Case 11
An adult man, an immigrant from El Salvador, went to the Emergency Room of a U.S. hospital with fever and confusion that did not respond to antibiotic treatment.  A CT scan showed a brain lesion.  The patient was HIV-positive and his last visit to El Salvador was one year earlier.  A spinal tap showed low glucose and high protein levels in the CSF.  In addition, the organisms shown in Figures A through D were found in the CSF (size approximately 20 micrometers; Giemsa stain).  What is your diagnosis?  Based on what criteria?  What other diagnostic tests would you suggest?

A	B

C	D

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Case 12
An adult male patient went to a hospital in Virginia with symptoms suggestive of a complicated course of pneumonia, for which he was treated with antibiotics.  He had traveled to Kenya four months earlier and to Beijing, China six days earlier.  The blood smear showed the organisms seen in Figures A through D.  Note: The infected erythrocyte in Figure B is not enlarged, compared to noninfected erythrocytes.  What is your diagnosis?  Based on what criteria?

A	B

C	D

Click here for the answer to Case 12.