<?xml version='1.0' encoding='UTF-8'?><xml><records><record><source-app name="HighWire" version="7.x">Drupal-HighWire</source-app><ref-type name="Journal Article">17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Wang, Daniel</style></author><author><style face="normal" font="default" size="100%">Chiu, Timothy</style></author><author><style face="normal" font="default" size="100%">Chiu, Kwok-Wai</style></author></authors><secondary-authors></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Clinical Implication of Immunoglobulin G levels in the Management of Patients with &lt;span class=&quot;named-content genus-species&quot; id=&quot;named-content-1&quot;&gt;Helicobacter pylori&lt;/span&gt; Infection</style></title><secondary-title><style face="normal" font="default" size="100%">The Journal of the American Board of Family
                Medicine</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014-09-01 00:00:00</style></date></pub-dates></dates><pages><style  face="normal" font="default" size="100%">682-689</style></pages><doi><style  face="normal" font="default" size="100%">10.3122/jabfm.2014.05.130181</style></doi><volume><style face="normal" font="default" size="100%">27</style></volume><issue><style face="normal" font="default" size="100%">5</style></issue><abstract><style  face="normal" font="default" size="100%">Objective: The objective of this research was to gauge the diagnostic utility of serology tests compared with urea breaths tests (UBTs) and determine reliable threshold values/ranges for diagnosis of Helicobacter pylori infection using only immunoglobulin (Ig) G results. Methods: Data were obtained from 371 patients with UBTs and/or serology tests. Quantitative results were converted to multiple of minimum positive value (MMPV). Results were paralleled to obtain percentage change in serum IgG levels and 95% confidence intervals were obtained to establish new ranges for diagnosis. Results: Treated patients with only serology tests in a time frame of 3 to 6 months after final treatment displayed a 68.33% ± 2.95% decrease in 95% confidence interval of serum IgG. Uninfected patients with serology and UBT results within 2 weeks displayed a range of 1.32 ± 0.23 MMPV; infected patients produced a range of 3.32 ± 0.88 MMPV. Conclusion: Treated patients should display a 65.38% to 71.28% decrease in serum IgG levels, along with an ending IgG level of ≤1.75 U/mL or ≤4.025 EV (ELISA value). Before treatment or exposure, patients with serum IgG values of 1.09 to 1.55 U/mL or 2.507 to 3.565 EV or lower are generally uninfected. Because of the lower cost and high confidence of results, we believe that IgG testing should be considered as a reasonable and even perhaps preferred method of monitoring H. pylori infections.</style></abstract></record></records></xml>