61. Universite Claude Bernard LYON1 - Ecole Doctorale E2M2 - Translate this page helicobacter pylori. Rédacteurs S. Mercier. Anciens documents xxx, exemple de lien, zzz. Nom scientifique helicobacter pylori. Nom commun. Mots clés. http://lyon-sud.univ-lyon1.fr/bacterio-viro/DESLYON/Fiches/chapitre1/Helicobacte

Collège de Bactériologie-Virologie @ CHU de LYON et Université LYON1 Intro Fiches Bactéries Virus Liens ... Site DES Fiches Bactéries Pages Chapitre Bacillus cereus Bartonella Borrelia burgdorferi Brucella ... Vibrio cholerae Liens UMR 5558 Helicobacter pylori Rédacteurs : S. Mercier Anciens documents : xxx, exemple de lien , zzz Nom scientifique: Helicobacter pylori Nom commun Mots clés Ulcère gastro-duodénal, carcinome gastrique, lymphome gastrique du MALT. Caractéristiques Morphologie Bacille à Gram négatif spiralé dans les prélèvements, forme bacillaire, en U ou en O sur culture, coccoïde sur milieu pauvre, mobile par des flagelles polaires. Facteurs d'adhésion pour les cellules antrales de l'estomac humain. Culture Croissance en 3 à 12 jours en primoculture, en 2 à 4 jours sur subculture. Culture sur milieux de type gélose au sang Oui, Muller-Hinton, Colombia + 10% sang Milieux spéciaux Milieu sélectif : Skirrow Particularités culturales identifiées Température optimale de croissance 37°C (pas 42°C) Atmosphère utilisée habituellement - exigences d'environnement gazeux Microaérophilie Caractères de base Catalase + ; Oxydase + ;

62. Risks And Causes But there is no firm evidence that they cause cancer in humans. helicobacter pylori This is a bug that has been investigated a lot in the past few years. http://www.cancerhelp.org.uk/help/default.asp?page=3903

63. Health Report - 11/10/99: Helicobacter Pylori Recently published results of a trial to get rid of the ulcer germ helicobacter pylori in people who had non ulcer dyspepsia. http://www.abc.net.au/rn/talks/8.30/helthrpt/stories/s58721.htm

Radio National with Norman Swan Helicobacter pylori Monday 11 October 1999 Summary: Recently published results of a trial to get rid of the ulcer germ Helicobacter pylori in people who had non ulcer dyspepsia. Norman Swan: OK then, there's your first chance to test drive some of these ideas. The guinea pig is Nick Talley, who's Professor of Medicine at the University of Sydney at Nepean. He and his colleagues have published a paper in this week's edition of the prestigious New England Journal of Medicine It reports the results of a trial to get rid of the ulcer germ Helicobacter pylori in people who had what's called 'non ulcer dyspepsia.' Nick Talley: It's a symptom complex where people have pain or discomfort and that can include nausea or belching sometimes, bloating, fullness. And they've had these symptoms usually chronically for a long time, and they're troubled by them. And these symptoms are not explained by a peptic ulcer or any other obvious structural cause when specific testing is done. Norman Swan: And it's quite common, isn't it?

64. The Gut Foundation helicobacter pylori. What is it? helicobacter pylori is a common bacterial infection that affects the stomach. Its association http://www.gut.nsw.edu.au/free2.htm

Infant Colic Helicobacter Pylori Undearstanding Lactose Intokerance Am I at risk? Helicobacter pylori . What is it? Helicobacter pylori is a common bacterial infection that affects the stomach. Its association with disorders of the stomach was first discovered in Australia in the early 1980s, and was a major breakthrough in understanding and treating peptic ulcer. Until that time, peptic ulcer was thought to be due to too much acid in the stomach. The treatment then was to give drugs that reduced the stomach's acid production. This is still effective treatment. However, the discovery that eliminating the Helicobacter pylori bacteria cured the ulcer in most people meant that many no longer needed to keep taking drugs to reduce stomach acid. Where does it come from? Helicobacter pylori is one of the most common bacterial infections throughout the world. How common is it? In Australia, Helicobacter pylori infection is often acquired in late childhood. By age 30, one in five people have it, and by age 60, almost half the population is affected. Symptoms The most common symptom is indigestion. However, having the Helicobacter pylori bacteria doesn't necessarily mean you will have indigestion, and having indigestion due to too much acid doesn't necessarily mean you have the bacteria.

