Excite Bullets

The Excite Bullets are a type of ammo used by the Beasts Pirates, and invented by one of their top officers, Queen.

Overview
The Excite Bullets were designed by "Queen the Plague" of the Beasts Pirates to spread an infectious disease called "Mummy" upon contact with the hit target, thus allowing for a wider range of effect, as well as an increased casualties.

There is a cannonball version of the bullet called the Excitement Shell, which contains 200 shots worth of Excite bullets. Babanuki tried to use it against Luffy and his allies only for Luffy to tangle his elephant's trunk, causing it to explode in his chest.

Effect
After being hit, the target will have an odd mark on their neck, and their fever will rise exceedingly fast. Following that, anyone who makes contact with the infected will suffer the same effects, becoming a medium for the infection themselves.