scholarly journals A COMPARATIVE STUDY ON THE ACCURACY OF LIGHT EMITTING DIODE FLUORESCENT MICROSCOPY AND CONVENTIONAL SPUTUM SMEAR MICROSCOPY IN THE DIAGNOSIS OF PATIENTS WITH PULMONARY TUBERCULOSIS

2018 ◽  
Vol 5 (9) ◽  
pp. 736-740
Author(s):  
Kishore Kumar K ◽  
◽  
Sai Samrat K ◽  
Sony Reddy S ◽  
◽  
...  
Keyword(s):  
Pulmonary Tuberculosis ◽  
Comparative Study ◽  
Light Emitting Diode ◽  
Fluorescent Microscopy ◽  
Sputum Smear ◽  
Smear Microscopy ◽  
Sputum Smear Microscopy ◽  
Light Emitting

scholarly journals Diagnosis of pulmonary tuberculosis with cartridge based nucleic acid amplification test and light emitting diode fluorescent microscopy: a comparative study

2019 ◽  
Vol 6 (5) ◽  
pp. 1580 ◽  
Author(s):  
Pratik Kumar ◽  
Puneet Bhardwaj
Keyword(s):  
Nucleic Acid ◽  
Pulmonary Tuberculosis ◽  
Negative Predictive Value ◽  
Predictive Value ◽  
Light Emitting Diode ◽  
Fluorescent Microscopy ◽  
Nucleic Acid Amplification Test ◽  
Nucleic Acid Amplification ◽  
Smear Microscopy ◽  
Light Emitting

Background: Due to low sensitivity and inability to detect drug resistance, smear microscopy limits its impact on TB control. Culture methods and drug susceptibility testing is complex, time consuming, and takes around 6-8 weeks. A new diagnostic test, cartridge based nucleic acid amplification test (CBNAAT) was developed based on real-time polymerase chain reaction (RT PCR). Objective of this study to compare the results of CBNAAT for diagnosis of pulmonary tuberculosis with LED fluorescent microscopy and sputum culture.Methods: A cross-sectional study was conducted in the department of Chest and TB, CIMS, Bilaspur. Each Sputum sample of presumptive TB patients were tested with CBNAAT, sputum smear  microscopy by light emitting diode (LED) fluorescent microscopy (FM) and solid and liquid culture for diagnosis of Tuberculosis. Results of CBNAAT, Fluorescent Microscopy and Culture for detection of Mycobacterium Tuberculosis were compared.Results: The sensitivity and specificity for CBNAAT were 97% and 100% respectively; while that for Fluorescent microscopy were 70% and 100% respectively. The positive and negative predictive value for CBNAAT was 100% and 96% respectively. The positive and negative predictive value for Fluorescent microscopy was 100% and 73% respectively.Conclusion: CBNAAT is having high sensitivity and specificity for diagnosis of pulmonary tuberculosis. It should be routinely used under national health programme to detect a tuberculosis case efficiently.

scholarly journals Usefulness of Light Emitting Diode (LED) fluorescent microscopy as a tool for rapid and effective method for the diagnosis of pulmonary tuberculosis

1970 ◽  
Vol 37 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Z Khatun ◽  
M Kamal ◽  
CK Roy ◽  
T Sultana ◽  
MQ Rahman ◽  
...  
Keyword(s):  
Fluorescence Microscopy ◽  
Pulmonary Tuberculosis ◽  
Light Emitting Diode ◽  
Fluorescent Microscopy ◽  
Infectious Agent ◽  
Sputum Smear ◽  
Light Emitting ◽  
Brightfield Microscopy ◽  
The Difference ◽  
A Prospective Study

