Search

The surgery is required in more than 80% of patients with Crohn's disease (CD). Studies before confirm the specific genetic variation of CD in the Tunisian population compared with the others ethnic groups.This article aims to study the epidemiological, anatomical and therapeutic principles of surgical forms of CD in a cohort of Tunisian patients.We report a retrospective study from January 1998 to September 2010 that studied 226 patients originated only from Tunisia (in North Africa), operated on for MC. We had been interested in epidemiological, anatomical, clinical, therapeutic, topographic progression of the disease, the procedure and the postoperative follow-up.The median age was 33 years. The average time between the onset of the disease and the surgical procedure was 31 months. The diagnosis of CD was established preoperatively in 213 patients (94%). The diagnosis was made intraoperatively because of an acute complication in 5 cases (2.2%) and postoperatively in 8 cases (3.5%). The most common location was the ileocecal junction in 184 cases (81.4%). Achieving the most common was the mixed form (stricture and fistula) in 123 cases (54.4%). Operative mortality was 0.04% (n = 1). Specific morbidity was 8.4% (n = 19). In long term, a surgical recurrence was noted in 17 patients (7.5%). In multivariate analysis the independent risk factors for surgical recurrence were: smooking (p = 0.012, ORs = 3.57) and post-operative medical treatment (p = 0.05, ORs = 2.6).Achieving stenosing and fistulizing the ileocecal junction is the most frequent surgical form in Crohn's disease. Our series is unique for a lower rate of the postoperative recurrence (7.5%).

HCV genotype 2 (HCV-2) has a worldwide distribution with prevalence rates that vary from country to country. High genetic diversity and long-term endemicity were suggested in West African countries. A global dispersal of HCV-2 would have occurred during the 20th century, especially in European countries. In Tunisia, genotype 2 was the second prevalent genotype after genotype 1 and most isolates belong to subtypes 2c and 2k. In this study, phylogenetic analyses based on the NS5B genomic sequences of 113 Tunisian HCV isolates from subtypes 2c and 2k were carried out. A Bayesian coalescent-based framework was used to estimate the origin and the spread of these subtypes circulating in Tunisia. Phylogenetic analyses of HCV-2c sequences suggest the absence of country-specific or time-specific variants. In contrast, the phylogenetic grouping of HCV-2k sequences shows the existence of two major genetic clusters that may represent two distinct circulating variants. Coalescent analysis indicated a most recent common ancestor (tMRCA) of Tunisian HCV-2c around 1886 (1869-1902) before the introduction of HCV-2k in 1901 (1867-1931). Our findings suggest that the introduction of HCV-2c in Tunisia is possibly a result of population movements between Tunisia and European population following the French colonization.

Today there is increasing evidence concerning the contribution of pro-/anti-inflammatory cytokine balance and genetic factors in hepatitis C pathogenesis and interindividual heterogeneity of disease outcome. In the current study, we investigated the influence of functionally described single nucleotide polymorphisms (SNPs) present in interferon-gamma (IFN gamma) and interleukin-10 (IL-10) genes, on chronic hepatitis C severity. IFN gamma (+874T/A) and IL-10 (-10826/A) genotypes were determined in 100 hepatitis C patients with different disease severities (chronic hepatitis, n = 42, liver cirrhosis [LC], and hepatocellular carcinoma in liver cirrhosis [HCC], n = 58) and 103 healthy controls using allele-specific polymerase chain reaction. No statistical differences in allele or genotype distributions of IFNy and IL-10 genes were observed between patients and controls. However, some significant differences in IFNy genotype frequencies were observed between the two groups of patients. IFN gamma(high producer) genotypes TT and TA were significantly more common in patients with LC and HCC (odds ratio = 2.65; p = 0.019). Although IL-10 genotypic frequencies were comparable between the different clinical forms of the disease, the combination of IFN gamma(low producer) and IFN gamma(high producer) genotypes was significantly associated with a lower risk of LC and HCC (odds ratio = 0.21; p = 0.015). In conclusion, our findings suggest that the imbalance between the pro-inflammatory and anti-inflammatory responses mediated by polymorphisms in the IFN gamma and IL-10 genes may influence the outcome of chronic HCV infection. (C) 2009 American Society for Histocompatibility and Immunogenetics. Published by Elsevier Inc. All rights reserved.

