Tuberculosis infection control guidelines

Objectives

Namibia’s tuberculosis infection-control framework aims to prevent and reduce airborne transmission of Mycobacterium tuberculosis in health facilities, households, communities and congregate settings, particularly where HIV prevalence is high and among patients and staff at increased risk of infection or disease progression.[1][2][3]It responds to a high national tuberculosis burden, HIV-associated tuberculosis, delayed diagnosis, drug-resistant tuberculosis and the risk of healthcare-associated transmission.[4][2]

• Establish facility infection-control plans that enable prompt identification of tuberculosis suspects, airborne precautions, expedited diagnosis and treatment, and reduced exposure time in healthcare settings.[5]
• Prioritise people living with HIV, healthcare workers, students, volunteers, cleaners, porters and other staff who may be exposed to infectious tuberculosis in clinical or congregate settings.[1][6][7]
• Apply a hierarchy of organisational activities, administrative controls, environmental controls and personal respiratory protection, with administrative controls given the highest operational priority.[5][8]
• Strengthen integrated tuberculosis and HIV services, particularly in HIV-care settings and voluntary counselling and testing centres, through rapid screening, separation, investigation and treatment of people with suspected or confirmed tuberculosis.[9]
• Prevent cross-infection involving drug-resistant tuberculosis by separating patients with presumed or confirmed drug-resistant disease from people with presumed drug-sensitive tuberculosis and non-tuberculosis patients.[10]
• Extend appropriate infection-control measures beyond hospitals to prisons, holding cells, households and other congregate settings where transmission risk may be high.[1][3]
• Adapt measures to individual facilities, institutions and Namibia’s varying climatic conditions, while pursuing rational, affordable and cost-effective interventions.[1][2]

Implementation

Implementation combines national organisational support with facility-level administrative, environmental and personal protective measures. The National Tuberculosis Control Programme led development through consultation with national, regional and district programme staff, local partners, the Quality Assurance Division, the Directorate of Special Programmes and the Permanent Secretary, and the guidance is to be integrated into the Ministry of Health and Social Services’ wider infection-control document while retaining a separate training and implementation version.[2][11]Development also involved the Ministry of Health and Social Services, KNCV Tuberculosis Foundation, CDC Namibia and the Global Fund.[1]

• Develop written infection-control plans and standard operating procedures for each facility, assign a designated lead reporting to district coordinating structures, and establish infection-control committees in referral and district hospitals.[12][13]
• Screen people on arrival for cough, tuberculosis investigation or treatment; educate suspected or confirmed cases in cough etiquette; separate them in well-ventilated areas; expedite the services they originally sought; and arrange prompt diagnostic investigation or referral.[14][13]
• Collect sputum outdoors or in a well-ventilated area away from other people, rather than in toilets or enclosed spaces.[9][14]
• Use timely laboratory diagnosis, appropriate triage, separation and isolation to identify infectious cases rapidly, while treating tuberculosis suspects as potentially infectious until investigation is complete.[2][11]
• Prefer ambulatory management where appropriate, assess admitted patients for early discharge, provide directly observed treatment, and coordinate home infection-control advice with drug-resistant tuberculosis and infection-control committees.[12]
• Separate infectious patients from non-tuberculosis patients and, where feasible, separate drug-resistant tuberculosis patients in ventilated individual rooms, designated wards or separate buildings at referral centres.[10]
• Use natural ventilation where possible and consider mechanical ventilation, filtration, negative-pressure rooms or ultraviolet germicidal irradiation where natural ventilation is inadequate or drug-resistant tuberculosis risk is high.[15]
• Provide N95 respirators as a complement to administrative and environmental controls in high-risk areas, conduct fit testing before first use and annually thereafter, and maintain respirators in clean, dry storage.[16]
• Apply specialised controls in laboratories and procedure areas, including appropriate biosafety cabinets for liquid tuberculosis suspensions, and minimise use of bronchoscopy and sputum induction while ensuring ventilation and respiratory protection when these procedures are necessary.[8][17][3]
• Train staff before assignment and annually thereafter, including clinical personnel and support staff, on transmission, diagnosis, facility plans, tuberculosis-HIV interactions and their respective infection-control roles.[18][7]
• Educate patients and communities through posters, pamphlets and tuberculosis-HIV communication activities on symptoms, healthcare seeking, investigations, self-protection and cough hygiene.[18]
• Monitor implementation through facility review and supervision checklists completed at baseline and every six months, monthly cough-register monitoring, routine surveillance, inspections and review by tuberculosis infection-control committees.[19]
• Track indicators covering written plans, functional district committees, active screening, healthcare-worker tuberculosis risk, case notification, staff training, isolation facilities and uninterrupted N95-mask availability.[19]
• Maintain case-and-suspect registers, follow up referrals, record diagnostic and treatment outcomes, report screening results quarterly, and revise plans when responsibilities, policies or procedures change.[20][21]