Background: Tuberculosis remains world's leading cause of death from a single infectious agent. Fluorescence microscopy offers well-described benefits, comparing with brightfield microscopy, for the evaluation sputum smear samples for tuberculosis. We evaluated the diagnostic performance of fluorescence microscopy, using novel Light Emitting Diode (LED) technology as an alternative to the conventional fluorescence microscopy by Auramine stain as well as brightfield microscopy by Ziehl- Neelsen (ZN) stain.Objectives: The objective of the study was to see the usefulness of LED fluorescent microscopy in the diagnosis of pulmonary tuberculosis.Methods: This is a prospective study consisted of 150 sputum samples from the patients of NIDCH, Mohakhali. All samples were stained by auramine and ZN stain at BSMMU and culture was done in Lowenstein-Jensen (L-J) media as gold standard at NTRL, Mohakhali.Results: In this study total 66(44%) out of 150 sputum specimens were positive for Mycobacterium Tuberculosis by culture. Sensitivity and specificity documented for the different modalities were 95.38% and 94.11%, respectively, for the LED assessment; 68.18% and 90.47%, respectively, for the CFM assessment; and 56.06% and 97.61%, respectively, for brightfield microscopy by ZN stain. The difference in their case detection rate was statistically significant (χ2=119.38, p<0.001).Conclusion: Fluorescence Microscopy (FM) is more sensitive than ZN for diagnosis of pulmonary tuberculosis. However, since FM is more sensitive and rapid, using this method (LED) in clinical laboratories with large specimen numbers is recommended. DOI: http://dx.doi.org/10.3329/bmrcb.v37i1.7792 Bangladesh Med Res Counc Bull 2011; 37: 7 -10

scholarly journals Clinical impact and cost analysis of the use of either the Xpert MTB Rif test or sputum smear microscopy in the diagnosis of pulmonary tuberculosis in Rio de Janeiro, Brazil

2018 ◽  
Vol 51 (5) ◽  
pp. 631-637
Author(s):  
Anália Zuleika de Castro ◽  
Adriana Rezende Moreira ◽  
Jaqueline Oliveira ◽  
Paulo Albuquerque Costa ◽  
Carolyne Lalucha Alves Lima Da Graça ◽  
...  
Keyword(s):  
Pulmonary Tuberculosis ◽  
Cost Analysis ◽  
Rio De Janeiro ◽  
Clinical Impact ◽  
Sputum Smear ◽  
Smear Microscopy ◽  
Sputum Smear Microscopy

scholarly journals Association between Xpert MTB/RIF cycle threshold values and sputum smear microscopy in patients with pulmonary tuberculosis

2021 ◽  
pp. e20200549
Author(s):  
Gabriela Carpin Pagano1 ◽  
Giovana Rodrigues Pereira1,2 ◽  
Karen Gomes D'Ávila3 ◽  
Luciana Rott Monaiar3 ◽  
Denise Rossato Silva1,3,4
Keyword(s):  
Pulmonary Tuberculosis ◽  
Sputum Smear ◽  
Smear Microscopy ◽  
Threshold Values ◽  
Sputum Smear Microscopy ◽  
Cycle Threshold

scholarly journals Optimising fluorescein diacetate sputum smear microscopy for assessing patients with pulmonary tuberculosis

PLoS ONE ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. e0214131 ◽  
Author(s):  
Sumona Datta ◽  
Keren Alvarado ◽  
Robert H. Gilman ◽  
Teresa Valencia ◽  
Christian Aparicio ◽  
...  
Keyword(s):  
Pulmonary Tuberculosis ◽  
Fluorescein Diacetate ◽  
Sputum Smear ◽  
Smear Microscopy ◽  
Sputum Smear Microscopy

scholarly journals Sputum Smear Positive Pulmonary Tuberculosis Diagnostic Dropout Rate in Public Health Facilities, Addis Ababa, Ethiopia

2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Daniel Melese Desalegn ◽  
Kumera Terfa Kitila ◽  
Boja Dufera Taddese ◽  
Tinsae Kidanemariam Hailu ◽  
Tariku Takle Dinku ◽  
...  
Keyword(s):  
Public Health ◽  
Pulmonary Tuberculosis ◽  
Addis Ababa ◽  
Dropout Rate ◽  
Sputum Smear ◽  
P Value ◽  
Smear Microscopy ◽  
Sputum Smear Microscopy ◽  
Public Health Facilities ◽  
Smear Positive Pulmonary Tuberculosis

