OBJECTIVE: To determine the presence of @entity1534 and, if detected, its potential prevalence in causing recurrent @entity7809 confined to mucosa-associated lymphoid tissues of the pharynx. DESIGN: Prospective, controlled clinical trial. SETTING: Otolaryngology Department of Tanta University Hospitals, Tanta, Egypt. @entity1 : A total of 146 @entity1 with recurrent @entity9645 and pharynx and 20 normal control subjects. INTERVENTIONS: @entity1 were assigned to group 1 (n = 58), in which the @entity1066 were strictly limited to the lymphoid tissues, or group 2 (n = 88), in which the @entity1066 were randomly distributed in the oral cavity and pharynx. @entity1534 DNA was extracted from 3-mm-diameter tissue samples, and polymerase chain reaction amplifications were performed for the 16S ribosomal RNA gene. MAIN OUTCOME MEASURE: Positivity for @entity1534 . RESULTS: In group 1, 39 @entity1 (67%) were positive for @entity1534 DNA, while in group 2, 9 @entity1 (10%) were positive (chi(2) test, P<.001). It was not detected in any of the 20 control samples. CONCLUSION: Our results support a possible causative role for @entity1534 in recurrent @entity7809 with a characteristic distribution and affinity to mucosa-associated lymphoid tissues of the pharynx.

Prevalence of @entity1534 DNA in recurrent XXXX in mucosa-associated lymphoid tissues of the pharynx.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'PATIENTS'] @entity9645 :: ('MESH:D019226', 'Disease') :: ['multiple aphthous ulcers of the oral cavity'] @entity7809 :: ('MESH:D013281', 'Disease') :: ['aphthous ulcers', 'aphthous ulcerations'] @entity1066 :: ('MESH:D014456', 'Disease') :: ['ulcers'] @entity1534 :: ('210', 'Species') :: ['H pylori', 'Helicobacter pylori']
@entity7809 :: (MESH:D013281,Disease) :: ['aphthous ulcerations']
