By Adeyinka Joseph Alonge, a public health professional, researcher, and writer with interests spanning health, science, technology, personal development, and practical knowledge for everyday life.
Tuberculosis and HIV are separate infections, but they are closely connected.
HIV weakens the immune system, making it more difficult for the body to contain tuberculosis bacteria. TB can then develop more easily and progress more rapidly in a person living with HIV.
This combination, known as TB and HIV co-infection, creates a serious clinical and public-health challenge. A patient may need HIV treatment, TB testing, tuberculosis medicine, laboratory monitoring, adherence support, and help navigating different healthcare services at the same time.
Nigeria remains one of the countries with a high tuberculosis burden. WHO reported in March 2026 that Nigeria was estimated to have approximately 510,000 new TB cases annually, including about 61,000 cases among children. In 2025, the country reported 458,534 diagnosed TB cases, reflecting improvements in case detection but also showing the scale of the continuing challenge.
Finding people with TB is only the first step. They must also receive their results, start appropriate treatment, remain in care, and complete the recommended treatment course.
This is where community linkage models become important.
What Is TB and HIV Co-Infection?
TB and HIV co-infection means that a person has both tuberculosis and HIV.
Tuberculosis is caused by bacteria known as Mycobacterium tuberculosis. It most commonly affects the lungs, although it can also affect the lymph nodes, spine, abdomen, brain, and other parts of the body.
HIV attacks the immune system, particularly CD4 cells that help the body respond to infections.
A person can have TB infection without feeling ill. This is commonly called latent TB infection. When the immune system can no longer control the bacteria, the person may develop active TB disease.
People living with HIV have a greater likelihood of developing active TB than people without HIV. Globally, WHO estimated that HIV infection contributed to approximately 570,000 new TB cases in 2024.
Why Is TB and HIV Co-Infection a Distinct Challenge?
TB and HIV co-infection cannot be managed effectively by treating the two conditions as unrelated problems.
The patient may face overlapping clinical, treatment, and social challenges.
Symptoms may be less typical
Pulmonary TB commonly causes symptoms such as:
Persistent cough
Fever
Night sweats
Weight loss
Weakness
Reduced appetite
Coughing up blood in some cases
However, TB can present differently in people with advanced HIV. Some patients may have disease outside the lungs, less obvious chest findings, or symptoms that resemble other infections.
This makes appropriate screening, diagnostic testing and clinical assessment especially important.
The patient may need several medicines
A person with TB and HIV may need:
A complete course of TB treatment
Antiretroviral treatment for HIV
Preventive medicines where clinically indicated
Treatment for other infections or health conditions
Laboratory and clinical monitoring
Healthcare providers must consider possible interactions between medicines, side effects and the timing of treatment.
Nigeria’s national TB/HIV guidance includes TB treatment for people living with HIV, antiretroviral therapy, TB preventive treatment for eligible people without active TB and infection-control measures at healthcare facilities.
Treatment schedules can be demanding.
A patient may need to attend different service points for:
HIV clinic appointments
TB screening
Sputum testing
Medicine collection
Viral-load testing
Side-effect assessment
Treatment-adherence support
When services are poorly coordinated, patients may repeat visits, lose income, spend more on transportation, or abandon care entirely.
Stigma may affect both conditions.
TB and HIV are both affected by misinformation and stigma.
A person with TB may fear being avoided because others believe every form of contact is dangerous. A person with HIV may fear rejection, involuntary disclosure or discrimination.
When the two conditions occur together, this fear can become stronger.
Some patients delay testing or care because they do not want family members, employers or neighbours to know why they are visiting a particular clinic.
Treatment interruptions have serious consequences.
Interrupting HIV treatment can allow the viral load to rise and weaken the immune system.
Interrupting TB treatment can allow the infection to persist, increase the risk of transmission and contribute to drug-resistant tuberculosis.
Good linkage systems therefore need to do more than refer patients once. They must help people start and continue care.
