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Journal Cover American Journal of Infectious Diseases and Microbiology
  [22 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2328-4056 - ISSN (Online) 2328-4064
   Published by Science and Education Publishing Homepage  [72 journals]
  • Diagnostic Performance of Polymerase Chain Reaction Targeting Insertion
           Sequence (IS6110) for the Detection of Extra Pulmonary Tuberculosis

    • Authors: A. Chitra; B. Usharani, S. Smita, C. K. Vidya Raj, S. Anbazhagi, M. Muthuraj
      Pages: 126 - 131
      Abstract: Background: The diagnostic challenges in extra-pulmonary tuberculosis remain to be addressed even though remarkable progress has been made in the diagnostics of pulmonary tuberculosis during the last decade. Methods: This study was conducted to evaluate the use of polymerase chain reaction (PCR) in diagnosis of definitive extra pulmonary tuberculosis patients, and to assess the performance of insertion sequence (IS)6110 based PCR assay as compared to conventional liquid culture by Microbial growth Indicator Tube (MGIT) 960 system. Results: A total of 792 clinical specimens were collected from clinically suspected extra pulmonary tuberculosis patients. The specimens included 22 ascitic fluids, 69 pleural fluids, 240 Cerebrospinal fluids (CSF), 386 endometrial tissues, 47 lymph nodes, 22 pus, one synovial fluid, one fallopian tube, two brain abscess and two ovarian cyst samples. All these clinical samples were subjected to Auromine O staining (FM) for acid fast bacilli (AFB) and culture on MGIT 960 tubes containing Modified Middlebrooks 7H9 broth medium. PCR was performed by targeting 123bp fragment of insertion sequence IS6110 of Mycobacterium tuberculosis. Our study of 792 specimens, revealed their 87.5% sensitivity to endometrial samples, 92.31% sensitivity for cerebrospinal fluid, and 66.66% sensitivity in Pleural fluid and 60% sensitivity in Lymph node samples. The combined sensitivity and specificity of the PCR IS6110 was calculated to be 85.71% and 82.91%, respectively. Conclusion: PCR using IS6110 primer was able to pick up more positivity in extra pulmonary samples as compared to conventional culture method for the detection of M. tuberculosis.
      PubDate: 2017-8-10
      DOI: 10.12691/ajidm-5-4-1
      Issue No: Vol. 5, No. 4 (2017)
  • Staphylococcus pseudintermedius Isolated from Two Dog Cases with
           Ophthalmic Lesions

    • Authors: Maha I. Hamed; Terri L. McCalla, Wendy M. Townsend, Mohamed N. Seleem
      Pages: 132 - 136
      Abstract: Two dog cases with history of recurrent bacterial conjunctivitis were submitted to Purdue University for bacterial culture and sensitivity testing. The bacterial cultures were also tested for their ability to form a biofilm. Biofilm forming Staphylococcus pseudintermedius was isolated from the two cases and identified by Vitek2 and PCR analysis. The bacterial antibiotic sensitivity testing revealed that Isolate one was susceptible to ticarcillin, ceftiofur, cefazolin, moxifloxacin, amikacin and rifampicin with MICs ranging 0.03125-4 μg/ml. Isolate two was susceptible to ceftiofur, gatifloxacin, cefazolin, moxifloxacin, tetracycline, doxycycline and rifampicin with MICs ranging
      PubDate: 2017-11-2
      Issue No: Vol. 5, No. 4 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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