title: Helicobacter pylori infection in elderly Bulgarian patients.
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Lyudmila
authors: L
authors: Boyanova
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Nikolai
authors: N
authors: Katsarov
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Galia
authors: G
authors: Gergova
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Rossen
authors: R
authors: Nikolov
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Sirigan
authors: S
authors: Derejian
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Zoya
authors: Z
authors: Spassova
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Ivan
authors: I
authors: Mitov
authors: Department of Microbiology, Medical University of Sofia, Sofia, Bulgaria 2Second Surgery Department of Alexander Hospital, Sofia, Bulgaria 3Department of Gastroenterology, University Hospital 'St Ivan Rilski', Sofia, Bulgaria.
authors: Zacharii
authors: Z
authors: Krastev
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002031:Bulgaria / Q000453:epidemiology; D024881:Drug Resistance, Bacterial; D016481:Helicobacter Infections / Q000188:drug therapy / Q000453:epidemiology*; D016480:Helicobacter pylori / Q000187:drug effects; D006801:Humans; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D015995:Prevalence