Why TB Screening Matters for People Living With HIV
Routine TB screening is an essential part of HIV care.
People living with HIV should be assessed regularly for possible TB symptoms and exposure. Those with symptoms or other indications require appropriate diagnostic evaluation.
Where active TB has been ruled out, eligible people living with HIV may be offered TB preventive treatment. This reduces the likelihood that TB infection will progress to active disease.
Nigeria’s TB/HIV programme identifies the reduction of TB and HIV burden among people affected by both diseases as a central goal of collaborative activities.
Likewise, people diagnosed with TB should be offered voluntary HIV testing with proper counselling and confidentiality. Knowing both conditions early allows treatment to be planned appropriately.
What Does “Linkage to Care” Mean?
Linkage to care is the organised process of helping a person move from identification or diagnosis into appropriate treatment and support.
It is not the same as simply giving someone the name of a hospital.
A strong linkage process may include:
Explaining the result clearly
Identifying the appropriate treatment facility
Obtaining the patient’s consent for referral
Contacting the receiving facility
Scheduling an appointment
Helping the patient understand where to go
Supporting transportation where resources permit
Following up to confirm arrival
Confirming that treatment was started.
Continuing adherence and retention support
The final goal is not a completed referral form. The goal is a patient who successfully enters care, receives treatment, and remains supported.
How Community Linkage Works in Practice
Community linkage models bring services and support closer to the places where people live, work and seek help.
They may involve community health workers, peer navigators, treatment supporters, civil-society organisations, volunteers, healthcare facilities and public-health programmes.
Community TB screening
Community teams can help identify people with possible TB symptoms and refer them for testing.
Screening may take place through:
Household visits
Community outreaches
HIV service points
Pharmacies
Religious or community organisations
Workplaces
Schools or youth programmes where appropriate
Contact investigation around a confirmed TB case
Community screening does not replace diagnosis. It identifies people who should receive proper testing.
Sputum collection and transportation
Some patients live far from facilities that provide molecular TB testing.
Programmes may arrange for sputum samples to be collected at a community or lower-level facility and transported to a testing site. Results are then returned to the referring provider or patient.
This reduces the number of long journeys a patient must make before receiving a diagnosis.
Peer navigation
Peer navigators are trained individuals who understand the experiences of the population they support.
They may help patients:
Understand the diagnosis
Prepare for clinic visits.
Discuss concerns about treatment.
Identify barriers to attendance.
Navigate different service points
Maintain motivation during treatment
Return to care after missed appointments
Peer support can be particularly valuable when a patient feels isolated or fears judgement.
Accompanied referral
An accompanied referral provides more support than handing a patient an address.
A community worker may:
Call the receiving facility
Explain what the patient should expect
Help arrange an appointment
Travel with the patient when appropriate
Introduce the patient to the receiving healthcare team
Confirm that services were received
This can be especially helpful immediately after diagnosis, when a person may feel anxious or overwhelmed.
Telephone and digital follow-up
Telephone calls, text messages and secure digital communication can support:
Appointment reminders
Treatment check-ins
Return of appropriate information
Symptom monitoring
Identification of missed visits
Referral troubleshooting
These tools must be used carefully. Messages should not expose a patient’s HIV or TB status on a shared phone or through unsecured communication.
Treatment supporters
With the patient’s consent, a trusted person may provide practical and emotional support during treatment.
A treatment supporter may remind the patient about medicines, encourage clinic attendance and help identify challenges early.
The supporter should respect confidentiality and should not control, threaten or shame the patient.
The Barriers Patients Face
Patients do not usually disengage from care simply because they do not value their health.
Many face practical and social barriers that make continued care difficult.
Transportation
A patient may need to travel several kilometres for diagnosis, medicine collection or laboratory monitoring.
