DOWNLOAD THE COMPLETE PROJECT

2 Users found this project useful

Effect of Community-Based Tuberculosis Screening on Tuberculosis Detection among Household Contacts in Nigeria

Abstract

Tuberculosis remains an important public health concern in Nigeria, particularly among individuals who have close and prolonged contact with persons affected by tuberculosis. Household contacts may have an increased risk of tuberculosis infection and disease because of repeated exposure within shared living environments. Tuberculosis may remain undetected when symptoms are mild, overlooked, or attributed to other common illnesses, while fear of stigma, limited awareness, financial constraints, geographical barriers, and inadequate access to diagnostic services may delay healthcare seeking and diagnosis. Delayed detection and treatment can increase the risk of disease transmission within households and communities and may contribute to avoidable complications and mortality. Community-based tuberculosis screening provides an opportunity to identify tuberculosis among household contacts through active case-finding activities conducted within communities, households, primary healthcare centres, mobile outreach programmes, and other accessible health platforms. Early detection may facilitate timely diagnostic confirmation, treatment initiation, contact investigation, and appropriate follow-up, thereby reducing opportunities for continued transmission. However, inadequate screening coverage, limited diagnostic capacity, shortage of trained healthcare workers, insufficient community awareness, stigma, transportation barriers, and weak referral and follow-up systems may limit the effectiveness of community-based tuberculosis screening programmes in Nigeria. Against this background, this study investigates the effect of community-based tuberculosis screening on tuberculosis detection among household contacts in Nigeria. The study will be anchored on the Health Belief Model, Social Ecological Model, and the Health Systems Framework. The Health Belief Model explains how household contacts' perceptions of susceptibility to tuberculosis, perceived severity, perceived benefits of screening, perceived barriers, and cues to action may influence participation in community-based tuberculosis screening. The Social Ecological Model emphasizes the influence of individual, interpersonal, household, community, and environmental factors on tuberculosis-related health behaviours and access to screening and diagnostic services. The Health Systems Framework emphasizes service delivery, health workforce, health information, medical products and technologies, financing, and accessibility as essential components of effective tuberculosis screening and case-detection programmes. Collectively, these theoretical perspectives provide a suitable framework for explaining how community-based tuberculosis screening may influence tuberculosis detection among household contacts in Nigeria. The study will adopt a quantitative cross-sectional analytical or quasi-experimental research design. The study population will comprise household contacts of individuals diagnosed with tuberculosis in selected communities across Nigeria. A multistage sampling technique will be used to select states, local government areas, communities, households, and eligible household contacts. Community-based tuberculosis screening will be measured using indicators such as availability of community screening services, screening coverage, frequency of active case-finding activities, household contact tracing, symptom screening, access to tuberculosis diagnostic testing, availability of trained healthcare workers, community health education, sputum collection and referral arrangements, and follow-up activities. Tuberculosis detection will be assessed using indicators such as identification of presumptive tuberculosis cases, positive tuberculosis test results, confirmed tuberculosis cases, newly detected cases, bacteriologically confirmed cases where applicable, clinically diagnosed cases, referral for further diagnostic assessment, treatment initiation, and linkage to tuberculosis care. Data will be collected using structured questionnaires, community screening registers, household contact-tracing records, tuberculosis screening forms, laboratory reports, healthcare facility records, referral registers, and relevant programme documents. Descriptive statistics will be used to summarize participants' characteristics, screening coverage, tuberculosis-related findings, and patterns of tuberculosis detection. Inferential statistical techniques, including chi-square tests, correlation analysis, and logistic or multiple regression analysis, will be used to determine the effect of community-based tuberculosis screening on tuberculosis detection. Where appropriate, tuberculosis detection rates before and after implementation of community-based screening activities may be compared to determine changes associated with the intervention. Diagnostic tests will also be conducted to assess the reliability, validity, and robustness of the findings. The study is expected to find that community-based tuberculosis screening has a significant positive effect on tuberculosis detection among household contacts in Nigeria. Household contacts who participate in community-based tuberculosis screening are expected to have a higher likelihood of having previously undetected tuberculosis identified than contacts without access to systematic screening services. Active household contact screening may facilitate early identification of individuals with tuberculosis symptoms and timely referral for diagnostic testing and treatment. Bringing screening services closer to households may reduce geographical, financial, and time-related barriers and encourage individuals who may otherwise delay seeking care to undergo assessment. Early detection and treatment may reduce the duration of infectiousness and the likelihood of further transmission within households and communities. Community-based screening may also increase awareness of tuberculosis symptoms, transmission, prevention, and the importance of completing recommended diagnostic and treatment procedures. Conversely, inadequate screening coverage, limited diagnostic facilities, shortages of trained personnel, stigma, fear, transportation difficulties, financial constraints, and weak referral and follow-up systems may reduce the effectiveness of community-based tuberculosis screening. The study therefore expects accessible and well-organized community-based tuberculosis screening to contribute significantly to improved tuberculosis detection and timely linkage to care among household contacts in Nigeria. The study is expected to contribute to the literature on community-based tuberculosis screening, tuberculosis detection, household contact investigation, active case finding, tuberculosis prevention, infectious disease control, community health services, and public health in Nigeria. The findings will provide useful information to the Federal Ministry of Health and Social Welfare, National Tuberculosis and Leprosy Control Programme, National Primary Health Care Development Agency, state tuberculosis control programmes, primary healthcare centres, hospitals, community health workers, development partners, and policymakers regarding strategies for improving early detection of tuberculosis among household contacts. The study will also provide evidence-based recommendations for expanding community-based tuberculosis screening and household contact investigation, improving access to diagnostic services, strengthening community health education, increasing availability of trained healthcare workers and diagnostic resources, reducing tuberculosis-related stigma, improving referral and follow-up systems, strengthening linkage to treatment, and supporting active tuberculosis case-finding strategies across Nigeria.

Keywords: Community-based tuberculosis screening, tuberculosis detection, household contacts, tuberculosis case finding, contact investigation, tuberculosis prevention, infectious disease control, community health services, early detection, Nigeria, public health.