What should be the density of microfilaria in blood to make it infective to the vector: (A) 5 microfilaria / drop of blood, (B) 10 microfilaria / drop of blood, (C) 15 microfilaria / drop of blood, (D) 20 microfilaria / drop of blood
Answer is C. A density of 15 microfilaria / drop of blood are needed to make it infective.