65. Helicobacter Pylori Research Laboratory Barry Marshall helicobacter pylori Research Laboratory. The new helicobacter pylori laboratory is dedicated to the study of Helicobacters in humans and animals. http://www.hpylori.com.au/

Helicobacter pylori Research Laboratory Mission, Affiliation, Location: The new Helicobacter pylori laboratory is dedicated to the study of Helicobacters in humans and animals. The laboratory is affiliated with the University of Western Australia School of Biomedical and Chemical Sciences and is located on the QEII Medical Centre site, 1k from the University Campus at Sir Charles Gairdner Hospital in Perth Western Australia. The laboratory has close ties to the University Department of Microbiology collaborates in its clinical activities with The Division of Gastroenterology and PathCentre Laboratories Links Our FTP site H.pylori Picture Book Prof. Barry Marshall's Current Home Page. Recent controversial article in New Scientist. ... The Gastroman Endoscopy Game Contact Numbers: // Change User Name and Domain Name username="admin" at=""@ domainname="hpylori.com.au" document.write("HP Laboratory Email") Office: Lab: Fax: SCGH Contacts: Public Relations Office: (press enquiries) T: +61-8-9346-2404 F: +61-8-9346-2560 Gastroenterology Office: (professional and patient enquiries) T: +61-8-9346-2031 F: +61-8-9346-2702 Mailing Address: (call first before sending specimens) Helen Windsor Ph.D.

66. Medmicro Chapter 23 helicobacter pylori and other Gastric Helicobacterlike Organisms. Clinical Manifestations. helicobacter pylori and other Gastric Helicobacter-Like Organisms. http://gsbs.utmb.edu/microbook/ch023.htm

Campylobacter and Helicobacter Guillermo I. Perez-Perez Martin J. Blaser General Concepts Campylobacter Jejuni and other Enteric Campylobacters Clinical Manifestations Campylobacter species cause acute gastroenteritis with diarrhea, abdominal pain, fever, nausea, and vomiting. Recently, Campylobacter infections have been identified as the most common antecedent to an acute neurological disease, the Guillain-Barré syndrome. Structure Campylobacter species are Gram-negative, microaerophilic, non-fermenting, motile rods with a single polar flagellum; they are oxidase-positive and grow optimally at 37° or 42°C. Classification and Antigenic Types Campylobacter species have many serogroups, based on lipopolysaccharide (O) and protein (H) antigens. However, only a few serogroups account for most human isolates in a given geographic region. C jejuni possesses several common surface-exposed antigens, including porin protein and flagellin. Pathogenesis The bacteria colonize the small and large intestines, causing inflammatory diarrhea with fever. Stools contain leukocytes and blood. The role of toxins in pathogenesis is unclear. C jejuni antigens that cross-react with one or more neural structures may be responsible for triggering the Guillian-Barre syndrome.

67. Helicobacter Pylori : Sites Et Documents Francophones Translate this page Arborescence(s) du thesaurus MeSH contenant le mot-clé helicobacter pylori helicobacter pylori comment éradiquer helicobacter pylori ? http://www.chu-rouen.fr/ssf/organ/helicobacterpylori.html

Helicobacter pylori Menu général CISMeF Définition [VIDAL de la famille] : Bactérie fréquemment présente dans les ulcères de l'estomac ou du duodénum. Elle empêche la guérison et favorise les récidives à l'arrêt du traitement antiulcéreux. Son éradication permet des guérisons définitives. Le traitement associant un antiulcéreux à des antibiotiques constitue un progrès important pour les malades souffrant d'ulcère chronique de l'estomac ou du duodénum. Définition F édération N ationale des C entres de L utte C ontre le C ancer] : http://www.fnclcc.fr/fr/patients/dico/definition.php?id_definition=699 Synonyme(s) MeSH Campylobacter pylori Voir aussi helicobacter, infection Arborescence(s) helicobacter pylori helicobacter pylori organismes : invertébrés, vertébrés, bactéries, virus, algues et champignons, plantes, archéobactéries Position du mot-clé dans l' (les) arborescence(s) : Vous pouvez consulter toutes les ressources ou seulement les principales ou utiliser l' outil de recherche les recommandations les documents concernant l' enseignement les documents destinés aux patients Ou consulter ci-dessous une sélection des principales ressources : guide Guide pour le développement des régimes thérapeutiques visant à éradiquer Helicobacter Pylori dans les maladies gastro-intestinales [Site éditeur Santé Canada ; pays : Canada ; langue : français ; format : pdf ; accès : gratuit ; non parrainé ; daté de : 1999 ; visité le : 06/12/2000].

