A patient who recently traveled to Central America presents…

A patient who recently traveled to Central America presents to the emergency room with fever and chills occurring every third day.  A thick and thin prep of the patient’s blood is prepared and stained as malaria is suspected.  Inclusions seen in the patient’s RBC’s are described as blue disks with red nuclei.  The infected erythrocytes are generally enlarged and some of them having reddish granules.  Some of the RBC’s appear to have >15 merozoites in a single cell.  Identify the parasite described:

A young man from rural Brazil is visiting family in the Unit…

A young man from rural Brazil is visiting family in the United States when he becomes ill with muscle pains, high fever, and hepatosplenomegaly.  A blood sample taken in the emergency room reveals the following organism. The most likely identification of this organism is:

A patient traveling in North and Central Africa is bitten by…

A patient traveling in North and Central Africa is bitten by a sand fly.  The patient develops an infection at the site of the bite wound followed by extensive enlargement of the abdominal organs and intestines. A biopsy of the liver and kidneys shows organisms resembling a yeast-like cell within the macrophages. The most likely cause of this condition is: