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Sharif N, Ahmed D, Mahmood RT, Qasim Z, Khan SN, Jabbar A, Khattak AA, Asad MJ, Ahmed W, Khan MM, Awan UA, Zaman N, Habiba U, Noureen S, Alghamdi HA. Comparison of different diagnostic modalities for isolation of Mycobacterium Tuberculosis among suspected tuberculous lymphadenitis patients. BRAZ J BIOL 2021; 83:e244311. [PMID: 34431905 DOI: 10.1590/1519-6984.244311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 01/18/2021] [Indexed: 01/17/2023] Open
Abstract
Tuberculosis is a communicable disease with high morbidity and mortality rates in developing countries. The study's primary objective is to compare conventional methods such as acid-fast bacillus (AFB) culture and microscopy with rapid diagnostic methods. The secondary objective is to compare histopathological and microbiological findings in suspected patients with tubercular lymphadenitis. A total of 111 samples (August 2018 to September 2019) of lymph nodes were processed for AFB microscopy, AFB cultures, drug-susceptibility testing (DST), histopathology, and Xpert Mycobacterium Tuberculosis (MTB)/resistance to Rifampin (RIF) assays. Out of 111 lymph node samples, 6 (5.4%) were positive for AFB smear microscopy, 84 (75.6%) were positive for AFB culture, 80 (70.7%) were positive on Gene Xpert, and 102 (91.8%) were indicative of tuberculosis for histopathology studies. Mycobacteria growth indicator tube (MGIT) culture positivity was 84 (75.6%) higher than solid Lowenstein-Jensen (LJ) culture 74 (66.6%). Positive cultures underwent phenotypic DST. Two cases were Multidrug-resistant (MDR) on DST, while three cases were Rifampicin resistant on Gene Xpert. The sensitivity of Genexpert was (62%) against the conventional AFB culture method. The poor performance of conventional lymphadenitis diagnostic methods requires early and accurate diagnostic methodology. Xpert MTB/RIF test can help in the treatment of multidrug-resistant TB cases. Nonetheless, rapid and conventional methods should be used for complete isolation of Mycobacterium tuberculosis.
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Affiliation(s)
- N Sharif
- The University of Haripur, Department of Medical Laboratory Technology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - D Ahmed
- The University of Haripur, Department of Medical Laboratory Technology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - R T Mahmood
- Mirpur University of Science and Technology - MUST, Department of Biotechnology, Mirpur (AJK), Pakistan
| | - Z Qasim
- Divisional Headquaters Teaching Hospital, Department of Pathology, Mirpur AJ&K, Pakistan
| | - S N Khan
- The University of Haripur, Department of Medical Laboratory Technology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - A Jabbar
- The University of Haripur, Department of Medical Laboratory Technology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - A A Khattak
- The University of Haripur, Department of Medical Laboratory Technology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - M J Asad
- University Institute of Biochemistry and Biotechnology, PMAS-Arid Agriculture University Rawalpindi, Rawalpindi, Punjab, Pakistan
| | - W Ahmed
- The University of Haripur, Department of Microbiology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - M M Khan
- The University of Haripur, Department of Microbiology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - U A Awan
- The University of Haripur, Department of Medical Laboratory Technology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - N Zaman
- University of Swat, Centre for Biotechnology and Microbiology, KPK, Pakistan
| | - U Habiba
- The University of Haripur, Department of Forestry and Wildlife Management, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - S Noureen
- The University of Haripur, Department of Forestry and Wildlife Management, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - H A Alghamdi
- King Khalid University, College of Sciences, Department of Biology, Abha, Saudi Arabia
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