Soltan Dallal Mm, Rahimi Forushani A, Bakhtiari R,
Volume 6, Issue 1 (4-2012)
Abstract
Abstract Background and objectives: Helicobacter pylori is a helical gram negative bacterium with polar flagella, discovered by Warren and Marshall in 1983. Helicobacter pylori exist in the stomach mucus tissue of less than 20% of people under 30 years old, but this amount would increase up to 40% and 60% in 60- year- old people. The aim of this study was to compare three methods of culture media, direct slide staining and the urease test for the rapid diagnosis of bacterium in case of peptic or duodenal ulcer. Material and Methods: In This descriptive study, duplicate biopsy specimens were taken from 82 clients referring to four different Hospitals .In endoscopy room of the Hospitals, a rapid urease test were carried out on one of duplicate specimens for the presence or non-presence of Helicobacter pylori. In order to see the Helicobacter pylori in the tissues, three slides using foushin, giemsa, and gram staining were prepared from the second specimens. Then, the specimens were incubated into selective culture media and incubated for 4-6 days in micoraerophilic condition. Results: Of 82 tested specimens 70(85.5%) and 66(80.5%) are identified as Helicobacter pylori by positive urease and culture medium, respectively. The frequency of foushin, giemsa, and gram staining are 67 (81.7%), 66 (80.5%), and 61 (74.4%), respectively. The foushin staining is the best with 100% sensitivity among the other methods. Conclusion: Based on difference between proportions, There is no significant difference between staining methods (foshin, giemsa, gram staining) and culture media in all cases. Key words: Helicobacter pylori, microscopic methods, urease test, culture media, identification
Seyedeyn Khorasani, M, Yousefi Mashouf, R, Majlesi, A, Jaefari, M, Alikhani, My,
Volume 9, Issue 1 (4-2015)
Abstract
Abstract
Background and Objective: Helicobacter pylori (H. Pylori) infection is related to chronic gastritis, peptic ulcer, duodenal ulcer and gastric cancer. Thus, identification and treatment of the infection have a considerable importance. The aim of this study was to compare three methods of Histopathology, Culture and Rapid Urease test (RUT) in identification of H. Pylori in gastric biopsy specimens.
Material and Methods: The participants were 153 patients (64 women and 89 men) suffering from digestive complaints, who referred to the endoscopy department of Shahid Beheshi Hospital in Hamadan, Iran. Three gastric biopsy samples were collected from each patient and examined by standard RUT, Histopathology and culture methods for diagnosis of H. Pylori.
Results: Out of 153 patients, 69.9%, 27.4% and 2.6 % had gastritis, gastric ulcer and gastric cancer, respectively. The rate of infection with Urease test, culture and histology were identified 49.7%, 54.2%, and 89.5%, respectively. The sensitivity and specificity of the RUT result at first hour and after the first up to 24 hours were 55.4% and 80%, and 55.4% and 66/7%, respectively. The sensitivity and specificity of culture method were 60.6% and 100%, respectively.
Conclusion: Based on the results, Histopathology method has a more sensitivity than both Culture method and rapid urease test for diagnosis of H. Pylori, and RUT is more specific when done in the first hour rather than after the first hour.
Key words: Helicobacter pylori, rapid urease test methods, RUT, Histopathology