Peritoneal tuberculosis and carcinomatosis are the most frequent etiologies of exsudative ascitis and require rapid diagnosis and treatment. The purpose of this study has been to evaluate the predictive value of clinical and complementary data for the etiologic diagnosis of exsudative ascites and to assess the results of laparoscopic surgery.We report a prospective long-term study conducted over 10 years, having included all cases of exsudative ascites of unidentified etiology. We excluded patients with a history of anterior laparotomy and patients having a contraindication for laparoscopic surgery. Clinical signs, results of the cytochemical and bacteriological exam of the ascetic liquid and findings from radiological exams and endoscopic investigations were noted. Open laparoscopic exploration noted the macroscopic aspect and many peritoneal biopsies were obtained as well as a liver biopsy when possible. Statistical analysis was performed with SPSS10.0 software. The degree of statistical significance was set for P0.05.We included 90 cases of isolated exsudative ascites. There were 59 cases of tuberculosis and 31 of carcinomatosis. Mean patient age was 47 years with a sex ratio of 0.5. Bowel transit disorders were significantly in favor of a carcinomatosis (P=0.04) while fever and nocturnal sweats were suggestive of tuberculosis (P=0.04) but in both instances, the positive predictive value (PPV) of these two signs was weak, respectively 29% and 43%. Relative to chemical and cytologic study of ascitic fluid, hemorrhagic fluid, low white cell count, low lymphocyte differential and presence of atypical cells were significantly linked with the carcinomatosis (P=0.01) but with a PPV85%. Radiological exams were not very contributive for the etiologic diagnosis. The laparoscopic peritoneal aspect was typical of tuberculosis in 90% of proved cases and in 29% of carcinomatosis cases, underlying the importance of peritoneal biopsies for histological study. Hepatic tuberculosis was associated with peritoneal localisation in 48% of cases. We had no surgical mortality and the morbidity was about 1%.Etiological diagnosis of exsudative ascitis remains difficult to establish. Peritoneal biopsies under videolaparoscopy are currently the "gold standard" for diagnosis.

International audience; Background: Tunisia is classified as an area of middle endemic for hepatitis B virus (HBV) infection, however little is known about hepatitis Delta virus (HDV) infection. Objectives: This study aimed to address the prevalence of HDV infection, to identify possible risks factors, and to analyze the genetic diversity of HDV strains that are spreading in Tunisia. Study design: A retrospective large-scale study including 1615 HBsAg positive patients, native of the North East coast of Tunisia, recruited from Gastroenterology departments, was conducted. Demographic, epidemiological, ethnical, clinical and biological data were recorded. HBV and HDV serological analyses and DNA and RNA viral load quantification were performed. Genotyping of HBV and HDV strains was performed using nucleotide sequencing followed by phylogenetic analyses. Results: The study population included 819(50.7%) men and 796(49.3%) women; aged 12-90 years (mean age 41 + 13 years). A very low prevalence of HDV infection, 2% was observed. No risk factor, except a history of hospitalization for surgery was found. All HDV strains belonged to genotype 1, with a wide distribution within the HDV-1 group. They all share the African amino acid marker, a serine at position 202 of the large Delta protein. HBV genotypes were distributed as follows: HBV/D1 (56.8%), HBV/D7 (40.9%), and HBV/A2 (2.3%). Conclusion: Tunisia is a low endemic region for HDV infection, due to an efficient policy of HBV infection control. HDV-1 is the sole genotype found, with a high diversity within this group. Further studies are ongoing in order to better characterize and manage the HBV/HDV-infected patients according to the genetic variability of the viral strains. (C) 2015 Elsevier B.V. All rights reserved.