68. Disease Category Listing (76): Helicobacter Pylori Clinical Trials helicobacter pylori. Georgia. Marietta; Radiant Research Atlanta West Are you or a loved one interested in participating http://www.centerwatch.com/studies/CAT76.HTM

Clinical Trials: Helicobacter Pylori Georgia Marietta; Radiant Research - Atlanta West Are you or a loved one interested in participating in a clinical trial for Helicobacter Pylori? Texas San Antonio; Radiant Research - San Antonio Are you or a loved one interested in participating in a clinical trial for Helicobacter Pylori? Back to Clinical Trials by Medical Areas Research centers specializing in this illness area Additional resources ... in this illness area This site is run by CenterWatch, a publishing company that focuses on the clinical trials industry. The information provided in this service is designed to help patients find clinical trials that may be of interest to them, and to help patients contact the centers conducting the research. CenterWatch is neither promoting this research nor involved in conducting any of these trials. Trial listing updated: May 21, 2004 at 2:27:54 PM Patient Resources: [ Trial Listing Notification Services Drug Directories About Clinical Research ... Patient Bookstore Professional Resources: [ Research Center Profiles Industry Provider Profiles Industry News Professional Resources ... Professional Bookstore General: [ Search Site Map Your Privacy CW World ... Home This site was developed in association with Illumina Interactive of Boston, MA

69. GSDL Helicobacter Pylori Assessment Great Smokies Diagnostic Laboratory s helicobacter pylori test uses the most efficient and economical detection methods available to identify this hidden cause http://www.gsdl.com/assessments/heliobacter/

GSDL Resources News Assessments ... Clinician Support Search GSDL Find Assessments: by system Gastrointestinal Immunology Nutritional Endocrinology Metabolic by condition ADD AIDS Alzheimers Autism Cardiovascular Cystic Fibrosis Depression Fatigue Fibromyalgia Headache Hyperactivity IBD Indigestion Lactose Intolerance Male Infertility Memory Multiple Sclerosis Osteoarthritis Osteoporosis PMS Rheumatoid Arthritis Sexual Dysfunction Skin Disorder Sleep Disorder Type 2 Diabetes Weight by test focus Adrenocortex Allergy Amino Acids Bacterial Overgrowth Bone Resorption Cardiovascular CDSA Cellular Energy Detoxification Elemental Estrogen Metabolism Fatty Acids Female Hormones Helicobacter Pylori Intestinal Permeability Lactose Intolerance Male Hormones Melatonin Menopause Metabolic Analysis Oxidative Stress Parasites Thyroid Toxic Clearance Toxic Exposure Vaginosis Women's Hormonal Helicobacter Pylori Assessment: Stool Antigen or Antibody Assay Application Guide FAQ Order More than 12 million Americans suffer from conditions such as duodenal ulcers, peptic ulcers, and chronic gastritisconditions directly related to the presence of Helicobacter pylori bacteria in the digestive tract. What's more

70. Helicobacter Pylori Infection In Children : Recommendations For Diagnosis And Tr Practice Guideline Endorsement. helicobacter pylori Infection in Children Recommendations for Diagnosis and Treatment. Abstract http://www.aap.org/policy/helicpylori.html

Practice Guideline Endorsement Helicobacter pylori Infection in Children : Recommendations for Diagnosis and Treatment. Abstract: The American Academy of Pediatrics endorses and accepts as its policy the Helicobacter pylori Infection in Children : Recommendations for Diagnosis and Treatment. The Guidelines are available as a PDF file from the The North American Society for Pediatric Gastroenterology, Hepatology and Nutrition Web site free-of-charge at: http://www.naspghan.org/sub/position_papers/00005176_200011000_00007.pdf Adobe Acrobat PDF format) The recommendations in this statement do not indicate an exclusive course of treatment or serve as a standard of medical care. Variations, taking into account individual circumstances, may be appropriate. Return to AAP Policy Statements - Table of Contents

71. Helicobacter Pylori Infection - Patient UK helicobacter pylori Infection. helicobacter pylori (commonly just called H. pylori) is a bacterium (bug). It can infect the lining of the stomach and duodenum. http://www.patient.co.uk/showdoc.asp?doc=23068756

