Helicobacter pylori is a gram-negative, spiral-shaped, microaerophilic organism that colonizes the stomach of humans and causes chronic-active gastritis, peptic ulcer disease, and gastric cancers, including adenocarcinoma of the stomach and MALT (mucosal-associated lymphoid tumor) lymphomas. H. pylori colonizes the stomach of over 50 % the world’s human population, primarily those who reside in...

Furunculosis is a serious, septicemic, bacterial disease found principally in salmonid fishes. but it may also occur in goldfish and other cyprinids. The common name of the disease is derived from the presence of “blisters” or furuncules on the surface of chronically infected salmonids (Snieszko and Bullock 1975). However, this sign is not diagnostic of this disease inasmuch as it may be encoun...