegaly secondary to pituitary microadenoma, pituitary resection, and complete thyroidectomy 4 years earlier. Her medications included lanreotide, levothyroxine, gabapentin, alprazolam, and zolpidem. She had no history of cardiac disease, diabetes mellitus, immunodeficiency, or injection drug use. Three months prior to presenting to the ED, she underwent an outpatient gynecologic procedure for insertion of a levonorgestrel-releasing intrauterine device (IUD) for menorrhagia.
In the ED, the patient had a fever (101.5°F) and an elevated white blood cell count of 13,600/mm3 (reference range, 4,000–10,000/mm3). Cardiac auscultation revealed a regular heart rate and rhythm, with normal S1 and S2 sounds without murmur. Electrocardiogram documented normal sinus rhythm with no abnormalities. The physical examination revealed a diffusely tender lower abdomen without rebound or guarding. A pelvic examination was not conducted, and there was no collection of a vaginal swab sample to test for gonorrhea, chlamydia, or group B Streptococcus (GBS). Further workups for infection, including urinalysis, lumbar puncture, and chest x-ray, all yielded normal results.
Shortly after she was discharged from the ED, the patient was called to return to the hospital after blood cultures grew GBS; she was admitted for treatment.
A diagnosis of sepsis secondary to GBS bacteremia was made. However, the source of the GBS bacteremia and the patient’s abdominal symptoms remained unclear. Further workup included computed tomography (CT) of the abdomen, pelvis, and head, and magnetic resonance imaging of the brain; all imaging revealed no acute findings. Blood work (chem-7 panel, complete blood count, human immunodeficiency virus testing) was unremarkable except for an elevated level of C-reactive protein of 90 mg/L (reference range, 0–10 mg/L).
Radiography confirmed that the IUD was in the correct intrauterine position. However, transesophageal echocardiography (TEE) showed vegetations on the mitral and aortic valves, with preserved cardiac function. A diagnosis of GBS endocarditis was made, and infectious disease specialists were consulted. Because the patient had an anaphylactic allergy to penicillin, she was treated with intravenous vancomycin for 4 weeks. One month later, she had the IUD removed because of persistent abdominal pain.
Although the source of GBS bacteremia and endocarditis in our patient remained nondefinitive, the recent insertion of the IUD continued to be the suspected source and leading diagnosis.
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