72. HELICOBACTER The mechanisms for pathogenesis are not well understood at this time, but the circumstantial evidence points to helicobacter pylori as the causative agent. http://medic.med.uth.tmc.edu/path/00001505.htm

HELICOBACTER The Helicobacter genus features Gram-negative, micraerophilic organisms that are very similar to organisms of the Campylobacter genus. Both species are motile, catalase-positive, and have curved cell bodies. When you think of Helicobacter , the first thing that should come to your mind is stomach ulcers. That is because this organism is the leading cause of peptic ulcers and chronic gastritis in America. The mechanisms for pathogenesis are not well understood at this time, but the circumstantial evidence points to Helicobacter pylori as the causative agent. Infected patients can be treated with an antacid as well as tetracycline to treat the ulcers and inhibit the growth of the organism. The microaerophilic nature of Helicobacter means that it requires a low oxygen concentration and a relatively high carbon dioxide concentration. Sufficient colony growth can be seen in three days when the organism is plated onto Brucella -sheep blood agar and placed in a microaerophilic environment. A Gram-stain will reaveal weakly stained rod with a unique curvature. Helicobacter pylori is also strongly urease-positive, which may help in identification.

73. Helicobacter Pylori & Peptic Ulcers helicobacter pylori What is helicobacter pylori? helicobacter pylori (H. pylori) is a bacterium (germ) that lives in the inner lining of the stomach. http://www.nevdgp.org.au/geninf/gastro/Helicobacterpylori.htm

AUSTRALIAN GASTROENTEROLOGY INSTITUTE (educational arm of the Gastroenterological Society of Australia) Website: www.gesa.org.au ... Copies reviewed November 2001 HELICOBACTER PYLORI What is Helicobacter pylori? Helicobacter pylori (H. pylori) is a bacterium (germ) that lives in the inner lining of the stomach. It produces a number of chemicals that damage the lining of the stomach. Once the infection is present, it persists for many years, if not for life. How common is Helicobacter pylori infection in Australia? About 40% of persons over 40 years of age are infected with this germ compared to less than 10% of children. Most people are infected in childhood and in Australia the risk of becoming infected is now much less than in the past. There is no difference in infection rate between men and women. H. pylori is more common in older people and in certain ethnic populations (eg. Middle Eastern, Asian and Eastern European). In general the germ is more common in people from a poorer background, people living in institutions (eg. mentally handicapped) and those who have migrated from countries where infection is more common, especially the developing world. However, any individual may be infected. How do I get it?

74. Helicobacter Pylori helicobacter pylori. bmj.com collected resources helicobacter pylori. Collected resources on helicobacter pylori from the online British Medical Journal. http://omni.ac.uk/browse/mesh/C0079488L0079488.html

low graphics Helicobacter pylori bmj.com collected resources : helicobacter pylori Collected resources on Helicobacter pylori from the online British Medical Journal. BMJ collections list the most recent articles from the BMJ and other online journals within the BMJ Publishing Group, within a specific subject or specialty. Links are provided to the full-text of the document. Links are also provided to related collections, journals, books or reviews. Helicobacter pylori Collected Works [Publication Type] Helicobacter pylori and peptic ulcer This report by Andrew Moore is a systematic review of the effectiveness of curing infection of helicobacter pylori, and an overview of the possible economic benefits of implementing what is known to be effective. Topics covered include the methods of diagnosing helicobacter pylori infection, prevalence and incidence of peptic ulcers, helicobacter pylori eradication and peptic ulcers, and clinical guidelines on helicobacter pylori. This report was originally published as an article in Bandolier, December 1994. This expanded version is a Bandolier Internet Publication. Peptic Ulcer Helicobacter pylori Helicobacter Pylori Foundation The Helicobacter Foundation Web site is dedicated to providing the latest information on helicobacter pylori, its diagnosis, treatment and the diseases associated with it. Amongst the information currently provided are details of diseases related to helicobacter pylori, information on its pathogenesis and epidemiology, FAQS and discussion boards. Aimed at professionals and the public.

