It was definitely not clear to me that you just wanted to add words. I took you as meaning that you wanted the headline to be "Feral pig must transmits brucellosis", which would be significantly less clear.
I also do not think "Brucellosis brucellosis. Brucellosis? Brucellosis BRUCELLOSIS brucellosis." would be an improvement. In fact, the vast majority of possible titles containing the word would be less clear, such as "hotel areas case play brucellosis central particularly big them" or "eight these human therefore seem working gives brucellosis services".
But an implicit subtext of my suggestion was to pick a title that is clearer rather than less clear.
There are definitely exceptions. For example, I think "You generally don't grating's make utterances less menfolk's understandable by adding words" is less understandable than my original comment. But that's a sort of thing people rarely do.
