Pretreatment with urea-hydrochloric acid enhances the isolation of Helicobacter pylori from contaminated specimens.
نویسندگان
چکیده
Human saliva seeded with H. pylori was incubated in urea-HCl and then cultured on nonselective media. Pretreatment with 0.06 N HCl-0.08 M urea for 5 min at 37 degrees C resulted in reproducible isolation of H. pylori, even at low inocula (< or =10(2) CFU/ml of saliva), despite the presence of large numbers of contaminating organisms.
منابع مشابه
Primary isolation and detection of Helicobacter pylori from dyspeptic patients: a simple, rapid method.
The study aimed to develop a rapid and simple method for the primary isolation and detection of Helicobacter pylori from dyspeptic patients. Mucosal antral biopsy specimens were obtained from 136 consecutive dyspeptic patients diagnosed with peptic ulcer by endoscopy at Basra General Hospital, Iraq. From histopathological examination of biopsies, H. pylori was detected in 81 (59.6%) peptic ulce...
متن کاملInfluence of pretreatment with H2 receptor antagonists on the cure rates of Helicobacter pylori eradication
BACKGROUND Pretreatment with a proton pump inhibitor (PPI) reportedly decreases the efficacy of Helicobacter pylori (H. pylori) eradication, however, the effect of pretreatment with an H2 receptor antagonist (H2RA) on H. pylori eradication has not yet been studied. We compared the efficacy of eradication regimen (lansoprazole/amoxicillin/clarithromycin) in patients with H. pylori infection with...
متن کاملHelicobacter pylori is killed by nitrite under acidic conditions.
BACKGROUND Due to the expression of urease, Helicobacter pylori is able to establish itself in the human stomach under acidic conditions. A novel host defence mechanism was recently proposed, suggesting that the formation of salivary nitrite in symbiosis with facultative anaerobic bacteria in the oropharynx, is aimed at enhancing the antimicrobial activity of gastric juice. AIMS To investigat...
متن کاملDetermination of Antibiotic Resistance and Synergistic Effect of Multiple Antibiotics on Helicobacter Pylori Isolated from the Stomach Ulcer Biopsy Specimens
Abstract Background and Objective: Resistance of Helicobacter Pylori (H. pylori) to antibiotics is the main cause of relapse into Helcobacterial infections. With the use of several antibiotics that have synergistic effect, we can inhibit this antibiotic resistance. Thus, we aimed at determining resistance patterns and assessing the synergy of combining multiple antibiotics on H. pylori. ...
متن کاملHelicobacter Pylori and Rosacea: A case-control study
Background: The prevalence of Helicobacter pylori (H. pylori) infection in patients with rosacea is reported from 50 to 90 percent, which suggests the possibility of the role of this organism in pathogenesis of rosacea. Objectives: Evaluation of relationship between H. pylori infection and rosacea. Patients and Methods: In this case-control study, 30 patients referred to skin clinics of B...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Journal of clinical microbiology
دوره 39 5 شماره
صفحات -
تاریخ انتشار 2001