WBR0876
| Author | [[PageAuthor::Rim Halaby, M.D. [1]]] |
|---|---|
| Exam Type | ExamType::USMLE Step 1 |
| Main Category | MainCategory::Microbiology |
| Sub Category | SubCategory::Infectious Disease |
| Prompt | [[Prompt::A 75 year old man with history of severe emphysema maintained on home oxygen is admitted to the intensive care unit for desaturation on 100% FiO2. On admission, his heart rate is 133 bpm, blood pressure 80/53 mmHg, and temperature 39.1 C. Despite efforts, the patient dies shortly after admission. Postmortem examination reveals several black necrotic lesions with a surrounding erythematous edge most prominent on the lower extremities. Blood cultures withdrawn on admission, reveal growth of road shaped gram-negative organisms. What is the most likely organism involved in the patient's presentation?
gram negative]] |
| Answer A | AnswerA::''Escherichia coli'' |
| Answer A Explanation | AnswerAExp:: |
| Answer B | AnswerB::''Klebsiella pneumoniae'' |
| Answer B Explanation | AnswerBExp:: |
| Answer C | AnswerC::''Citrobacter freundii'' |
| Answer C Explanation | AnswerCExp:: |
| Answer D | AnswerD::''Pseudomonas aeruginosa'' |
| Answer D Explanation | AnswerDExp:: |
| Answer E | AnswerE::''Proteus mirabilis'' |
| Answer E Explanation | AnswerEExp:: |
| Right Answer | RightAnswer::D |
| Explanation | [[Explanation:: Educational Objective: |
| Approved | Approved::No |
| Keyword | WBRKeyword::Pseudomonas aeruginosa, WBRKeyword::ecthyema gangrenosum |
| Linked Question | Linked:: |
| Order in Linked Questions | LinkedOrder:: |