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Prevalence of tuberculosis in Rwanda: Results of the first nationwide survey in 2012 yielded important lessons for TB control.

ABSTRACT: BACKGROUND:Rwanda conducted a national tuberculosis (TB) prevalence survey to determine the magnitude of TB in the country and determine to what extent the national surveillance system captures all TB cases. In addition we measured the patient diagnostic rate, comparing the measured TB burden data with the routine surveillance data to gain insight into how well key population groups are being detected. METHODS:A national representative nationwide cross-sectional survey was conducted in 73 clusters in 2012 whereby all enrolled participants (residents aged 15 years and above) were systematically screened for TB by symptoms and chest X-ray (CXR). Those with either clinical symptoms (cough of any duration) and/or CXR abnormalities suggestive of TB disease were requested to provide two sputum samples (one spot and one morning) for smear examination and solid culture. RESULTS:Of the 45,058 eligible participants, 43,779 were enrolled in the survey. Participation rate was high at 95.7% with 99.8% of participants undergoing both screening procedures and 99.0% of those eligible for sputum examination submitting at least one sputum sample. Forty cases of prevalent mycobacterium tuberculosis (MTB) and 16 mycobacteria other than tuberculosis (MOTT) cases were detected during the survey. Chest x-ray as screening tool had 3 and 5 times greater predictive odds for smear positive and bacteriological confirmed TB than symptom screening alone respectively. A TB prevalence of 74.1 (95% CI 48.3-99.3) per 100,000 adult population for smear positive TB and 119.3 (95% CI 78.8-159.9) per 100,000 adult population for bacteriological confirmed MTB was estimated for Rwanda. CONCLUSIONS:The survey findings indicated a lower TB prevalence than previously estimated by WHO providing key lessons for national TB control, calling for more sensitive screening and diagnostic tools and a focus on key populations. Use of chest x-ray as screening tool was introduced to improve the diagnostic yield of TB.

SUBMITTER: Migambi P

PROVIDER: S-EPMC7179849 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Prevalence of tuberculosis in Rwanda: Results of the first nationwide survey in 2012 yielded important lessons for TB control.

Migambi Patrick P Gasana Michel M Uwizeye Claude Bernard CB Kamanzi Eliane E Ndahindwa Vedaste V Kalisvaart Nico N Klinkenberg Eveline E

PloS one 20200423 4

<h4>Background</h4>Rwanda conducted a national tuberculosis (TB) prevalence survey to determine the magnitude of TB in the country and determine to what extent the national surveillance system captures all TB cases. In addition we measured the patient diagnostic rate, comparing the measured TB burden data with the routine surveillance data to gain insight into how well key population groups are being detected.<h4>Methods</h4>A national representative nationwide cross-sectional survey was conduct ...[more]

PMID: 32324750

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Project description:BackgroundReexamining the prevalence of persons infected with tuberculosis (TB) is important to determine trends over time. In 2011-2012 a TB component was included in the National Health and Nutrition Examination Survey (NHANES) to estimate the reservoir of persons infected with TB.MethodsCivilian, noninstitutionalized U.S. population survey participants aged 6 years and older were interviewed regarding their TB history and eligibility for the tuberculin skin test (TST) and interferon gamma release assay (IGRA) blood test. Once eligibility was confirmed, both tests were conducted. Prevalence and numbers of TST positive (10 mm or greater), IGRA positive, and both TST and IGRA positive were calculated by adjusting for the complex survey design after applying corrections for item nonresponse and digit preference in TST induration measurements. To examine TST positivity over time, data from NHANES 1999-2000 were reanalyzed using the same statistical methods. The TST was performed using Tubersol, a commercially available purified protein derivative (PPD), rather than PPD-S, which was the antigen used in NHANES 1999-2000. Prior patient history of TB vaccination was not collected in this study nor were patients examined for the presence of a Bacillus of Calmette and Guerin (BCG) vaccine scar.ResultsFor NHANES 2011-2012, TST and IGRA results were available for 6,128 (78.4%) and 7,107 (90.9%) eligible participants, respectively. There was no significant difference between the percentage of the U.S. population that was TST positive in 2011-2012 (4.7% [95% CI 3.4-6.3]; 13,276,000 persons) compared with 1999-2000 (4.3%; 3.5-5.3). In 2011-2012 the percentage that was IGRA positive was 5.0% (4.2-5.8) and double TST and IGRA positivity was 2.1% (1.5-2.8). The point estimate of IGRA positivity prevalence in foreign-born persons (15.9%; 13.5-18.7) was lower than for TST (20.5%; 16.1-25.8) in 2011-2012. The point estimate of IGRA positivity prevalence in U.S.-born persons (2.8%; 2.0-3.8) was higher than for TST (1.5%; 0.9-2.6).ConclusionsNo statistically significant decline in the overall estimated prevalence of TST positivity was detected from 1999-2000 to 2011-2012. The prevalence of TB infection, whether measured by TST or IGRA, remains lower among persons born in the United States compared with foreign-born persons.

