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      In Vitro and In Vivo Anti- Helicobacter Activities of Eryngium foetidum (Apiaceae), Bidens pilosa (Asteraceae), and Galinsoga ciliata (Asteraceae) against Helicobacter pylori


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          This study was performed to evaluate the antimicrobial activities of extracts of Bidens pilosa, Galinsoga ciliata, and Eryngium foetidum against 6 clinical strains of Helicobacter pylori in vitro and in vivo. Broth microdilution method was used in vitro. In vivo, Swiss mice were inoculated with H. pylori and divided into 5 groups; the control group received the vehicle and the four others received 125, 250, and 500 mg/kg of methanol extract of Eryngium foetidum and ciprofloxacin (500 mg/kg) for 7 days, respectively. Helicobacter pylori colonization and number of colonies in gastric biopsies culture were assessed on days 1 and 7 after treatment. The lowest MIC value (64  μg/mL) and the best spectrum of bactericidal effect (MBC/MIC = 1) were obtained with the methanol extract of Eryngium foetidum. The number of H. pylori infected animals was 17% (plant-extract) and 0% (ciprofloxacin) compared to 100% for the infected untreated group. Plant-extract (381.9 ± 239.5 CFU) and ciprofloxacin (248 ± 153.2 CFU) significantly reduced bacterial load in gastric mucosa compared to untreated, inoculated mice (14350 ± 690 CFU). Conclusion. The present data provided evidence that methanol extract of Eryngium foetidum could be a rich source of metabolites with antimicrobial activity to fight Helicobacter pylori infections.

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          Helicobacter pylori: epidemiology and routes of transmission.

          H. pylori is a common bacterium, and approximately 50 percent of the world's population has been estimated to be infected (198). Humans are the principal reservoir. The prevalence of H. pylori infection varies widely by geographic area, age, race, ethnicity, and SES. Rates appear to be higher in developing than in developed countries, with most of the infections occurring during childhood, and they seem to be decreasing with improvements in hygiene practices. H. pylori causes chronic gastritis and has been associated with several serious diseases of the gastrointestinal tract, including duodenal ulcer and gastric cancer. Since its "discovery" in 1982 by Warren and Marshall (1), H. pylori has been the topic of extensive research. A number of studies have used questionnaire components to investigate factors possibly related to the etiology of H. pylori infection. The majority of recent studies have not found tobacco use or alcohol consumption to be risk factors for H. pylori infection. Adequate nutritional status, especially frequent consumption of fruits and vegetables and of vitamin C, appears to protect against infection with H. pylori. In contrast, food prepared under less than ideal conditions or exposed to contaminated water or soil may increase the risk. Overall, inadequate sanitation practices, low social class, and crowded or high-density living conditions seem to be related to a higher prevalence of H. pylori infection. This finding suggests that poor hygiene and crowded conditions may facilitate transmission of infection among family members and is consistent with data on intrafamilial and institutional clustering of H. pylori infection. Understanding the route of H. pylori transmission is important if public health measures to prevent its spread are to be implemented. Iatrogenic transmission of H. pylori following endoscopy is the only proven mode. For the general population, the most likely mode of transmission is from person to person, by either the oral-oral route (through vomitus or possibly saliva) or perhaps the fecal-oral route. The person-to-person mode of transmission is supported by the higher incidence of infection among institutionalized children and adults and the clustering of H. pylori infection within families. Also lending support to this concept is the detection of H. pylori DNA in vomitus, saliva, dental plaque, gastric juice, and feces. Waterborne transmission, probably due to fecal contamination, may be an important source of infection, especially in parts of the world in which untreated water is common. Recent studies in the United States have linked clinical H. pylori infection with consumption of H. pylori-contaminated well water. This area of research is worthy of further investigation. Although H. pylori has been isolated in domestic cats, additional research has suggested that H. pylori is probably uncommon in domestic cats and thus is probably not a major concern for cat owners. Several studies have suggested sheep as a possible source of H. pylori transmission, a hypothesis that deserves additional investigation. The most recent reservoir suggested for H. pylori transmission is the housefly. However, evidence is lacking that H. pylori can be transmitted to humans from flies that have been in contact with H. pylori-infected feces. Nevertheless, the hypothesis is appealing since flies are known to carry many other infectious diseases. Knowledge of the epidemiology and mode of transmission of H. pylori is important to prevent its spread and may be useful in identifying high-risk populations, especially in areas that have high rates of gastric lymphoma, gastric cancer, and gastric ulcer.
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            Role of Helicobacter pylori infection and non-steroidal anti-inflammatory drugs in peptic-ulcer disease: a meta-analysis.

