A 66-year-old woman hospitalized for pneumonia received clindamycin therapy. Five days into treatment, she develops watery diarrhea, lower abdominal cramping, and fever (38.5°C). Vital signs show HR 98/min, BP 128/82 mmHg, RR 18/min. Laboratory studies reveal WBC 14,500/μL with left shift. Colonoscopy demonstrates yellow-white plaques overlying inflamed colonic mucosa. She denies recent antibiotic use prior to hospitalization. Which organism is most likely responsible for these findings?
- A)Bacillus cereus
- B)Vibrio cholerae
- C)Clostridioides difficileGABARITO
- D)Escherichia coli
- E)Clostridium perfringens
Explicação
Clostridioides difficile is correct. Antibiotic exposure, especially clindamycin, can disrupt normal colonic flora and allow overgrowth of C difficile, whose toxins cause pseudomembranous colitis. The yellow white plaques on colonoscopy are classic pseudomembr... Ver explicação completa e trilha adaptativa →