Monitoring & Evaluation

The tuberculosis infection-control monitoring and evaluation system combines facility-level implementation monitoring, routine surveillance, periodic review, staff protection, and reporting to support programme improvement and accountability.[3][19][13][20]

• Conduct tuberculosis infection-risk assessment and surveillance at all health-system levels, including monitoring infection and disease among health-care workers where feasible.[5][18]
• Collect and screen data continuously to detect potential outbreaks, and periodically review tuberculosis surveillance data for patients and health-care workers to identify infection problems and undesirable trends.[3][19]
• Use a strategic monitoring framework that covers inputs, processes, outputs, outcomes and impact, with National Tuberculosis Control Programme guidance for national and sub-national implementation.[3]
• Track process, outcome and impact indicators, including written facility infection-control plans, functional district committees and meetings, active cough screening, health-care-worker tuberculosis risk, case-notification rates, training, isolation facilities, and continuous availability of N95 masks without stock-outs.[19]
• Complete the Facility Review Checklist and Health Facility Supervision Checklist at baseline and every six months through collaboration between the District TB Coordinator and District Coordinating Committee, and send results to the national office.[19]
• Monitor and report Facility Cough Register data monthly through the District TB Coordinator, alongside routine surveillance, special studies, surveys, and internal and external inspections.[19]
• Assess programme performance, service quality, effectiveness, resource use, implementation problems and solutions, learning, accountability, and progress towards tuberculosis infection-control objectives.[3]
• Monitor adherence to infection-control plans and standard operating procedures, correct inappropriate practice, enforce institutional policies, and periodically review policies and guidelines.[9][14][5][18]
• Assign infection-control leadership to oversee written-plan development, implementation monitoring, and staff training, with facility officers reporting to district coordinating structures.[12][13]
• Use referral feedback to assess links with diagnostic services, referral appropriateness, completion of investigation, treatment registration, and the proportion of suspected cases confirmed as tuberculosis.[12][21][20]
• Maintain a tuberculosis case and suspect register recording patient details, suspected or confirmed status, missed intake screening, referral destination, and referral outcome.[20]
• Report screening results quarterly to relevant management and staff, and maintain a separate register for health-care-worker induction and annual infection-control training.[20]
• Increase monitoring frequency during implementation initiation, potentially monthly or every two months, and undertake annual monitoring when procedures are functioning well.[21]
• Revise facility infection-control plans when staff responsibilities, policies or procedures change, and identify corrective actions and incentives to support adherence.[21][20]
• Evaluate isolation frequently to determine whether it remains necessary, including through sputum smear and culture results for drug-resistant tuberculosis patients.[7]
• Monitor ultraviolet germicidal irradiation intensity, lamp cleaning and replacement, equipment maintenance, staff training, and prevention of harmful exposure where this intervention is used.[15]
• Conduct respirator fit testing before first use and annually thereafter, replacing or adjusting respirators when staff fail testing and maintaining respirators in clean, dry storage.[16]

Health-care-worker surveillance is recognised as difficult because of tuberculosis and HIV/AIDS stigma, limited occupational-health follow-up systems, and challenges in interpreting tuberculin skin-test conversion after widespread Bacille Calmette-Guérin vaccination.[5]Detailed indicator definitions, quantitative targets, and comprehensive reporting schedules are not provided in the supplied excerpts.[3][19]

Costing & Financing

Financing information is limited: the framework requires planning, budgeting and provision of resources for tuberculosis infection-control implementation, but does not specify budget amounts, allocations, financing gaps, or a resource-mobilisation plan.[18][19]

• Mobilise organisational resources for policy development, risk assessment, surveillance, coordination, staff training, communication, community awareness, operational research, and implementation of infection-control plans.[18]
• Prioritise rational, affordable and cost-effective infection-control measures, with administrative controls and patient separation forming the principal basis of protection and engineering controls used where necessary.[2][5]
• Recognise natural ventilation as the simplest and least expensive environmental-control method, while filtration equipment requires costly purchase and maintenance.[15]
• Concentrate costly personal respiratory-protection devices in high-risk areas rather than applying them indiscriminately throughout facilities.[16]
• Consider biosafety cabinets a relatively expensive laboratory-control intervention, with Class II cabinets more expensive than Class I cabinets.[17]

Development of the guidelines was supported by the KNCV Tuberculosis Foundation, CDC Namibia and the Global Fund, but the excerpts do not identify the amount, period or type of this support.[1]No explicit monetary values, funding sources for implementation, economic assumptions, or quantified funding gaps are supplied.[2][10][3]