Mosquitoes are vampires of the insect world.
Sloppy syntax, on the other hand, is a vampire of the grammatical world.
A hyphen could have plunged a stake through the heart of this headline vampire:
West Nile Virus-Carrying Mosquito
That would have created a cumbersome construction, though.
The easier way to vanquish the bloodsucker would have been to simply rearrange the word order (the syntax):
Mosquito Carrying West Nile Virus
Like magic, the monster mosquito vanishes.
You might even say that proper syntax is like a monster mash.
Or is that Monster Mash?