Introduction: In India, to increase human immunodeficiency virus (HIV) case detection, the National Technical Working Group on TB /HIV had made it mandatory to screen for HIV infection among presumptive tuberculosis (TB) cases. Material and methods: Our study was a cross-sectional study, conducted between June 2015 and December 2016 in a tertiary care institute (JIPMER), in South India, to estimate the prevalence of HIV among presumptive TB cases. Results: Among the 964 presumptive TB cases who attended pulmonary medicine OPD, 189 patients were sputum acid-fast bacilli (AFB) positive. Among the 189 sputum positive cases, 9 were HIV positive. Of the 964 presumptive TB cases, 879 gave consent for HIV testing and 33 (3.7%) turned out to be HIV positive. If only sputum positive cases had been screened for HIV, we would have missed 24 new HIV positive cases. The number needed to screen was 27 among presumptive TB cases and 18 among TB patients. Conclusions: The uptake of HIV testing (91%) and the diagnostic yield of 3.7% of HIV positive cases among the presumptive TB patients is quite high compared to that of the Revised National Tuberculosis Control Programme (RNTCP) mechanism of Puducherry. This reinforces the need to screen all the presumptive cases for HIV infection, to increase HIV case detection so that anti-retroviral therapy (ART) can be initiated early.
Wstęp: W celu zwiększenia wykrywalności zakażenia wirusem HIV w Indiach narodowa grupa robocza ds. zakażenia wirusem HIV i gruźlicy wprowadziła obowiązek badań przesiewowych w kierunku zakażenia wirusem HIV u wszystkich chorych z podejrzeniem gruźlicy. Materiał i metody: Badanie miało charakter przesiewowy i miało na celu ocenę występowania zakażenia wirusem HIV wśród chorych z podejrzeniem gruźlicy. Przeprowadzono je w okresie od czerwca 2015 do grudnia 2016 roku w trzeciorzędowym ośrodku referencyjnym JIPMER w południowych Indiach. Wyniki: Spośród 964 chorych z podejrzeniem gruźlicy przyjętych w poradni pulmonologicznej, u 189 chorych stwierdzono dodatni wynik plwociny w kierunku prątków kwasoodpornych (AFB). Spośród 189 chorych z dodatnim wynikiem plwociny u 9 stwierdzono zakażenie wirusem HIV. Spośród 879 chorych, którzy wyrazili zgodę na badanie w kierunku zakażenia wirusem HIV, u 33 wynik był dodatni (3.7%). Gdyby zbadano jedynie chorych z dodatnim wynikiem plwociny, nie wykryto by 24 nowych przypadków zakażenia wirusem HIV. Liczba badań, które należałoby wykonać, aby wykryć jeden przypadek zakażenia wirusem HIV (number needed to screen), wynosi 27 dla chorych z podejrzeniem gruźlicy i 18 dla chorych z potwierdzoną gruźlicą. Wnioski: Wykrywalność zakażenia HIV (91%) i skuteczność diagnostyczna 3.7% w grupie chorych z domniemaną gruźlicą jest wysoka w porównaniu z danymi zaktualizowanego programu narodowego kontroli gruźlicy. W związku z tym w celu zwiększenia wykrywalności zakażenia wirusem HIV konieczne jest objęcie badaniami przesiewowymi również chorych z podejrzeniem gruźlicy, aby można było wcześnie wdrożyć leczenie anty-retrowirusowe.
BackgroundPatient compliance with the two-day Revised National Tuberculosis Control Programme’s (RNTCP) diagnostic process for pulmonary tuberculosis (TB) is poor in high case load settings, with a high dropout rate observed on the second day. Hence, the World Health Organization (WHO) has recommended the same-day (spot-spot) sputum test for high-burden TB countries to help reduce diagnostic dropouts. This study addresses the paucity of comparative data on the accuracy and agreement of the two methods, while the WHO recommendations are yet to be implemented by the RNTCP. The objective of this study was to assess and compare the smear positivity rates of the same-day and conventional sputum examination methods for the diagnosis of sputum smear-positive pulmonary TB.MethodologyWe conducted a cross-sectional, analytical, nonrandomized comparative study on presumptive TB patients attending a designated microscopy center in a tertiary care hospital. Three sputum samples were collected: a first spot, a second spot (one hour after the first spot), and an early morning sample taken on the following day. The first and the second spot samples taken one hour apart were included for microscopic analysis. The conventional (i.e., two-day sputum) method used the first spot and the early morning sputum sample taken on the following day. A positive result from any one of the three sputum samples was recorded as a proven TB case. We then compared the results of the smear microscopy obtained by the two methods.ResultsThe same-day sputum microscopic method diagnosed 181 out of a total 189 TB cases. The conventional method diagnosed 188 cases. Thus, same-day sputum microscopy missed eight cases, whereas the conventional method missed only one case. The sputum positivity rate was 18.8% in the same-day sputum microscopy samples and 19.5% in the conventional method samples. The incremental yield of the second sputum sample in the same-day (second spot) sample was five cases (2.7%). In the conventional method (early morning sample), the yield was 12 cases (6.3%). The sensitivity of the same-day microscopy and conventional methods were 95.76% and 99.5%, respectively.ConclusionThe conventional method of diagnosing sputum-positive pulmonary TB had more sensitivity compared to the same-day sputum microscopy approach.
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