To study the value of the CT scan in the diagnosis of internal herniation and to evaluate its performance comparing its features to preoperative data.We report 3 cases of patients with internal hernias (two men and one woman whose age is 23, 45 and 60 years) hospitalised in emergency for a small bowel obstruction. There were no previous abdominal surgeries or trauma, The three patients underwent CT scan. Signs of tranmesenteric hernias and hernia through the falciform ligament were diagnosed preoperatively and confirmed at laparotomy.The internal hernia is rare cause of small bowel obstruction. The CT scan is an important way to make diagnosis and to choose the surgical strategy.

Peritoneal tuberculosis represents 0, 1 to 4% of all forms of tuberculosis.The aim of our study is to describe clinical, therapeutic characteristics and the outcome of peritoneal tuberculosis.Retrospective study of all cases of peritoneal tuberculosis diagnosed in gastroenterology B department - Rabta Hospital during a 12 years period (1996 to 2007).Forty three cases of peritoneal tuberculosis were included: 15 male and 28 female with mean age of 38years (extremes: 16 to 85years). Five patients were cirrhotic. Clinical manifestations were dominated by ascitis (83%). Ascitic fluid were exsudative in 97% of cases and lymphocytic in all cases. The diagnostic was based on coelioscopy with peritoneal biopsy in 26 cases demonstrating caseating granulomatous lesions in 64% of cases. Extra peritoneal tuberculosis was noted in 60, 4% dominated by pleuro-pulmonary localisations. Patients were given antituberculous therapy for a mean duration of 9, 8 months and the outcome was favourable in 93%.Peritoneal tuberculosis is still a medical problem in Tunisia. It is more common in young female. Diagnosis is based on the results of peritoneal biopsies during celioscopy. The outcome is good in most cases after antituberculous treatment.

Spontaneous intrahepatic portosystemic shunts are rare vascular anomalies that consist of a communication between the portal system and the systemic venous circulation. We report a case of a porto-caval shunt associated with chronic pericarditis.A 47-year-old patient with post pericarditis cirrhosis and without encephalopathy and hypoglycaemia. The shunt was tubular in its initial segment and aneurismal just before joining the vena cava.Spontaneous intrahepatic portosystemic shunt is a rare anomaly. Diagnosis can be made by Doppler ultrasound and helical CT.

Pyogenic liver abscesses are rare and severe. Early diagnosis and treatment lead to a better prognosis. Biliary cause of liver abscesses is the most frequent. Portal origin is secondary to a portal bactremia. Appendicitis was the most cause of portal infection, but actually, diverticulitis is most common.the aim of this study was to report a new case of pyogenic liver abscesses secondary to phlegmonous appendicitis.We report a case of 47 years old man presented with fever and weight loss without abdominal pain. Laboratory investigations show signs of inflammation with high leukocyte and neutrophile rates. The diagnosis of liver abscesses was made on abdominal ultrasound and tomodensitometry witch shows also an inflammatory appendix. The outcome was good after antibiotics associated with percutaneous drainage of abscesses and laparoscopic appendectomy witch found a phlegmonous appendix. One month later, the CT scan showed a markedly decrease of the size of the abscesses.

The aim of our study was to evaluate, the prevalence of Helicobacter pylori infection in duodenal ulcer tunisian patients not using non steroidal anti inflammatory drugs. Seventy eight patients having a non complicated duodenal ulcer and not using non steroidal anti inflammatory drugs were enrolled in this prospective study carried out between February 2000 and January 2001. Six gastric biopsies were undertaken in all patients; five for an histologic analysis and one for urease test. A serum sample was taken for a Helicobacter pylori serology. Patients were considered infected if two tests were positive. Helicobacter pylori infection was present in 77 patients (98.7%). Helicobacter pylori infection is still high among patients with a non complicated duodenal ulcer and not using non steroidal anti inflammatory drugs suggesting an empirical Helicobacter pylori eradication therapy in this group of patients.

