title: [Seroprevalence of Helicobacter pylori infection among children of different socioeconomic levels in Porto Velho, State of Rondônia].
abstract: This study investigated the seroprevalence of Helicobacter pylori infection in 200 children in the city of Porto Velho, State of Rondônia, divided in two groups of 100 children. The prevalence of seropositivity varied considerably according to socioeconomic level, such that 51% of the lower-level children and 24% of the middle-class children were positive. The characteristics of the child population relating to sex, ethnicity and diet did not represent risk factors for acquiring the infection. However, most of the infected children were in the age group of five years or older, independent of socioeconomic level. The phenotypic distribution of ABO blood groups among the infected and uninfected individuals showed that the seroreactivity to Helicobacter pylori was greater among the children with the O blood type, thus suggesting that these children have greater genetic susceptibility to infection by Helicobacter pylori.
authors.affiliation: Departamento de Medicina, Universidade Federal de Rondônia, Porto Velho, RO. valeria@valfarma.com.br
authors.forename: Rosely Valéria
authors.initials: RV
authors.lastname: Rodrigues
authors.forename: Teresa Cristina
authors.initials: TC
authors.lastname: Corvelo
authors.forename: Mabel Torres
authors.initials: MT
authors.lastname: Ferrer
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood; D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D016481:Helicobacter Infections / Q000175:diagnosis / Q000453:epidemiology*; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008297:Male; D015995:Prevalence; D016036:Seroepidemiologic Studies; D012959:Socioeconomic Factors
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G