bead: a small ball with a hole through the middle
jewelry: an adornment (as a bracelet or ring or necklace) made of precious metals and set with gems (or imitation gems)
heliobacter pylori: the type species of genus Heliobacter; produces urease and is associated with several gastroduodenal diseases (including gastritis and gastric ulcers and duodenal ulcers and other peptic ulcers)