Background Distinct virulence factors of H. pylori have been described: the vaculating cytotoxin (vacA), the cytotoxin associated gene (cagA), the induced by contact with epithelium factor Antigen (iceA gene) and the outer membrane protein oipA. In Tunisia, there are no data regarding the pattern of H. pylori genotypes; therefore, this prospective and multicentre study was the first to be done in Tunisia and aimed to investigate the prevalence of the vacA, cagA, iceA and oipA genotypes of H. pylori isolates from Tunisian patients with peptic ulceration, gastric cancer, MALT lymphoma and gastritis. Methods H. pylori was cultured from endoscopic biopsies obtained from 281 Tunisian patients. The vacA alleles, cagA, iceA and oipA genotypes were determined by PCR. Results The vacA s1m1, s1m2 and s2m2 were respectively found in 10.7%, 12.5% and 45.6% of strains. The s2m1 genotype was not detected in our study. The cagA was found in 61.6% of isolates. The iceA1 and the iceA2 genotypes were respectively isolated in 60.2% and in 16% of strains. The oipA genotype was detected in 90.8% of strains. Considering the vacA and iceA genotypes, the presence of multiple H. pylori strains in a single biopsy specimen was found respectively in 31.4% and 23.8%. The comparison between strains isolated from antrum and fundus showed that Tunisian patients were infected with two or more strains of different cagA, vacA, iceA and oipA genotypes and the discordance was respectively in 9.6%, 4.6%, 8.9% and 8.5% of strains. Conclusion Our results showed that in 46% (131 strains among 281), the H. pylori strains were highly virulent in relation of the three or four virulent factors they could carry. These finding were described before in the literature. Tunisian patients were colonized by one or multiple strains of H. pylori in the same time in relation of presence of vacA m1/m2 and iceA1/iceA2 in the same biopsy. The discordance between strains isolated from antrum and fundus was high, and it is in favour of multicolonization.

Background The frequency of primary resistance to antibiotics in H. pylori isolates is increasing worldwide. In Tunisia, there are limited data regarding the pattern of H. pylori antibiotic primary resistance. Aim To evaluate the primary resistance of H. pylori to clarithromycin, metronidazole and amoxicillin and to detect the mutations involved in clarithromycin resistance. Materials and methods 273 strains isolated from adults and children were enrolled. The primary resistance to clarithromycin, metronidazole and amoxicillin was evaluated by means of E-test minimal inhibitory concentration (MIC). The real-time PCR using Scorpion primers was performed in all cases to assess clarithromycin primary resistance and point mutations involved. Results No resistance to amoxicillin was detected. For adults, resistance to clarithromycin and metronidazole was found respectively in 14.6% and 56.8%, and respectively in 18.8% and 25% in children. Overall, the rates of global primary resistance to clarithromycin and metronidazole in Tunisia were respectively determined in 15.4% and 51.3%. By the use of Scorpion PCR, the A2143G was the most frequent point mutation observed (88.1%), followed by the A2142G (11.9%); the A2142C was not found and 18 of 42 patients (42.8%) were infected by both the resistant and the susceptible genotype. The association of clarithromycin resistance with gender was not statistically significant, but metronidazole resistant strains were isolated more frequently in females (67.8%) than in males (32.2%) and the difference was significant. As for gastroduodenal diseases, the difference between strains isolated from patients with peptic ulceration and those with non peptic ulceration was not statistically significant. When about the distribution of resistant strains to clarithromycin and metronidazole between the three Tunisian cities (Tunis, Menzel Bourguiba and Mahdia), the difference was not statistically significant. Conclusion Local data regarding the primary resistance of H. pylori to clarithromycin, metronidazole and amoxicillin and the main genetic mutation involved in clarithromycin resistance in vivo (A2143G) are necessary to prove a clear need for a periodic evaluation of antibiotic consumption and new therapeutic strategies in Tunisia in order to avoid the emergence of resistant strains.