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Screening of Serum Anti-Helicobacter pylori Antibodies in Patients with Peptic Complaints Using Indirect Immunofluorescence Assay

التحري عن أضداد الملتوية البوابية لدى مرضى الشكايات الهضمية بطريقة التألق المناعي غير المباشر

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 Publication date 2013
and research's language is العربية
 Created by Shamra Editor




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The study aims to determine the Seroprevalence of anti-H. pylori antibodies in patients with peptic complaints using indirect immunofluorescence assay (IFA), and compare serology with histological examination of biopsies from upper gastrointestinal endoscopy to evaluate the sensitivity and specificity of this assay. The Study sample included 120 participants divided into two groups: 69 patients with peptic complaints who underwent upper GI endoscopy in Al-Assad Hospital in Lattakia (average age 47 years old), and 51 volunteers without peptic complaints (average age 33 years old). The study was conducted in the period between February 2011 and March 2012. Indirect immunofluorescence assay (IFA) was used to study the seroprevalence of anti-H. pylori antibodies and fluorescence intensity in the two groups. The results showed that 63 of the patients group (91.3%) and 39 of volunteers (76.47%) are anti-H. pylori antibodies positive. The comparison of serology with histological examination of biopsies showed a sensitivity and specificity of 78% and 80% respectively in the presence of moderate and strong degree of fluorescence. The results reveal the importance of IFA as a non-invasive screening test besides the endoscopy, and the utility of this technique for the epidemiologic studies in a local setting.


Artificial intelligence review:
Research summary
تهدف هذه الدراسة إلى تحديد معدل إيجابية أضداد الملتوية البوابية في المصل لدى مرضى الشكايات الهضمية باستخدام تقنية التألق المناعي غير المباشر (IFA) ومقارنة النتائج المصلية مع نتائج الفحص النسيجي للخزعات المأخوذة بالتنظير الهضمي العلوي. شملت الدراسة 120 مشاركاً، منهم 69 مريضاً يعانون من شكايات هضمية و51 متطوعاً لا يعانون من أي أعراض هضمية. أظهرت النتائج أن 91.3% من المرضى و76.47% من المتطوعين كانوا إيجابيي الأضداد. تبين أن حساسية ونوعية تقنية التألق المناعي غير المباشر هي 78% و80% على التوالي عند وجود درجة تألق متوسطة أو شديدة. تشير النتائج إلى أهمية استخدام هذه التقنية كاختبار غير باضع لتحري الخمج بالملتوية البوابية وإمكانية استخدامها في الدراسات الوبائية المحلية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة في تسليط الضوء على تقنية التألق المناعي غير المباشر كوسيلة غير باضعة لتشخيص الخمج بالملتوية البوابية. ومع ذلك، يمكن توجيه بعض الانتقادات البنّاءة. أولاً، حجم العينة قد يكون غير كافٍ لتعميم النتائج على نطاق أوسع. ثانياً، لم يتم التطرق بشكل كافٍ إلى العوامل المحتملة التي قد تؤثر على دقة النتائج مثل تناول الأدوية أو وجود أمراض أخرى. أخيراً، كان من الممكن إجراء مقارنة مع تقنيات أخرى غير باضعة مثل اختبار تنفس اليوريا لتحسين موثوقية النتائج.
Questions related to the research
  1. ما هي التقنية المستخدمة في هذه الدراسة لتحري أضداد الملتوية البوابية؟

    تم استخدام تقنية التألق المناعي غير المباشر (IFA) لتحري أضداد الملتوية البوابية.

  2. ما هي نسبة إيجابية الأضداد لدى المرضى الذين يعانون من شكايات هضمية؟

    بلغت نسبة إيجابية الأضداد لدى المرضى الذين يعانون من شكايات هضمية 91.3%.

  3. ما هي حساسية ونوعية تقنية التألق المناعي غير المباشر وفقاً للدراسة؟

    حساسية تقنية التألق المناعي غير المباشر هي 78% ونوعيتها 80% عند وجود درجة تألق متوسطة أو شديدة.

  4. ما هي أهمية استخدام تقنية التألق المناعي غير المباشر في التشخيص؟

    تعتبر تقنية التألق المناعي غير المباشر مهمة كاختبار غير باضع لتحري الخمج بالملتوية البوابية ويمكن استخدامها في الدراسات الوبائية المحلية.


References used
Mobley, HL. The role of Helicobacter pylori urease in the pathogenesis of gastritis and peptic ulceration. Aliment Pharmacol Ther 1996; 10 Suppl 1:57–64
Marshall, BJ, Warren, JR. Unidentified curved bacilli in the stomach of patients with gastritis and peptic ulceration. Lancet 1984; 1:1311
Amieva MR, El-Omar EM. Host-bacterial interactions in Helicobacter pylori infection. Gastroenterology 2008; 134:306
Kenneth EL, McColl M.D. Helicobacter pylori infection. N Engl J Med 2010; 362:1597-1604
IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. IARC monographs on the evaluation of carcinogenic risks to humans. Vol. 61. Schistosomes, liver flukes and Helicobacter pylori. Lyon, France: International Agency for Research on Cancer, 1994:177-240
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