Project description:BackgroundAlthough quality postnatal care (PNC) is a known significant intervention for curbing maternal and newborn morbidity and mortality, it is underutilized in most developing countries including Rwanda. Thus, it is crucial to identify factors that facilitate or occlude receipt of adequate PNC. This study aimed at assessing the prevalence of adequate PNC content and the associated factors in Rwanda.MethodsWe used weighted data from the Rwanda Demographic and Health Survey (RDHS) of 2020, comprising of 4456 women aged 15-49 years, who were selected using multistage sampling. Adequate PNC was considered if a woman had received all of the five components; having the cord examined, temperature of the baby measured, counselling on newborn danger signs, counselling on breastfeeding and having an observed breastfeeding session. We, then, conducted multivariable logistic regression to explore the associated factors, using SPSS version 25.ResultsOut of the 4456 women, 1974 (44.3, 95% confidence interval (CI): 43.0-45.9) had received all the PNC components. Having no radio exposure (adjusted odds ratio (AOR) =1.41, 95% CI: 1.18-1.68), visited by a fieldworker (AOR = 1.35, 95% CI: 1.16-1.57), no big problem with distance to a health facility (AOR = 1.50, 95% CI:1.24-1.81), and residing in the Southern region (AOR = 1.75, 95% CI: 1.42-2.15) were associated with higher odds of adequate PNC compared to their respective counterparts. However, having no exposure to newspapers/magazines (AOR = 0.74, 95% CI: 0.61-0.89), parity of less than 2 (AOR = 0.67, 95% CI: 0.51-0.86), being a working mother (AOR = 0.73, 95% CI: 0.62-0.85), no big problem with permission to seek healthcare (AOR = 0.54, 95% CI: 0.36-0.82), antenatal care (ANC) frequency of less than 4 times (AOR = 0.79, 95% CI: 0.62-0.85), inadequate ANC quality (AOR = 0.56, 95% CI: 0.46-0.68), and getting ANC in a public facility (AOR = 0.57, 95% CI: 0.38-0.85) were associated with lower odds of adequate PNC.ConclusionsLess than half of the mothers in Rwanda had received adequate PNC, and this was associated with various factors. The results, thus, suggested context-specific evidence for consideration when rethinking policies to improve adequate PNC, including a need for intensified PNC education and counselling during ANC visits, continued medical education and training of PNC providers, and strengthening of maternal leave policies for working mothers.

Project description:SettingThe 3rd national tuberculosis (TB) survey in the Philippines in 2007 reported a significant decline in the prevalence of TB. Since then, more significant investments for TB control have been made, yet TB burden estimates from routine surveillance data remain relatively stable.ObjectiveTo estimate the prevalence of bacteriologically confirmed pulmonary TB in the Philippines amongst individuals aged ≥15 years in 2016.DesignIn March-December 2016, we conducted a population-based survey with stratified, multi-stage cluster sampling of residents in 106 clusters aged ≥15 years. Survey participants were screened for TB by symptom-based interview and digital chest X-ray. Those with cough ≥2 weeks and/or haemoptysis and/or chest X-ray suggestive of TB were requested to submit 2 sputum specimens for Xpert MTB/RIF, direct sputum smear microscopy using LED fluorescent microscopy, and mycobacterial solid culture (Ogawa method). Bacteriologically confirmed pulmonary TB was defined as MTB culture positive and/or Xpert positive.ResultsThere were 46,689 individuals interviewed, and 41,444 (88.8%) consented to a chest X-ray. There were 18,597 (39.8%) eligible for sputum examination and 16,242 (87.3%) submitted at least one specimen. Out of 16,058 sputum-eligible participants, 183 (1.1%) were smear-positive. There were 466 bacteriologically confirmed TB cases: 238 (51.1%) Xpert positive, 69 (14.8%) culture positive, and 159 (34.1%) positive by both Xpert and culture. The estimated TB prevalence per 100,000 population aged ≥15 years was 434 (95% CI: 350-518) for smear-positive TB, and 1,159 (95% CI: 1,016-1,301) for bacteriologically confirmed TB.ConclusionThis nationally representative survey found that the TB burden in the Philippines in 2016 was higher than estimated from routine TB surveillance data. There was no evidence of a decline in smear and culture positive TB from the 2007 survey despite significant investments in TB control. New strategies for case-finding and patient-centered care must be intensified and expanded.

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Prevalence of tuberculosis in Rwanda: Results of the first nationwide survey in 2012 yielded important lessons for TB control.

Publications

Prevalence of tuberculosis in Rwanda: Results of the first nationwide survey in 2012 yielded important lessons for TB control.

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