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Evaluation of invasive and non-invasive methods for the diagnosis of Helicobacter pylori infection in symptomatic children and adolescents
Ogata, Silvio Kazuo; Kawakami, Elisabete; Patrício, Francy Reis Silva; Pedroso, Margareth Zabeu; Santos, Antonio Mario.
  • Ogata, Silvio Kazuo; Universidade Federal de São Paulo. Escola Paulista de Medicina. Pediatric Department. São Paulo. BR
  • Kawakami, Elisabete; Universidade Federal de São Paulo. Escola Paulista de Medicina. Pediatric Department. Discipline of Pediatric Gastroenterology. São Paulo. BR
  • Patrício, Francy Reis Silva; Universidade Federal de São Paulo. Escola Paulista de Medicina. Department of Pathological Anatomy. São Paulo. BR
  • Pedroso, Margareth Zabeu; Universidade Federal de São Paulo. Escola Paulista de Medicina. Department of Pathological Anatomy. São Paulo. BR
  • Santos, Antonio Mario; Clínica Helico. Lisbon. PT
São Paulo med. j ; 119(2): 67-71, Mar. 2001. tab
Article in English | LILACS | ID: lil-282392
RESUMO
CONTEXT Multiple diagnostic methods are available for the detection of Helicobacter pylori infection, but at present no single one can be used as the gold standard.

OBJECTIVE:

The aim of this study was to evaluate the diagnostic accuracy of 3 invasive and 2 non-invasive methods for detection of Helicobacter pylori infection in symptomatic children and adolescents.

DESIGN:

Prospective cohort study

SETTING:

Peptic Disease outpatients service, Discipline of Pediatric Gastroenterology, Universidade Federal de São Paulo / Escola Paulista de Medicina. PATIENTS Forty-seven patients who underwent endoscopy because of dyspeptic symptoms. DIAGNOSTIC

METHODS:

Endoscopy with gastric biopsies for 3 invasive (rapid urease test, histology and culture) and 2 non-invasive methods (a commercial ELISA serology and 13carbon urea breath test - isotope ratio mass spectrometry) for detection of Helicobacter pylori infection. MAIN MEASUREMENTS Sensitivity, specificity, positive and negative predictive values of each method and agreement and disagreement rates between the methods.

RESULTS:

Forty-seven patients [mean age, 11y9mo (SD 2y10mo), 27 female and 20 male]; 62 percent of them were Helicobacter pylori-positive. All methods agreed in 61 percent, and were negative in 21 percent and positive in 40 percent. The greatest concordance between 2 methods occurred between the invasive

methods:

histology and rapid urease test (89.6 percent) and histology and culture (87.5 percent). The greatest sensitivity, considering Helicobacter pylori-positive cases, for any combination of 3 or more tests, was achieved by the rapid urease test (S=100 percent), followed by histology, serology and 13carbon-urea breath test (S=93.1 percent) and lastly by culture (S=79.3 percent). The highest specificity was obtained by histology (100 percent) and culture (100 percent), followed by the rapid urease test (84.2 percent), serology (78.9 percent) and 13carbon-urea breath test (78.9 percent).

CONCLUSIONS:

Our results suggest that among invasive methods, an association between the rapid urease test and histology constituted the best choice for the detection of Helicobacter pylori infection. If results of histology and the rapid urease test are different, serology may be recommended
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Urease / Endoscopy, Gastrointestinal / Helicobacter pylori / Helicobacter Infections Type of study: Diagnostic study / Etiology study / Incidence study / Observational study / Prognostic study / Risk factors Limits: Adolescent / Adult / Child / Child, preschool / Female / Humans / Male Language: English Journal: São Paulo med. j Journal subject: Cirurgia Geral / Ciˆncia / Ginecologia / Medicine / Medicina Interna / Obstetr¡cia / Pediatria / Sa£de Mental / Sa£de P£blica Year: 2001 Type: Article Affiliation country: Brazil / Portugal Institution/Affiliation country: Clínica Helico/PT / Universidade Federal de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Urease / Endoscopy, Gastrointestinal / Helicobacter pylori / Helicobacter Infections Type of study: Diagnostic study / Etiology study / Incidence study / Observational study / Prognostic study / Risk factors Limits: Adolescent / Adult / Child / Child, preschool / Female / Humans / Male Language: English Journal: São Paulo med. j Journal subject: Cirurgia Geral / Ciˆncia / Ginecologia / Medicine / Medicina Interna / Obstetr¡cia / Pediatria / Sa£de Mental / Sa£de P£blica Year: 2001 Type: Article Affiliation country: Brazil / Portugal Institution/Affiliation country: Clínica Helico/PT / Universidade Federal de São Paulo/BR