Clarithromycin versus metronidazole in first-line Helicobacter pylori eradication. Prospective randomized study of 85 Tunisian adults.

BACKGROUND: Although primary resistance to metronidazole remains high (56,8%), it is more widely used than clarithromycin as a firstline Helicobacter pylori (H. pylori) treatment in the common Tunisian practice. AIM: To compare the eradication rate in two protocols including clarithromycin versus metronidazole in Tunisian adults. METHODS: From July 2005 to December 2007, 85 patients aged 18 to 75 years presenting with gastro-duodenal lesions with H. pylori infection and requiring its eradication were included in the study. They were randomized to receive alternatively a seven-day triple therapy including: Omeprazole + Amoxicillin + Clarithromycin (OAC group) or Metronidazole (OAM group) twice a day. A second endoscopy with new biopsies was carried out 6 weeks after treatment to control eradication. RESULTS: Eighty five patients finished the protocol. The OAC and OAM groups included 46 and 39 patients respectively. They were comparable with respect to age, gender, clinical presentation and initial lesions. The total eradication rate was 60%. It was significantly higher in the clarithromycin group (69.6%) than in the metronidazole group (48.7%): p < 0.05. CONCLUSION: Clarithromycin is more effective than metronidazole in H. pylori eradication. It should be made available in our hospital's nomenclature. This would prevent iterative eradication courses and probably reduce treatment cost.

The role of quantitative HBsAg in the natural history of e antigen-negative chronic hepatitis B: A Tunisian prospective study.

BACKGROUND/AIMS: During the natural course of Chronic Hepatitis B (CHB) infection, differentiation between inactive carrier (IC) and HBeAg negative CHB is a subject of ongoing debate. We studied the role of hepatitis B surface antigen (HBsAg) level as a means of differentiating between CHB and IC in a group of untreated chronic HBeAg-negative HBV-infected patients. STUDY: A total of 115 HBeAg negative carriers were enrolled and followed up for>12 months; 78 as inactive carriers (IC), and 37 as active carriers (AC). Among ACs, patients were categorized according to the highest rate of viral load: AC1 (n=23), active carriers with persistent HBV-DNA<20,000 IU/mL; AC2 (n=14), active carriers with HBV-DNA>20,000 IU/mL. RESULTS: HBsAg levels were higher in AC compared to IC patients (1607 IU/ml vs. 225 IU/ml respectively, P=0.001). Among the AC group, the 23 AC1 cases had HBsAg levels significantly lower than the 14 AC2 patients (1756 IU/mL vs. 3327 IU/mL respectively; P<10-3). HBsAg showed weak correlation with HBV-DNA in the whole cohort (r=0.44, P<0.01). The suggested cutoff value of HBsAg titer to differentiate between the two groups was 938 IU/mL. Combined single-point quantification of HBsAg (938 IU/mL) and HBV DNA (2000 IU/mL) identified IC with 87.2% specificity and 91.7% positive predictive value. CONCLUSION: This study confirms the predictability of a one-time combined HBsAg and HBV DNA measurement for true inactive carriers requiring neither strict follow-up nor antiviral treatment.

Ciprofloxacin-containing versus clarithromycin-containing sequential therapy for Helicobacter pylori eradication: A randomized trial.

BACKGROUND AND STUDY AIMS: Helicobacter pylori eradication rates with standard triple therapy have declined to unacceptable levels. This randomized trial aimed at evaluating the efficacy of a ciprofloxacin containing sequential regimen in the eradication of H. pylori-infected patients vs. a clarithromycin containing sequential therapy. METHODS: A total of 212 patients were randomized into 14-day therapeutic schemes (106 patients per group): (1) clarithromycin-containing sequential therapy rabeprazole plus amoxicillin for 7 days, followed by rabeprazole plus clarithromycin plus metronidazole for 7 days, and (2) ciprofloxacin-containing sequential therapy using ciprofloxacin instead of clarithromycin. Eradication was confirmed by stool H. pylori antigen. Adverse effects and compliance were assessed by a questionnaire. RESULTS: Per protocol cure rates were as follows: 87.6 % in the ciprofloxacin-containing sequential therapy and 76 % in the clarithromycin group. Intention-to-treat cure rates were as follows: 73.5 % for the ciprofloxacin group and 66 % for the clarithromycin group. No differences in compliance or adverse effects were demonstrated among treatments. CONCLUSION: Ciprofloxacin-containing sequential therapy is more effective and equally safe compared to a clarithromycin-containing sequential therapy.

[Bowel preparation before colonoscopy]. / Préparation intestinale avant coloscopie.

Colonoscopy is a routinely performed procedure in adults. Completion of the procedure and proper visualization of the intestinal mucosa are highly dependent on the quality of the bowel preparation. The ideal bowel preparation should be safe, well-tolerated and effective. No bowel preparation method meets the ideal criteria for bowel-cleansing prior to colonoscopy. However, polyethylene glycol-electrolyte lavage solution and sodium phosphate are the most commonly used bowel preparations before colonoscopy and colon surgery. NaP preparations appear more effective and better tolerated than standard PEG solutions but should be administered with caution in patients with preexisting or at an increased risk for electrolyte disturbances. Timing and dose are important considerations regardless of the method used. The last generation of preparations improves safety and acceptability by reducing volume of liquid ingested.

[Duodenal ulcer disease and Ramadan]. / Maladie ulcéreuse duodénale et Ramadan.

Ramadan fasting is accompanied by an increase of the gastric acidity over 24 hours especially in the daytime. Gastric acidity is maximal at the end of the fasting day. So, a patient with duodenal ulcer is exposed to a high risk of disease reactivation. The frequency of ulcer complications is statistically higher during the month of Ramadan than the rest of the year. The frequency of the upper gastrointestinal hemorrhage is multiplied by 2 and perforation by 4. Helicobacter pylori eradication does not seem to play a role in the occurrence of these complications, particularly the perforation. The patient with duodenal ulcer can fast without risks while using a proton pump inhibitor if the ulcer is healed and H. pylori is eradicated. Ramadan fasting seems to us inadvisable when duodenal ulcer is active, but large prospective studies are needed.

Upper gastrointestinal bleeding in elderly patients in a Tunisian hospital: A retrospective study.

BACKGROUND AND STUDY AIMS: The older age group presents a major problem in the management of acute gastrointestinal bleeding with a relatively high mortality. The study aims to describe the background characteristics, causes and outcome of acute upper gastrointestinal bleeding in the elderly in Tunisia. PATIENTS AND METHODS: We retrospectively reviewed data of 401 patients aged≥60 years presenting with upper gastrointestinal bleeding. Information collected included history, physical examination findings, laboratory data, endoscopic findings and length of hospital stay. Patients were divided into two groups: group A (65-79 years) and group B (>79 years). RESULTS: Group A included 315 patients and group B 86 patients. There was a male preponderance in both groups. Co-morbidity (p<0.01) and use of non-steroidal anti-inflammatory drugs (NSAIDs) or anti-platelet drugs (p<0.01) were more common in group B. Oesophagitis was the cause of bleeding in 38.37% in group B, as compared with 19% in group A. The main cause of bleeding in group A was peptic ulcer. Rebleeding (6/86) and emergency surgery (1/86) were rare in group B and not different from those in group A. However, the bleeding-related mortality in the very elderly group was higher (13.9% vs. 4.76%; p=0.02). In multivariate analysis, only shock on admission was independently related to mortality (p=0.02). CONCLUSION: Oesophagitis is the major cause of upper gastrointestinal haemorrhage in the very elderly patients. While rebleeding and emergency surgery rates are relatively low, the bleeding-related mortality was higher in the very elderly group.