75. Helicobacter Pylori Noninvasive Testing helicobacter pylori Noninvasive Testing H. pylori IgG. helicobacter pylori Antibody or Antigen testing IgG testing may be positive for years after eradication http://www.fpnotebook.com/GI138.htm

Home About Links Index ... Editor's Choice document.write(code); Advertisement Gastroenterology Laboratory Cirrhosis ... Helicobacter pylori Invasive Testing Helicobacter pylori Noninvasive Testing Helicobacter pylori Stool Antigen Urea Breath Test Stomach Gastrin Level Assorted Pages ACE Level Alpha-fetoprotein 24 hour Urine 5-hydroxyindoleacetic acid Liver Function Test ... Parasite Examination of the Stool Helicobacter pylori Noninvasive Testing H. pylori IgG H. pylori ELISA H. pylori Serology Book Home Page Cardiovascular Medicine Dentistry Dermatology Emergency Medicine Endocrinology Gastroenterology General Medicine Geriatric Medicine Gynecology Hematology and Oncology HIV Infectious Disease Jokes Laboratory Neonatology Nephrology Neurology Obstetrics Ophthalmology Orthopedics Otolaryngology Pediatrics Pharmacology Prevention Psychiatry Pulmonology Radiology Rheumatology Sports Medicine Surgery Urology Chapter Gastroenterology Index Bowel Cirrhosis Constipation Dermatology Diarrhea Esophagus Examination Gynecology Hematology and Oncology Hepatitis Inflammatory Bowel Disease Infectious Disease Laboratory General Malabsorption Neurology Neonatology Obstetrics Pancreas Pediatrics Pharmacology Prevention Procedure Psychiatry Peptic Ulcer Disease Radiology Rectum Rheumatology Spleen Stomach Surgery Symptom Evaluation Page Laboratory Index ACE level AFP Cirrhosis Ammonia Serum Cirrhosis Antibody Anti-Mitochondrial Cirrhosis Antibody Smooth Muscle Hemeonc CEA Hemonc 5-HT Hepatitis Viral Hepatitis Viral Type A Serology Hepatitis Viral Type B Serology

76. HELICOBACTER PYLORI helicobacter pylori. What is helicobacter pylori? helicobacter pylori (H. pylori) is a spiral shaped bacterium that lives in or on the lining of the stomach. http://www.idph.state.il.us/public/hb/hbhylori.htm

HELICOBACTER PYLORI What is Helicobacter pylori Helicobacter pylori H. pylori ) is a spiral shaped bacterium that lives in or on the lining of the stomach. It causes more than 90 percent of ulcers, which are sores in the lining of the stomach or the duodenum (the first part of the small intestine). Before 1982, when this bacterium was discovered, spicy food, acid, stress and lifestyle were considered the major causes of ulcers. Since it is now known that most ulcers are caused by an infection with H. pylori , they can be cured with appropriate antibiotics. How common is H. pylori About two-thirds of the world's population is infected with H. pylori . In the United States, H. pylori is found more often in older adults, African Americans, Hispanics and lower socioeconomic groups. What illness can H. pylori cause? Most persons who are infected with H. pylori never have any symptoms or problems related to this infection; however, H. pylori can cause gastritis (inflammation of the lining of the stomach) or ulcers of the stomach or duodenum. About 25 million Americans suffer from ulcers. What are the symptoms of ulcers?

77. MWG Biotech - Catalog Arrays - Microorganisms - MWG Helicobacter Pylori Array MWG E. coli K12 Array MWG E.coli O157 MWG H. pylori Array THE MWG Yeast Array MWG S. pneumoniae Array MWG C. jejuni Array MWG helicobacter pylori Array. http://www.mwg-biotech.com/html/d_arrays/d_catalog_heli_pylori.shtml

Home Diagnosis Catalog Arrays MWG Microorganisms MWG E. coli K12 Array MWG ... Array MWG Helicobacter pylori Array Helicobacter pylori is a member of the gastric Helicobacter species causing chronic active, chronic persistent, and atrophic gastritis in adults and children. H. pylori infection can also cause duodenal and gastric ulcers. Infected persons have a 2- to 6-fold increased risk of developing gastric cancer. Approximately two-third of the world population is infected with this bacterium. The MWG H. pylori Array contains 1877 oligonucleotide probes covering the genomes of the two H. pylori strains J99 and 26695. 1307 oligonucleotides are matching with genes of both strains. 292 oligonucleotides are specific for H. pylori 26695 and 278 oligonucleotides are specific for H. pylori J99. Expression profiling with the complete MWG H. pylori Array can help to identify target genes for medical research purposes that are involved in chronic infection, inflammation, and malignant diseases like cancer.

