Patent ID: 7179609

Claim:
A method for diagnosing possible presence of gastritis in a human by evaluating a blood sample, comprising the steps of: assaying the blood sample for the presence of antibodies specific for H,K-ATPase, assaying the blood sample for the presence of antibodies specific for Helicobacter pylori, assaying the blood sample for the concentration of pepsinogen I, and comparing the presence of H,K-ATPase antibodies, Helicobacter pylori antibodies, and pepsinogen I concentration to the respective values of H,K-ATPase antibodies, Helicobacter pylori antibodies, and pepsinogen concentration of a normal population, and further comprising the steps of multiplying the concentration of pepsinogen I by the concentration of Helicobacter pylori antibodies to get a number, and comparing the number to a number calculated similarly for the normal population, wherein concentrations of H,K-ATPase antibodies, Helicobacter pylori antibodies, and pepsinogen I in the sample and the number obtained by multiplying the concentration of pepsinogen I by the concentration of Helicobacter pylori antibodies that are different from respective corresponding values in a normal population are indicative of gastritis.