Background. Prolonged laboratory diagnostic process of tuberculosis can lead to failure to complete the diagnosis and increase dropout rate of smear positive pulmonary tuberculosis (PTB) cases. This implies such dropout patients without completing diagnosis are critical as infected individuals remain untreated in the community, providing more opportunities for transmission of the disease and adversely affecting the epidemic. The aim of this research is to determine the level of smear positive PTB diagnosis dropout rate of spot-morning-spot sputum microscopy diagnosis method in public health facilities, in Addis Ababa, Ethiopia. Methods. Retrospective review of patient documents in 13 public health facilities’ TB laboratory in Addis Ababa was conducted from October 2011 to March 2016. Data was computerized using Epi-info software and analysed using SPSS version 20.0 software. Descriptive numerical summaries were used to present the findings. Association between the dropout rate and demographic variables was assessed by Chi-square (X2). Bivariate model using Odds Ratio (OR) with a 95% Confidence Interval (CI) was calculated. P-Value less than 0.05 was taken as statistically significant. Results. Of 41,884 presumptive TB patients registered during the 53 months for laboratory investigation, 5.9% were positive for the first spot sputum smear microscopy. Among these positive cases, 142 (5.8%) and 298 (12.1%) did not come back to the laboratory to submitted early morning and second spot sputum specimens, respectively. The diagnostic dropout for morning sputum specimen in hospitals was 5.6% (58/1039) and in health centres was 5.9% (84/1424). However, higher proportion of dropout for second spot sputum specimen in hospitals was 16.4% (170/1039), compared to the health centres, 8.9% (128/1424). Diagnostic dropout of sputum smear microscopy had no significant association with sociodemographic variable (P value >0.05), while it had significant association with facility type (P value <0.05). Conclusion. In this study smear positive pulmonary tuberculosis diagnostic dropout rate was high compared to WHO reported for the new strategy shift implying the importance of shifting to same-day approach. Hence, shifting from conventional to same day is crucial to minimize the TB diagnostic dropout rate in the study area and other similar settings. Further research is needed/recommended in the local setting to compare the yield and dropout rates between same-day and conventional sputum smear microscopy approach.

scholarly journals Light Emitting Diode (LED) Fluorescent Microscopy: a Milestone in the Detection of Paucibacillary Mycobacterium in Case of Pulmonary Tuberculosis

1970 ◽  
Vol 40 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Z Khatun ◽  
MS Hossain ◽  
CK Roy ◽  
T Sultana ◽  
MQ Rahman ◽  
...  
Keyword(s):  
Pulmonary Tuberculosis ◽  
Hiv Risk ◽  
Gold Standard ◽  
Risk Evaluation ◽  
Financial Constraints ◽  
Light Emitting Diode ◽  
Fluorescent Microscopy ◽  
Light Emitting ◽  
Fluorescent Microscope ◽  
Lowenstein Jensen

In Bangladesh with a large number of pulmonary tuberculosis cases and financial constraints with high HIV risk, evaluation of scanty i.e paucibacillary cases has great importance. To study the efficacy of Light Emitting Diode fluorescent microscopy in the diagnosis of pulmonary tuberculosis specially paucibacillary cases in comparison to conventional fluorescent microscopy, Ziehl-Neelsen staining and culture of sputum samples from patients suspected of pulmonary tuberculosis. 150 sputum samples collected from the patients suspected of pulmonary tuberculosis were processed by the Petroff's method, and subjected to Ziehl-Neelsen staining (ZN), which were examined by both LED and conventional fluorescent microscope (CFM) and culture on Lowenstein- Jensen media (gold standard) for detection of Mycobacterium tuberculosis. In this study, out of 150 patients 14.67%, 8.67%, 4% cases were detected as paucibacillary (Scanty) cases by LED, CFM, ZN respectively. LED fluorescent microscopy is more effective in the detection of paucibacillary cases of pulmonary tuberculosis than other methods of microscopic examination. DOI: http://dx.doi.org/10.3329/bmj.v40i1.9958 BMJ 2011; 40(1): 22-26

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