78. Adult Health Advisor 2003.2: Helicobacter Pylori helicobacter pylori. What is helicobacter pylori? helicobacter pylori (H. pylori) is a type of bacteria that can cause stomach irritation http://www.med.umich.edu/1libr/aha/aha_hepylori_crs.htm

Adult Health Topics All Health Topics Find a UMHS Doctor T his information is not a tool for self-diagnosis or a substitute for medical treatment. You should speak to your physician or make an appointment to be seen if you have questions or concerns about this information or your medical condition. Search Adult Topics Search All Topics T his information is not a tool for self-diagnosis or a substitute for medical treatment. You should speak to your physician or make an appointment to be seen if you have questions or concerns about this information or your medical condition. Index Spanish version Illustration Helicobacter Pylori What is Helicobacter pylori? Helicobacter pylori (H. pylori) is a type of bacteria that can cause stomach irritation (gastritis) and ulcers. H. pylori may also be a factor in the development of stomach cancer. How does it occur? H. pylori is a common infection. By middle age 50% of adults have been infected with it. It tends to spread among people who are living together, sharing food and bathrooms. Doctors are trying to learn why some but not most people infected with H. pylori have gastritis and ulcers. Stomach-irritating habits such as smoking and drinking alcohol may contribute to these problems.

79. Helicobacter Pylori helicobacter pylori gastritis and ulcers in Children A 12 year old child is evaluated for epigastric abdominal pain interfering http://home.coqui.net/myrna/heli.htm

Helicobacter pylori: gastritis and ulcers in Children A 12 year old child is evaluated for epigastric abdominal pain interfering with activities and causing nighttime wakening. There has been occasional vomiting containing “coffee ground” material. An UGI series is negative. The patient is treated with antacids and an H2-receptor blocker with relief of symptoms. However, several months later, the epigastric pain and vomiting recur. Endoscopy reveals an antral gastric mucosa with thickened, nodular folds. Gastric biopsies are significant for chronic gastritis, and special stains reveal a thin layer of bacteria within the mucosal coat. Is there a relationship between the bacteria and the gastritis? If so, what is the appropriate therapy? Recent studies associating the presence of Helicobacter pylori (Hp) with gastritis, and ulcers in pediatric patients have advanced our knowledge of this condition and changed our concept of diagnosis and therapy. The turning point was the linking of bacteria and gastric disease, with the description of urease activity in the stomach, and documentation of the enzyme in the gastric mucosa of many species including man. When Hp was eventually isolated, its ability to produce large amounts of urease provided not only an explanation for the origin of urease, but also a diagnostic test for the organism in vivo and in vitro. Hp is a gram-negative, microaerophilic, motile organism approximately 0.5 µm wide and 3 to 5 µm long. In vivo, it is generally S-shaped, though it may take many forms, from U-shaped to rodlike. Its surface is smooth, and has 4 to 7 polar flagella that distinguish it from Campylobacter. Hp grows slowly on blood- or serum-supplemented media, taking 3 to 7 days for typical 1 mm translucent colonies to appear. Hp produces large amounts of urease, that may help protect it from gastric acid; it also produces other significant enzymes including a mucinase, lipase, catalase, hemolysin, and cytopathic toxin.

80. Helicobacter Pylori - Wikipedia, The Free Encyclopedia helicobacter pylori. From Wikipedia, the free encyclopedia. helicobacter pylori is a bacterium that infects the mucus lining of the human stomach. http://en.wikipedia.org/wiki/Helicobacter_pylori

Helicobacter pylori From Wikipedia, the free encyclopedia. Helicobacter pylori is a bacterium that infects the mucus lining of the human stomach . It belongs among the proteobacteria . Many peptic ulcers and some types of gastritis are caused by H. pylori infection, although most humans are infected and many infections do not lead to any symptoms. Treatment of these diseases now often includes antibiotics . Long term infection with the bacterium is associated with gastric cancer , and H. pylori has been categorized as a group I carcinogen by the International Agency for Research on Cancer (IARC). About 2/3 of the world population are infected by the bacterium. Under poor sanitory conditions, one commonly finds infected children; in the U.S. , older people (about 50% of those over the age of 60, 20% of those under the age of 40) and poor people are more likely to be infected. The infection apparently persists for life; the immune system cannot fend off the organism. The bacteria have been isolated from feces saliva and dental plaque of infected patients, which suggests possible transmission routes. One can test for

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