scholarly journals USE OF CARTRIDGE BASED NUCLEIC ACID AMPLIFICATION TEST FOR RAPID DETECTION OF MYCOBACTERIUM TUBERCULOSIS IN PULMONARY AND EXTRAPULMONARY TUBERCULOSIS

2021 ◽  
pp. 29-33
Author(s):  
RASHMI M. KARIGOUDAR ◽  
MAHESH H. KARIGOUDAR ◽  
SANJAY M. WAVARE ◽  
LAKSHMI KAKHANDKI ◽  
SMITHA BAGALI
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Nucleic Acid ◽  
Sensitivity And Specificity ◽  
Extrapulmonary Tuberculosis ◽  
Nucleic Acid Amplification Test ◽  
Nucleic Acid Amplification ◽  
Rifampicin Resistance ◽  
P Value ◽  
Presumptive Diagnosis ◽  
College Hospital

Objective: Tuberculosis is an airborne infection caused by Mycobacterium tuberculosis. Timely diagnosis and treatment are important to prevent the spread of infection. Cartridge-based nucleic acid amplification test (CBNAAT) provides a valuable tool in the early detection of TB. This study is undertaken to evaluate the utility of CBNAAT for the detection of MTB. Comparison of cartridge-based nucleic acid amplification testing with ZN staining. Methods: This prospective observational study was carried out in the Department of Microbiology, BLDEDU’s Shri B. M. Patil Medical College, Hospital and RC and Dr. Karigoudar Diagnostic Laboratory, Vijayapur. A total of 129 samples from patients with the presumptive diagnosis of TB based on history, clinical presentation, and radiological findings were included in the study. All samples were subjected to ZN staining, and Cartridge-based nucleic acid amplification test and data were analyzed. Results: The present study showed ZN smear positivity of 7.75% and CBNAAT positivity of 19.38%. CBNAAT sensitivity and specificity were 90% and 86.55, respectively, compared with ZN staining with a significant P value of <0.001. Conclusion: CBNAAT helps diagnose TB and detect rifampicin resistance within 2-3 h with high sensitivity and specificity. Rifampicin resistance detection is of great concern, which otherwise leads to treatment failure and on time spread of multidrug resistance TB, leading to increased morbidity and mortality.

scholarly journals Utility of cartridge based nucleic acid amplification test in the diagnosis of extra pulmonary tuberculosis

2019 ◽  
Vol 6 (6) ◽  
pp. 1801
Author(s):  
Mahesh Chand Bairwa ◽  
Mahendra Kumar Banera ◽  
Chandan Mal Fatehpuria
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Nucleic Acid ◽  
Pulmonary Tuberculosis ◽  
Pleural Fluid ◽  
Nucleic Acid Amplification Test ◽  
Nucleic Acid Amplification ◽  
World Health ◽  
Rifampicin Resistance ◽  
Extra Pulmonary Tuberculosis ◽  
Extra Pulmonary

Background: Tuberculosis is one of the top 10 cause of death globally. Extra-pulmonary tuberculosis is an important clinical problem. Extra-pulmonary tuberculosis range from 30%-53% in India. Diagnosis of extra-pulmonary tuberculosis is still challenging despite many investigations. World Health Organization recommends Gene-Xpert Mycobacterium Tuberculosis/Rifampicin (Cartridge Based Nucleic Acid Amplification Test-CBNAAT) over conventional tests for diagnosis of extra-pulmonary tuberculosis which permits rapid tuberculosis diagnosis through detection of the genetic sequence of DNA of mycobacterium tuberculosis and simultaneous identification of a majority of the mutations that confirm Rifampicin resistance which is highly predictive of multi-drug resistant tuberculosis.Methods: Study was carried out over a period of one year.  Patients with suggestive of extra-pulmonary tuberculosis were included in study. Diagnosis of extra-pulmonary tuberculosis carried out by clinical, radiological, biochemical analysis, cytological, bacteriological confirmation. Based on mycobacterium tuberculosis result, the study population were divided into ‘Mycobacterium Tuberculosis detected’ and ‘Mycobacterium Tuberculosis not detected’ groups. Mycobacterium Tuberculosis detected group was further divided into ‘Rifampicin resistant’ and ‘Rifampicin sensitive’.Results:  Total 220 patients were included. Among extra-pulmonary tuberculosis, there were 83.64% were pleural fluid. 65.91% patients where be <45 years of age. Mostly patients were from rural areas and illiterate. Diabetes Mellitus found as the most common co-morbidities. CB-NAAT was able to detect mycobacterium tuberculosis in 35% (77) extra-pulmonary samples, out of which 6 were rifampicin resistant. Out of 184 samples of pleural fluid, 53 were rifampicin sensitive and 4 were found rifampicin resistant.Conclusions: CB-NAAT has to be endorsed in every health care centres as the test gives rapid result and also detection of rifampicin resistance which is the major concern for every clinician.

