The Yield of First Spot Double Slide Smears for the Diagnosis of Pulmonary Tuberculosis
International Journal of Immunology
Volume 3, Issue 5, October 2015, Pages: 52-56
Received: Jul. 1, 2015;
Accepted: Jul. 11, 2015;
Published: Oct. 16, 2015
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Basha Ayele Dersie, Department of Biomedical Science, College of Health Science and Medicine, Dilla University, Dilla, Southern Ethiopia
Background: Direct sputum smear microscopy is the cornerstone for the diagnosis of pulmonary tuberculosis (PTB) in resource-poor countries. However, the requirement for repeated visits to submit specimens and receive results is associated with considerable diagnostic delay, work load, patients drop-out and high expenses for patients. Although the World Health Organization (WHO) has recently changed its policy from spot morning spot (SMS) to spot morning (SM), the SM method still involves two days visits for a patient. Objective: This study evaluated the yield of first spot double slides smears for the diagnosis of PTB in high TB setting. Methods: A total of 362 patients who visited the out-patient department (OPD) of Dilla referral hospital and who were suspected of PTB were involved in the study. In addition SMS sputum samples were collected; double slides smears were prepared, stained by the Ziehl–Neelsen (ZN) method and 100 fields were examined under oil immersion objective for acid fast bacilli (AFB). Results: Of 362, 54(14.92%) were smear-positives. Out of the 54 smear positive subjects, 53 (98.15%) were positives by the first spot specimen. Additionally, 1 of 54 (1.85%) were positives by the morning specimen. Using the 2-day protocol (SMS) among 362 patients, 54(14.92%) were smear positives by double slides and 53(14.64%) by single slide smears. Whereas using the 1-day protocol (first spot); among 362 patients, 53(14.64%) were smear positives both in double slides and single slide smears. Conclusion: The double slides smears from the first spot sputum samples appeared to be as effective as SMS strategy for the diagnosis of PTB though additional studies are required under various settings.
Basha Ayele Dersie,
The Yield of First Spot Double Slide Smears for the Diagnosis of Pulmonary Tuberculosis, International Journal of Immunology.
Vol. 3, No. 5,
2015, pp. 52-56.
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