            The relation between H pylori infection and use of non-steroidal anti-inflammatory drugs (NSAIDs) in the pathogenesis of peptic-ulcer disease is controversial. We undertook a meta-analysis to address this issue. By computer and manually we sought observational studies on the prevalence of peptic-ulcer disease in adult NSAID takers or the prevalence of H pylori infection and NSAID use in patients with peptic-ulcer bleeding. Summary odds ratios were calculated from the raw data. Tests for homogeneity were done. Of 463 citations identified, 25 studies met inclusion criteria. In 16 studies of 1625 NSAID takers, uncomplicated peptic-ulcer disease was significantly more common in patients positive than in those negative for H pylori (341/817 [41.7%] vs 209/808 [25.9%]; odds ratio 2.12 [95% CI 1.68-2.67]). In five controlled studies, peptic-ulcer disease was significantly more common in NSAID takers (138/385 [35.8%]) than in controls (23/276 [8.3%]), irrespective of H pylori infection. Compared with H pylori negative individuals not taking NSAIDs, the risk of ulcer in H pylori infected NSAID takers was 61.1 (9.98-373). H pylori infection increased the risk of peptic-ulcer disease in NSAID takers 3.53-fold in addition to the risk associated with NSAID use (odds ratio 19.4). Similarly, in the presence of risk of peptic-ulcer disease associated with H pylori infection (18.1), use of NSAIDs increased the risk of peptic-ulcer disease 3.55-fold. H pylori infection and NSAID use increased the risk of ulcer bleeding 1.79-fold and 4.85-fold, respectively. However, the risk of ulcer bleeding increased to 6.13 when both factors were present. Both H pylori infection and NSAID use independently and significantly increase the risk of peptic ulcer and ulcer bleeding. There is synergism for the development of peptic ulcer and ulcer bleeding between H pylori infection and NSAID use. Peptic-ulcer disease is rare in H pylori negative non-NSAID takers.
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              Cameroonian Medicinal Plants: Pharmacology and Derived Natural Products

              Many developing countries including Cameroon have mortality patterns that reflect high levels of infectious diseases and the risk of death during pregnancy and childbirth, in addition to cancers, cardiovascular diseases and chronic respiratory diseases that account for most deaths in the developed world. Several medicinal plants are used traditionally for their treatment. In this review, plants used in Cameroonian traditional medicine with evidence for the activities of their crude extracts and/or derived products have been discussed. A considerable number of plant extracts and isolated compounds possess significant antimicrobial, anti-parasitic including antimalarial, anti-proliferative, anti-inflammatory, anti-diabetes, and antioxidant effects. Most of the biologically active compounds belong to terpenoids, phenolics, and alkaloids. Terpenoids from Cameroonian plants showed best activities as anti-parasitic, but rather poor antimicrobial effects. The best antimicrobial, anti-proliferative, and antioxidant compounds were phenolics. In conclusion, many medicinal plants traditionally used in Cameroon to treat various ailments displayed good activities in vitro. This explains the endeavor of Cameroonian research institutes in drug discovery from indigenous medicinal plants. However, much work is still to be done to standardize methodologies and to study the mechanisms of action of isolated natural products.

                Author and article information

                Biomed Res Int
                Biomed Res Int
                BioMed Research International
                Hindawi Publishing Corporation
                18 August 2016
                : 2016
                : 2171032
                1Microbiology and Pharmacology Laboratory, Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
                2Gastroenterology Department, Laquintinie Hospital of Douala, P.O. Box 4035, Douala, Cameroon
                Author notes
                *Laure brigitte Kouitcheu Mabeku: laurebkouitcheu@ 123456yahoo.fr

                Academic Editor: Gail B. Mahady

                Author information
                Copyright © 2016 Laure brigitte Kouitcheu Mabeku et al.

                This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                : 7 June 2016
                : 31 July 2016
                Research Article


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