A middle aged Asian presents with episodes of fever with rigors and chills for last 1y

A middle aged Asian presents with episodes of fever with rigors and chills for last 1y. Blood film:
ring form plasmodium with schaffners dots in RBCs. What is the drug to eradicate this infection?

a. Doxycycline
b. Mefloquine
c. Proguanil
d. Quinine
e. Artesonate

Q. 1. What is the key?
Q. 2. What does Shuffner’s dot in RBC indicate?
Ans. 1. The key is B. Mefloquine. Probably wrong key as mefloquine can not eradicate hepatic cycle! Primaquine is the drug that can eradicate hepatic cycle.
Ans. 2. Shuffners dot indicates, it is plasmodium ovale or plasmodium vivex infestation.
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