title: [Prevalence and risk faactors of Helicobacter pylori infection in three populations of children in Puebla, Mexico].
abstract: BACKGROUND
  The infection by Helicobacter pylori affects approximately 50% of the world population, in average, nevertheless the geographical area and the socioeconomic conditions are determining for the infection in earlier ages, not even that, only 20% of these patients will develop gastroduodenal disease. The infection is distributed universally, concerning more to the countries in routes of development, where he appears with major frequency in the infantile and young population. In Mexico the seroprevalence studies founded that 20% of the children of one year old already had developed antibodies Ig G against Helicobacter pylori and 50% of them are positive 10 years after The major prevalence is reached between 25 and 30 years of age. In our community we do not know the prevalence of active infection.
  
  
  METHODS
  The study group became from three different communities: Group A. Formed with children from half-low socioeconomic level, which they come habitually to a school placed in the conurban zone of the city of Puebla, Mexico and that inhabit a marginal area of asistential services of sanitary attention. Group B. Formed with children from the rural zone, of socioeconomic rural way, which habitually they come to a school placed in the surroundings of the City of Puebla, Mexico and that live in a rural zone, with regular services of sanitary attention. Group C. Formed with children from high socioeconomic level, which they come habitually to a private school placed in the city of It Populates, Mexico and that inhabit in zones with all the sanitary services.
  
  
  RESULTS
  The group A was formed by 94 children, 23 of them was positive to Hp antigen (24.46%) and negatives 71 (75.54%). The group B was formed by 94 children, 17 of them was positive to Hp antigen (18.08%) and negatives 77 (81.92%). The group C was formed by 94 children, two of them was positive to Hp antigen (2.12%) and 92 negatives (97.88%). Statistically significant differences was found in: The days that eat meat, the drainage in the domicile, in the prevalence of antigen, if they have breakfast every day, the number of persons who live in the room, if there is drinkable water in the domicile, if they have drainage in the domicile, if they present diarrheic stools, if they possess wild animals. And no relation with the age, the kind (genre), the existence of domestic animals and the presence of abdominal pain.
  
  
  CONCLUSIONS
  It is a question of three different populations in the same territory, the first one located in a conurban zone of regular services of health demonstrates a prevalence of almost 25%. The second from a rural zone, who live and study out of the circle of the city and in this one found 18% of positive results and the third group living in the city but with all the sanitary services that reported 2%. Only the drainage presence intra domiciliary and the fact that they were eating meat a week demonstrated to have statistic importance in three groups. To have drinkable water and the number of persons who coexist in the house demonstrated the sanitary conditions that also prevailed statistically in the group A and B in relation to the control group; The presence of diarrheic stools in the group A statistically significant make us suspect that one hand the sanitary environmental conditions to that these children are submitted are not the bestones.
authors.affiliation: Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, México.
authors.forename: Roberto
authors.initials: R
authors.lastname: Calva-Rodríguez
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Luna-Alcántara
authors.forename: Bernardette
authors.initials: B
authors.lastname: Lagunes-Yannelli
authors.forename: María Eugenia
authors.initials: ME
authors.lastname: Rivera-Domínguez
authors.forename: Daniel
authors.initials: D
authors.lastname: Calva-Cerqueira
authors.forename: Edgar
authors.initials: E
authors.lastname: Santos-Marcial
mesh_terms: D000328:Adult; D002648:Child; D005260:Female; D016481:Helicobacter Infections / Q000453:epidemiology* / Q000276:immunology; D016480:Helicobacter pylori; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis / Q000276:immunology; D008297:Male; D008800:Mexico / Q000453:epidemiology; D012307:Risk Factors; D012424:Rural Population; D012499:Sanitation; D012959:Socioeconomic Factors; D014505:Urban Population
chemical_list: D007074:Immunoglobulin G