Bordetella pertussis

Etymology
Bordetella pertussis:

bordetella: "Bordet" (named for its discoverer, microbiologist Jules Bordet)

per: "thoroughly" (from latin per, meaning "thoroughly", "by", and a number of other words)

tussis: "cough" (from latin tussis, meaning "cough"), we also see this word in "antitussive drugs" which prevent coughing.

Explanation
The bacteria Bordetella pertussis, discovered by Jules Bordet (bordetella) produces a toxin which results in a chonic cough (tussis), which is incredibly severe, lasting for weeks, and being thoroughly (per) debilitating. It is also called "whooping cough", because children with this cough, after finishing a bout of coughing, produce a high-pitched "whoop" sound when they inhale.

Synonyms
Whooping cough