title: Touch cytology. A reliable and cost-effective method for diagnosis of Helicobacter pylori infection.
abstract: A variety of reliable methods are available for detecting Helicobacter pylori (Hp) during upper gastrointestinal endoscopy. We evaluated the clinical utility and cost-effectiveness of rapid urease test (RUT), touch cytology (TC), and histology (H). Two hundred thirty-eight consecutive patients (178 without previous medical treatment and 60 formerly treated with anti-Hp therapy) were tested for Hp infection by RUT, TC, and H (H&E stain). The infection status for each patient was established by a concordance of two test results. The time to carry out the three tests and their cost were also calculated. Sensitivity of TC (100%) was significantly higher than that of RUT (86.8%; P < 0.001), but not than that of H (94.9%). RUT was significantly more specific than H (100% vs 95.6%; P < 0.05), but not than TC (96.4%). Hp infection was more frequent in the patients with chronic active gastritis than in those with chronic nonactive gastritis (P < 0.001). No Hp infection was detected in absence of chronic antral inflammation. RUT resulted the cheapest method and H the most expensive; TC is faster and cheaper than H. When additional information about the severity of mucosal damage or the presence of cell atypias is not necessary, histologic examination can be omitted, and a cost-effective strategy for assessing Hp status might consist in taking two antral biopsies, the former for performing RUT and the latter for preparing a slide by TC, which should be stained and examined only when the RUT result is negative.
authors.affiliation: Department of Internal Medicine, S. Anna Hospital, Ferrara, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Trevisani
authors.forename: S
authors.initials: S
authors.lastname: Sartori
authors.forename: M
authors.initials: M
authors.lastname: Ruina
authors.forename: M
authors.initials: M
authors.lastname: Caselli
authors.forename: V
authors.initials: V
authors.lastname: Abbasciano
authors.forename: E
authors.initials: E
authors.lastname: Grandi
authors.forename: E
authors.initials: E
authors.lastname: Forini
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003362:Cost-Benefit Analysis; D016099:Endoscopy, Gastrointestinal; D005260:Female; D005753:Gastric Mucosa / Q000382:microbiology / Q000473:pathology*; D016481:Helicobacter Infections / Q000473:pathology*; D016480:Helicobacter pylori / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008875:Middle Aged; D011706:Pyloric Antrum / Q000382:microbiology / Q000473:pathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014510:Urease
chemical_list: D014510:Urease