(مركز النيلين الطبي, 2015) Sheema Mohsin Mustafa; Ahmed Bolad
Literature review:
Helicobacter pylori was first isolated by Warren and Marshall (Warren et al., 1983) in 1982 it was linked with chronic antral gastritis and peptic ulceration, at first they named the bacterium as Campylobacter pyloridis, later on it was renamed as Helicobacter pylori (Warren et al. 1984).
The genus Helicobacter belongs to the subdivision of the Proteobacteria, order Campylobacterales, family Helicobacter-aceae. The genus Helicobacter consists of over 20 recognized species (Fox, 2002). Members of the genus Helicobacter are all microaerophilic organisms and in most cases are catalase and oxidase positive, and many but not all species are also ureases positive.
Helicobacter species can be subdivided into two major lineages, the gastric Helicobacter species and the enterohepatic (nongastric) Helicobacter species. Both groups demonstrate a high level of organ specificity, such that gastric helicobacters in general are unable to colonize the intestine or liver, and vice-versa.