scholarly journals A Retrospective Cross-Sectional Study of the Utility of Cartridge-Based Nucleic Acid Amplification Test in Diagnosis of Pulmonary and Extrapulmonary Tuberculosis in People Living with HIV in Second Highest HIV Prevalent State in India

2021 ◽  
Author(s):  
Tade Bagbi ◽  
Ningthoukhongjam Reema ◽  
S. Bhagyabati Devi ◽  
Thangjam Gautam Singh ◽  
Mohammad Jaleel ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Cross Sectional Study ◽  
Nucleic Acid Amplification Test ◽  
Nucleic Acid Amplification ◽  
Rifampicin Resistance ◽  
Sputum Smear ◽  
Smear Microscopy ◽  
Sectional Study ◽  
Cross Sectional ◽  
Smear Negative

Abstract Introduction Tuberculosis (TB) in people living with human immunodeficiency virus (PLHIV) is difficult to diagnose due to fewer organisms in sputum and extrapulmonary samples. Sputum culture takes 4 to 8 weeks for growth of the mycobacteria. Delayed treatment for TB in PLHIV leads to increased mortality. This study evaluated cartridge-based nucleic acid amplification test (CBNAAT) as a diagnostic tool for diagnosis of pulmonary TB (PTB) and extrapulmonary TB (EPTB) in PLHIV in the second most HIV prevalent state in India and for comparing its efficacy between Ziehl–Neelsen (ZN) staining sputum smear–positive and sputum smear–negative TB. Methods This cross-sectional study was conducted in RIMS, Imphal, with 167 PLHIV patients, age 15 years or older, having signs and symptoms of TB. Appropriate samples for sputum microscopy and CBNAAT were sent. Conclusion The overall sensitivity of sputum smear for acid-fast bacillus (AFB) was found to be 30.71% and that of CBNAAT was 38.57%. Sensitivity of CBNAAT for sputum smear–positive and sputum smear–negative TB was 100 and 11.3%, respectively. Sensitivity of ZN smear for AFB of EPTB sample was 48.1% and that of CBNAAT was 59.25%. In both PTB and EPTB, CBNAAT showed an increase in diagnosis of microbiologically confirmed PTB cases by 7.8 and 11.1%, respectively, over and above the cases diagnosed by ZN smear microscopy. Rifampicin resistance was detected in five patients. We conclude that CBNAAT is a rapid test with better sensitivity in diagnosis of PTB and EPTB in PLHIV, compared with ZN smear microscopy. It detects rifampicin resistance for multidrug-resistant TB and helps in early treatment intervention.

scholarly journals Prospective study to find out the role of gastric aspirate examination by Ziehl-Neelsen staining (ZN staining) and cartridge based nucleic acid amplification test (CB-NAAT) as a diagnostic method in childhood tuberculosis

2018 ◽  
Vol 5 (4) ◽  
pp. 1609
Author(s):  
Akansha Arora ◽  
Anil Jain ◽  
B. S. Karnawat ◽  
Rakesh Kumawat
Keyword(s):  
Nucleic Acid ◽  
Predictive Value ◽  
Nucleic Acid Amplification Test ◽  
Nucleic Acid Amplification ◽  
Mantoux Test ◽  
P Value ◽  
Specific Method ◽  
Gastric Aspirate ◽  
Tuberculosis In Children

Background: Tuberculosis in children has been relatively neglected mainly because clinical diagnosis has low specificity, radiological interpretation is subject to inter-observer variability and the tuberculin skin test is a marker of exposure, not disease. The recent introduction of Cartridge based nucleic acid amplification test has significantly transformed the diagnostics of tuberculosis in adults but its application for Paediatric Tuberculosis is under evaluation. Therefore, authors conducted a study on role of gastric aspirate examination by ZN stain and Cartridge based nucleic acid amplification test in the diagnosis of childhood Tuberculosis.Methods: Authors did a prospective hospital-based study from Nov 2016 to Nov 2017 consisting of 100 randomly selected patients suspected of tuberculosis who had their gastric aspirate tested for CBNAAT and ZN stain for acid fast bacilli (AFB) along with Mantoux test and other routine investigations. Chi square test was used.Results: Culture positive tuberculosis was found in 21 out of 100 children. The sensitivity, specificity, positive predictive value and negative predictive value for CBNAAT were 76.1%, 98.7%, 94.1% and 93.9% and for ZN stain were 47.6%, 98.7%, 90.9% and 87.6% respectively. Positive history of contact (p value 0.0217), reactive Mantoux test (p value < 0.001) and low socioeconomic status were independently associated with a positive CBNAAT result.Conclusions: Analysis of gastric aspirate samples with CBNAAT is a sensitive and specific method for rapid diagnosis of pulmonary tuberculosis in children who cannot produce sputum. Compared with microscopy, CBNAAT offers better sensitivity and its scale up will improve access to tuberculosis diagnostics in children.

scholarly journals Study on cartridge based nucleic acid amplification test in children with Neurotuberculosis at RNT Medical College, Udaipur, Rajasthan, India

