Question

Given below are two statements:
Statement (I): Sabin-Feldman dye test is a sensitive and specific method for diagnosis of toxoplasmosis.
Statement (II): If the tachyzoites do not stain with 1% methylene blue stain, then the test is negative.
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement (I) and Statement (II) are true.
• B. Both Statement (I) and Statement (II) are false.
• C. Statement (I) is true but Statement (II) is false.
• D. Statement (I) is false but Statement (II) is true.

Hint:

Remember the unique principle of the Sabin-Feldman dye test: Antibodies kill/neutralize the tachyzoites, preventing them from staining. Thus, Unstained = Positive for antibodies; Stained Blue = Negative for antibodies.

Answer 1

The Correct Option is C