Ciguatera fish poisoning (CFP) is the most common reported illness caused by marine biotoxin in food. It is caused by eating fish that have accumulated ciguatoxins (CTXs) due to feeding on toxic microalgae (Gambierdiscus spp. and Fukuyoa spp.)
Fleas are ectoparasitic blood-sucking insects with the ability to jump, which commonly infest wild and domestic animals (mainly dogs and cats) but also humans.
Meningococcal disease is caused by Neisseria meningitidis, a bacterium with human carriers as the only reservoir. It is carried in the nose, where it can remain for long periods without producing symptoms.