2019 ◽  
Vol 6 (4) ◽  
pp. 1588
Author(s):  
Shashi Bala ◽  
Suresh Goyal
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Nucleic Acid ◽  
Clinical Evaluation ◽  
Controlled Trial ◽  
Nucleic Acid Amplification Test ◽  
Nucleic Acid Amplification ◽  
Gastric Aspirate ◽  
Age Group ◽  
Major Health Problem ◽  
Medical College

Background: The aim was to determine utility of Cartridge based nucleic acid amplification test (CBNAAT) in diagnosis of mycobacterium tuberculosis in children with neurotuberculosis diagnosed on the basis of clinical evaluation, CSF findings and neuroimaging.Methods: A prospective randomized controlled trial was conducted in Pediatric Department of RNT Medical College, Udaipur, Rajasthan, India from July 2017 to June 2018. Total 110 children of age group of 6 months to 18 years with the diagnosis of tubercular meningoencephalitis (TBME) on the basis of clinical evaluation, CSF examination and neuroimaging were included in the study.Results: A total 110 children were enrolled. Maximum number of cases admitted with TBME were among 1-5 years of age group (60.91%). CSF and gastric aspirate were examined by CBNAAT for MTB. 5 (4.55%) children had CBNAAT positivity in CSF. Gastric aspirate was positive among 16 (14.55%) children. None of the patient had CBNAAT positive result both in CSF and gastric aspirate.Conclusions: TBME is a major health problem in children below 5 years. Gene Xpert assay has the potential to significantly improve and escalate the diagnosis of smear-negative body fluid specimens. CBNAAT for mycobacterium tuberculosis was positive in 5 (4.55%) children from CSF and 16 (14.55%) from gastric aspirate. Negative CBNAAT should not prevent any patient with suspected features of TBME from starting anti tubercular treatment (ATT) as sensitivity of this test remains low. Final judgement to start ATT should be based on clinical, biochemical and radiological profile especially in CNS tuberculosis.

scholarly journals Determination of Rifampicin Resistance Tuberculosis on Gene Xpert among Patients Attending Federal Medical Centre Yenagoa, Bayelsa State Niger Delta Region of Nigeria

2020 ◽  
pp. 156-163
Author(s):  
Oluwayemisi A. Olorode ◽  
Ofonime M. Ogba ◽  
Joshua J. Tarilade
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Niger Delta ◽  
Medical Centre ◽  
Nucleic Acid Amplification ◽  
World Health ◽  
Medical Laboratory ◽  
Rifampicin Resistance ◽  
P Value ◽  
Significant Difference ◽  
Age Range

Aim: Department of Medical Laboratory Science (Medical Microbiology Section), Niger Delta University. Tuberculosis, being an oldest known human disease, is a major cause of mortality. Does gender determine Rifampicin Resistance Mycobacterium tuberculosis among the patients with tuberculosis in Bayelsa State? This work was carried out between February, 2019 and September 2019 to determine the prevalence of Mycobacterium tuberculosis and its resistance to Rifampicin anti-mycobacterium therapy among patients attending Federal Medical Centre, Yenogoa, Bayelsa State. Methodology: A total of 250 sputum samples were collected from both HIV and non-HIV patients attending Federal Medical Centre, Mycobacteriology Laboratory (a referral laboratory in Bayelsa state); (age range 21-71 years) and immediately taken to the laboratory for analysis using GeneXpert machine, an automated cartridge based nucleic acid amplification diagnosis and traditional Ziehl-Neelsen test for the detection of Mycobacterium tuberculosis and Rifampicin resistance gene. Results: Findings showed that 50(100%) sputum samples (of which 24(48%) were from males and 26(52%) from females) out of the 250 samples examined were positive to Mycobacterium tuberculosis. Based on the GeneXpert analysis, the total of 8(16%); {4(8%) females and 4(8%) males}, samples were resistant to Rifampicin. Out of 50(100%) positive samples, the highest percentage prevalence of Mycobacterium tuberculosis was recorded within the age range of 21 and 30 years (52%); followed by 31-40 years (44%) and the least was 71 years (04%). The percentage prevalence of Rifampicin resistance Mycobacterium tuberculosis (RMB) was 16.0% while non-resistance was 84.0%; resistance was higher among the study subjects within the age range of between 21 and 30 years (6%) followed by 31-40 years (4%); 51-60 years (4.0%) and the least was 10-20 years and 70 years above(2%). There is no significant difference between the tuberculosis infected male and female resistance to rifampicin at P value= .88, t=14, df=4. However, out of 50 (100%) positive samples, 24 (48%) patients had HIV co-infection with tuberculosis while 26(52%) had tuberculosis only. There was no statistical significant difference between these two groups at P=.29, t=1.2 and df=4. Conclusion: There is a progressive increase in the frequency of Rifampicin resistant Mycobacterium tuberculosis (RrMTB) in this research compared to the percentage prevalence (4%) reported by World Health Organization (WHO) in 2018. There is therefore a need to establish more medical diagnostic laboratories for rapid detection of tuberculosis infection in all the eight (8) Local Government Areas of Bayelsa state.

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