Authors: Pamphile Aguessy, Durand Dah-Nouvlessounon, Selma Gomez, Bernix B. Soglongbe, Victorien Dougnon, Haziz Sina, Adolphe Adjanohoun, Lamine Baba-Moussa.
Background: Group A beta-hemolytic streptococcus (ABHS) tonsillitis is an acute disease that is often benign but sometimes serious due to its locoregional and general complications. It is a frequent cause of consultation among general practitioners, ENT and paediatrics. The choice and interest of our work was motivated by the fact that one of the most important acute upper respiratory infections is tonsillitis with the risk of serious complications. This study aims to determine the sensitivity and specificity of RDOT in the diagnosis of ABHA tonsillitis in southern Benin.
Methods: This was a prospective analytical and descriptive study carried out at the Vallée de Grâce Medical Clinic (CM VG) and at the Padre Pio Humanitarian Health Center (CSVH), at the Laboratory of Biology and Molecular Typing in Microbiology / UAC, in Benin over 12 months (July 2, 2022 and June 31, 2023). It included patients diagnosed with tonsillitis. All the patients included underwent a RDOT and a cytobacteriological examination of the throat swab (Gold Standard). We studied the following variables: age, sex, months, clinical signs, cytobacteriological examination of the throat swab and TROD results.
Results: We recorded 272 tonsillitis cases. 60 cases of group A beta-hemolytic streptococcal (ABHS) tonsillitis are confirmed by bacterial culture. Group A beta-hemolytic streptococcal tonsillitis accounted for 22.06% of tonsillitis. 133 men (49%) and 139 women (51%) were registered. 32 men (53.33%) and 28 women (46.67%) had SBHA tonsillitis. The highest frequency of isolation of group A streptococcus was observed in the age group [0 to 5[years with 27 cases out of 60, i.e. a proportion of 45%. SBHA tonsillitis are more frequent in the months of December and August with the respective proportions of 16.67% and 10%. The SBHA TROD performed showed a Sensitivity of 95%, a Specificity of 94%, a positive predictive value of 92% and a negative predictive value of 98%.
Conclusion: Streptococcal etiology represents 22.06% of tonsillitis in Benin. Our results reinforce the interest of RDOT and especially cytobacteriological examination in the etiological diagnosis of tonsillitis.
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