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Because of the possibility of drug resistance or the persistence of exoerythrocytic parasites, identification of the causative species can be important in the choice of treatment for malaria. Which species of Plasmodium may have exoerythrocytic stages capable of causing relapse up to 3 or more years after initial infection? Select all that apply. 

The infective stage of the Entamoeba histolytica is the:

A 48-year-old patient was admitted to the hospital after complaining of fever and shortness of breath. Radiographs revealed an enlarged heart and complete blood count smear results revealed rare C-shaped trypomastigote forms. The patient was an active military duty officer years ago in the Panama Canal zone (Central/South America). The most likely parasite is:

 What is the main benefit of the ruminant’s complex stomach structure?

Which of the following is a means of transmission for toxoplasmosis? Select all that apply.

Which of the following causes elephantiasis (swelling of the extremities due to obstruction of the lymphatic system by adult filarial nematodes)?

Which one of these organisms is most likely to cross the placenta barrier and infect the developing fetus?

A 15-year-old patient was admitted with severe headache and confusion. An examination of their spinal fluid revealed many small, motile amoebae. The patient was visiting friends in Texas and had been swimming and diving in a freshwater pond. The most likely organism is:

Antimicrobial therapy for H. pylori infection consists of:

To determine the validity of 0% sodium chloride (NaCl) broth, which two organisms should be used for quality control purposes?