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Clinical And Laboratorical Evaluation Of Immunochromotographic Assay Based On 34Kda Antigen Of Mycoberium Tuberculosis In Detection Of Pulmonary And Extra Pulmonary TB

التقييم المخبري السريري لطريقة الاستشراب المناعي ICT المعتمدة على المستضد ٣٨ كيلو دالتون للمتفطرة الدرنية في تشخيص حالات التدرن الرئوي و خارج الرئوي

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 Publication date 2000
  fields Medicine
and research's language is العربية
 Created by Shamra Editor




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To evaluate the rapid immuno-chromotographic assay ICT based on antigen 38 Kda of Mycobacterium tuberculosis, sera was collected from 245 persons, 111 of them were pulmonary TB patients, 69 extrapulmonary, 25 having non TP respiratory diseases, and 30 healthy control persons. The diagnosis were based on usual testes such as signs and symptoms, X-ray, smear and biopsy as well as the using of the serological test ICT the results were as follows: When pulmonary TB smear positive ICT was positive in 50 of 55 patients (sensitivity 91%) whereas in pulmonary TB smear negative, sensitivity of ICT was 86 % (48/ 56). The sensitivity of the assay in extra-pulmonary TB patients was 74% (51/69) and the sensitivity of the test in all TB types was 83% (149/ 180) and specificity of the test in nonTB pulmonary diseases were 96% and 100%in healthy persons.


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Research summary
تقدم هذه الدراسة تقييماً لطريقة الاستشراب المناعي السريع (ICT) المعتمدة على مستضد 38 كيلو دالتون من المتفطرة السلية في تشخيص حالات التدرن الرئوي وخارج الرئوي. تم جمع عينات مصل من 245 شخصاً، منهم 111 مريضاً بالتدرن الرئوي، و69 مريضاً بالتدرن خارج الرئوي، و25 شخصاً يعانون من أمراض تنفسية غير تدرنية، و30 شخصاً أصحاء. تم تشخيص الحالات باستخدام الاختبارات التقليدية مثل الأعراض والأشعة السينية واللطاخة والخزعة، بالإضافة إلى اختبار ICT. أظهرت النتائج أن حساسية اختبار ICT كانت 91% في حالات التدرن الرئوي الإيجابية لللطاخة، و86% في حالات التدرن الرئوي السلبية لللطاخة. أما في حالات التدرن خارج الرئوي، فكانت الحساسية 74%. بلغت حساسية الاختبار في جميع أنواع التدرن 83%، وكانت نوعيته 96% في الأمراض التنفسية غير التدرنية و100% في الأشخاص الأصحاء.
Critical review
دراسة نقدية: تقدم هذه الدراسة فهماً جيداً لكفاءة اختبار الاستشراب المناعي السريع (ICT) في تشخيص التدرن الرئوي وخارج الرئوي. ومع ذلك، يمكن توجيه بعض الانتقادات البناءة. أولاً، قد يكون حجم العينة صغيراً نسبياً، مما قد يؤثر على تعميم النتائج. ثانياً، لم يتم توضيح تفاصيل حول توزيع الأعمار والجنس للمشاركين، مما قد يؤثر على دقة النتائج. ثالثاً، الدراسة تعتمد بشكل كبير على الاختبارات التقليدية كمعيار ذهبي، والتي قد تكون غير دقيقة في بعض الحالات. وأخيراً، لم يتم مناقشة التكلفة والوقت اللازمين لإجراء اختبار ICT مقارنة بالاختبارات التقليدية، مما قد يكون مهماً في البيئات ذات الموارد المحدودة.
Questions related to the research
  1. ما هي حساسية اختبار الاستشراب المناعي السريع (ICT) في حالات التدرن الرئوي الإيجابية لللطاخة؟

    حساسية اختبار الاستشراب المناعي السريع (ICT) في حالات التدرن الرئوي الإيجابية لللطاخة كانت 91%.

  2. ما هي نوعية اختبار ICT في الأشخاص الأصحاء؟

    نوعية اختبار ICT في الأشخاص الأصحاء كانت 100%.

  3. كم عدد الأشخاص الذين تم جمع عينات مصل منهم في الدراسة؟

    تم جمع عينات مصل من 245 شخصاً في الدراسة.

  4. ما هي حساسية اختبار ICT في حالات التدرن خارج الرئوي؟

    حساسية اختبار ICT في حالات التدرن خارج الرئوي كانت 74%.


References used
Beige J, Lokies J, Schaberg T et al. Clinical evaluation of a Mycobacterium tuberculosis PCR assay. J Clin Microbiol 1995;33:90- 95
Bothamley G H, Rudd R, Festenstein F et al. Clinical value of the measurement of Mycobacterium tuberculosis specific antibody in pulmonary tuberculosis Thorax 1992;47:270-275
Bothamley GH. Serological diagnosis of tuberculosis. Eur Respir J Suppl 1995 Sep;20:676s-688s
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