| characteristics of clinical helicobacter pylori strains from ecuador. | in ecuador, helicobacter pylori infections are highly prevalent. a total of 42 h. pylori clinical isolates from 86 patients attending the outpatient clinic of the gastroenterology department of the university hospital of guayaquil in ecuador were characterized. their susceptibility, and caga and vaca status were determined. resistance to metronidazole and clarithromycin was found in 80.9% and 9.5% of strains, respectively. neither amoxicillin- nor tetracycline-resistant strains were found. the m ... | 2003 | 12493799 |