Evaluation of a commercial ELISA kit for the serological diagnosis of Helicobacter pylori infection.
H. pylori infection can be diagnosed serologically. We evaluated an ELISA kit (Helicobacter pylori IgG, DIESSE) prepared using a glycine extract of an autoctonous H. pylori strain which produced the highest biologically active urease titre out of five strains tested. The kit was tested with serum samples from H. pylori-infected and uninfected adults and children. The Western Blot technique was used as reference method for the H. pylori infective status. Based on the results obtained by immunoblotting with serum samples from H. pylori negative subjects, two different cut-off values were considered for adults and children. Sensitivity and specificity were respectively 95% and 100% for adults, 95.6% and 97.8% for children. In conclusion, the clinical accuracy of this commercially available ELISA kit proved to be very good; the adoption of two different cut-off values for adults and children also improved its parameters of reliability.
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Istituto di Patologia Speciale Medica, Università di Siena, Italy.
Oderda
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Verdiani
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D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000907:Antibodies, Bacterial / Q000097:blood*; D015153:Blotting, Western; D002648:Child; D002675:Child, Preschool; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D016481:Helicobacter Infections / Q000097:blood / Q000175:diagnosis*; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D008875:Middle Aged; D011237:Predictive Value of Tests; D011933:Reagent Kits, Diagnostic; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013045:Species Specificity
D000907:Antibodies, Bacterial; D011933:Reagent Kits, Diagnostic