title: Evaluation of a commercial latex test for serological diagnosis of Helicobacter pylori infection in treated and untreated patients.
abstract: The value of a commercially available latex test (Pyloriset) for the diagnosis of Helicobacter pylori infection by demonstration of specific antibodies was compared with that of direct diagnostic methods such as culture, biopsy-urease test and microscopy of fuchsin-stained smears. The sera were from 136 patients who prior to this study either had or had not been treated for Helicobacter pylori-infection simultaneously with amoxicillin (3 x 750 mg/day) and metronidazole (3 x 500 mg/day) for 12 days. On average, the sensitivity of the test was 90%. The specificity with sera from untreated patients was 75.9%; with sera from treated patients specificity was 22.2%, 28% and 20% 1, 3 and 6 months respectively after start of treatment. Only as late as one year after the onset of chemotherapy did the specificity return to 67%. Because of its low specificity this test does not offer any advantage over other tests in the detection of Helicobacter pylori-infection or in monitoring the chemotherapeutic success.
authors.affiliation: Department of Clinical Microbiology, Vienna University, Austria.
authors.forename: A M
authors.initials: AM
authors.lastname: Hirschl
authors.forename: M M
authors.initials: MM
authors.lastname: Hirschl
authors.forename: J
authors.initials: J
authors.lastname: Berger
authors.forename: M L
authors.initials: ML
authors.lastname: Rotter
mesh_terms: D000658:Amoxicillin / Q000627:therapeutic use; D000907:Antibodies, Bacterial / Q000097:blood*; D004359:Drug Therapy, Combination; D005069:Evaluation Studies as Topic; D016481:Helicobacter Infections / Q000175:diagnosis* / Q000188:drug therapy; D016480:Helicobacter pylori / Q000276:immunology* / Q000302:isolation & purification; D006801:Humans; D007841:Latex Fixation Tests; D008795:Metronidazole / Q000627:therapeutic use; D012680:Sensitivity and Specificity; D014510:Urease / Q000032:analysis
chemical_list: D000907:Antibodies, Bacterial; D008795:Metronidazole; D000658:Amoxicillin; D014510:Urease