Transportation becomes more difficult when:
Services are available only at distant facilities
Patients require several separate appointments
Public transport is unreliable
The patient is physically weak
Travel costs consume a large part of household income
Referral systems can reduce this burden through decentralised services, sample transportation, coordinated appointments and community medication support where permitted.
Cost
TB testing and treatment may be available without direct payment through approved public programmes, but patients can still face indirect costs.
These may include:
Transportation
Food during clinic visits
Lost wages
Childcare
Additional laboratory or registration expenses
Accommodation when travelling long distances
Good linkage models identify these pressures early instead of assuming that a referred patient can easily reach the facility.
Stigma and fear of disclosure
Some patients worry that neighbours will recognise a clinic vehicle or that employers will discover repeated absences.
Others may fear that family members will associate TB treatment with HIV, even when the patient has not disclosed their status.
Community workers can help patients develop safe and realistic plans for attending care while protecting confidentiality.
Stigma should never be addressed by forcing disclosure. The patient must remain involved in decisions about who knows their health information.
Weak referral communication
A patient may arrive at a referred facility and discover that:
Staff were not expecting them
The required service is unavailable
The testing machine is not working
The clinic operates only on certain days
They were sent to the wrong department
Their referral information is incomplete
These failures increase frustration and may discourage the person from returning.
A closed-loop referral system confirms that the receiving facility is appropriate, the patient arrived and the required service was provided.
Long waiting times
A patient may spend an entire day at a health facility, even when the actual consultation takes only a few minutes.
This is particularly difficult for people who work, attend school, care for children or depend on daily income.
Appointment systems, coordinated HIV and TB visits, differentiated service delivery and improved patient flow can reduce unnecessary waiting.
Food insecurity and poor nutrition
TB can cause weight loss and weakness. Some medicines may also be difficult to tolerate when a person has not eaten.
A patient who lacks reliable food may struggle to take medicines consistently or recover fully.
Referral systems should recognise social needs and connect eligible patients to available nutritional, welfare or community support.
Why Referral Systems Improve Outcomes
Referral systems work when they remove the points where patients are most likely to become lost between services.
They shorten the time to treatment
A person with symptoms may first visit a pharmacy, community outreach or primary healthcare centre.
Without a clear referral pathway, the person may move between providers without being tested.
A structured system connects the person quickly to an appropriate diagnostic service and follows the result through to treatment initiation.
They connect TB and HIV services
A patient should not have to navigate two completely separate programmes alone.
Integrated or coordinated services can help ensure that:
People with TB are offered HIV testing
People living with HIV are screened for TB
Co-infected patients receive both treatments
Eligible patients receive TB preventive treatment
Laboratory and pharmacy appointments are coordinated
Treatment interactions and side effects are monitored
They identify missed appointments early
Waiting several months before noticing that a patient has stopped attending care allows health risks to grow.
Community and facility teams can use appointment records to identify missed visits and make respectful follow-up contact.
The purpose is to understand what happened and support re-entry into care, not to punish the patient.
They improve accountability
A referral is incomplete until the receiving service confirms that the patient was attended to.
Tracking referrals helps programmes identify:
Facilities with long delays
Testing bottlenecks
Missing results
Transportation challenges
Areas with weak service coverage
Groups that are not being reached effectively
This information can be used to improve programme quality.
What Makes a Community Linkage Model Effective?
A strong model should be:
Patient-centred
The system should respond to the person’s health needs, preferences and circumstances rather than forcing every patient through an identical process.
Confidential
Health information should be shared only with authorised people and for legitimate care purposes.
Voluntary
Testing, referral and support should be offered with informed consent. Patients should not be coerced.
Integrated
TB and HIV services should communicate and coordinate rather than operate as isolated programmes.
Trackable
Programmes should know whether referred patients reached care, started treatment and remained engaged.
Respectful
Community workers and healthcare providers must avoid blame, judgement and discriminatory language.
Sustainable
The model should use realistic systems that can continue beyond a short project or funding cycle.
