09-04-2008, 08:04 AM
A previously healthy 24-year-old woman comes to the emergency department because of diarrhea, nausea, flatulence, and bloating for the past 5 weeks. Bowel movements are accompanied by abdominal cramping. She has not traveled out of the United States. Tympanic temperature is 37 degrees C (98.6 degrees F). Bowel sounds are increased. Test of stool for occult blood is negative. Which of the following is the most likely causal organism?
A) Bacillus cereus
B) Campylobacter jejuni
C) Cryptosporidium parvum
D) Gardia lamblia
E) Shigella sonnei
A) Bacillus cereus
B) Campylobacter jejuni
C) Cryptosporidium parvum
D) Gardia lamblia
E) Shigella sonnei