C is best
A) "of the other infections such as" is very wordy. As a matter of fact, what does "the
other" referring to with the use of a definite article?
B) "such X like" is unidiomatic. Moreover, "considered a possibility" is clearly more wordy than "considered possible"
C) "such X as" is the best form
Just a word in the the first part of the sentence in A and C. The use of "something" or "what" are both fine and do not change the meaning of the sentence.