Community Linkage Does Not Replace the Health Facility
Community services are not a substitute for trained clinical care, laboratory diagnosis or medicine management.
Their role is to connect patients to those services and help remove barriers that may prevent successful treatment.
Community and facility systems should therefore work as one pathway:
Community identification → testing → diagnosis → referral → treatment initiation → adherence support → treatment monitoring → completion or continued HIV care
When one part fails, the patient may be lost.
What Should Patients and Families Know?
TB is preventable, treatable and curable in most cases when the correct medicine is taken as prescribed.
HIV is manageable with effective antiretroviral treatment.
People with TB symptoms should seek testing promptly, especially if they are living with HIV or have been in close contact with someone diagnosed with TB.
Patients should:
Take medicines exactly as prescribed
Report side effects to healthcare providers
Attend scheduled appointments
Avoid stopping treatment without medical guidance
Ask questions when instructions are unclear
Inform providers about all medicines they are taking
Seek support when transportation, food or stigma threatens treatment continuity
Family members can help by providing encouragement, supporting clinic attendance and avoiding discrimination.
Where Can People Seek TB Services in Nigeria?
Nigeria’s National Tuberculosis and Leprosy Control Programme provides a toll-free number for people who need help locating free TB testing and treatment services.
Call 3340 to find an approved TB testing or treatment centre near you.
Anyone with a persistent cough, unexplained weight loss, fever, night sweats or possible exposure to TB should seek professional assessment.
Symptoms alone cannot confirm TB. Proper testing is required.
Frequently Asked Questions
Can someone have TB and HIV at the same time?
Yes. This is called TB and HIV co-infection. HIV weakens the immune system and increases the likelihood that TB infection will progress to active disease.
Is TB always a sign that someone has HIV?
No. Anyone can develop TB. However, people diagnosed with TB should be offered voluntary HIV testing because knowing their status helps providers plan appropriate care.
Can TB be cured in a person living with HIV?
Yes. TB can usually be cured when the correct treatment is completed. The patient must also receive appropriate HIV care and clinical monitoring.
Should HIV treatment stop during TB treatment?
Patients should not stop antiretroviral treatment without medical guidance. Healthcare providers will determine the appropriate treatment timing and manage possible medicine interactions.
What does linkage to care mean?
Linkage to care is the organised process of helping a person move from screening or diagnosis into the correct treatment service and confirming that care was received.
Is community TB screening a final diagnosis?
No. Community screening identifies people who may need further investigation. TB must be diagnosed using approved clinical and laboratory procedures.
Is TB treatment free in Nigeria?
TB testing and treatment are provided without charge through approved public TB programmes, although patients may still face indirect expenses such as transportation and time away from work. The national toll-free number 3340 can help people locate services.
Can a person with TB spread it to everyone they meet?
TB usually spreads through the air when a person with infectious pulmonary TB coughs, speaks or sneezes. It is not normally spread by shaking hands, sharing plates or touching surfaces.
Appropriate treatment greatly reduces infectiousness, but patients should follow the specific infection-control advice given by their healthcare providers.
Final Thoughts
TB and HIV co-infection is not only a medical challenge. It is also a challenge of access, coordination, communication and trust.
A patient may receive an accurate diagnosis and still fail to benefit if transportation is unaffordable, referrals are incomplete, stigma prevents clinic attendance or different services do not communicate.
Community linkage models work because they address what happens between diagnosis and successful treatment.
They bring screening closer to communities, connect patients with appropriate facilities, help resolve practical barriers and support people throughout treatment.
The strongest systems do not simply count referrals. They confirm that patients reached care, started treatment and received the support needed to continue.
Interested in Public Health Work?
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Readers interested in contributing to health programmes can explore the latest opportunities under the Public Health and Development Jobs section of this blog.
Author: Adeyinka Joseph Alonge is a public health professional, researcher and writer with interests spanning health, science, technology, personal development and practical knowledge for everyday life.
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