A 24-year-old pregnant woman was admitted to the hospital at 33 weeks’ gestation for dyspnea of 2-week duration. She had a mild dry cough and denied having chest pain, fever, hemoptysis, or night sweats. She had no arthralgias, rash, anorexia, abdominal pain, nausea, or vomiting.
The patient was adherent to regular antenatal care and had been treated for a Staphylococcus aureus urinary tract infection 2 weeks prior to admission. Her gestational history included multiple spontaneous abortions due to cervical incompetence, for which she had prophylactic cerclage during this pregnancy. She denied toxic habits or travel history; her tuberculin test had been negative 6 months earlier.