Microbiology Question:
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Each of the following statements (except one) is true regarding malaria. Which one is false?

Answer:

* A. Once someone has malaria infection, they will have it for the rest of their life in spite of treatment
* B. All persons who contract P. vivax malaria have Duffy Antigen present on their red blood cells
* C. Persons with sickle cell trait or disease are more resistant to serious malaria
* D. Schuffner's dots in red cell cytoplasm are most consistent with P. vivax or ovale malaria
* E. One way to help diagnose P. malariae is to carefully record the pattern of symptoms since it is the only species to have a 72 hour interval of symptoms

Correct Answer: A

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This July a group of 30 volunteers went to Kenya to help build a school and all of them took prophylaxis to prevent malaria. They claim that they took the medication as prescribed 2 weeks before, during their stay, and for 4 weeks after returning home. In October, one person developed malaria and by April of this year, 9 of the 30 volunteers had been treated for malaria. Which of the following is the least likely explanation for this apparent failure of prevention?A 42-year old patient from Ecuador is admitted with fever, right upper abdominal pain and is found to have a cystic mass of the liver. You suspect an amebic abscess and order stool exams that are reported as positive for E. histolytica and an ameba serology is positive at 1:256. Which statement is false regarding ameba?