Suspected pulmonary tuberculosis in a long-distance driver
A 37-year-old man who drives a long-distance truck presents to the soum health centre with a 4-week cough producing blood-streaked sputum, night sweats, and weight loss of 6 kg. He smokes 20 cigarettes a day and drinks alcohol heavily. He lives in a three-room apartment with his wife, his mother and three children aged 2, 6 and 9 years. He has never been treated for tuberculosis. On examination he is thin, temperature 37.6°C, pulse 96/min, respirations 20/min, and crackles are heard in the right upper zone. The soum has a light microscope but no Xpert MTB/RIF machine; sputum is sent to the aimag laboratory and results return in 3 days. A chest X-ray is not available at the soum. HIV rapid testing is available and the result is negative. The national tuberculosis programme expects suspected cases to be notified. The patient is reluctant to give sputum because he must leave for work tomorrow.
1. Outline your diagnostic work-up and initial management before the laboratory result returns. Include what you would do about starting treatment.
Read the worked answer
Diagnostic work-up:
- Collect two sputum specimens - one spot sample now and one early-morning sample tomorrow - and send them to the aimag laboratory for Xpert MTB/RIF and smear microscopy. Xpert is the preferred initial test because it detects Mycobacterium tuberculosis and rifampicin resistance.
- Request a chest X-ray at the aimag hospital or arrange for the patient to be seen there; upper-zone crackles are consistent with tuberculosis but not diagnostic.
- HIV testing is already negative; repeat only if there is ongoing risk.
- Assess for extrapulmonary disease: lymph nodes, abdomen, spine and meningeal signs.
- Check liver function and alcohol history before treatment, because isoniazid and rifampicin are hepatotoxic.
Initial management: do not start empirical anti-tuberculosis treatment at the soum unless the patient is severely ill and the TB programme agrees. Treatment is normally initiated at the TB dispensary after bacteriological confirmation. However, if he deteriorates or has extensive disease, arrange urgent referral rather than waiting 3 days at home.
Practical step: persuade him not to leave for work. A suspected infectious case who travels in a shared truck cab exposes others. Explain that the sputum result determines his treatment and that he can return to work once cleared or on treatment.
2. Describe the notification, contact investigation and confidentiality issues in this small community.
Read the worked answer
Notification: tuberculosis is a notifiable disease in Mongolia. Notify the soum and aimag TB dispensary promptly - do not wait for the laboratory result. Use the national notification form and record the date, symptoms, sputum sent and HIV status.
Contact investigation: the household is the priority. Screen his wife, mother and three children for cough, fever, weight loss and known TB contact. Children under 5 years are at high risk: after active TB is excluded, they should be offered isoniazid preventive therapy according to national guidance. Check BCG scars and nutritional status. Arrange chest X-rays for adult contacts.
Confidentiality: do not disclose his diagnosis to neighbours or his employer without his consent, except where the law requires notification to public health authorities. In a small soum, gossip is a real harm. Explain to him what will be shared and why. If he drives a truck, discuss with him - not with his employer - the need to avoid close contact with others until he is non-infectious.
Documentation: record the counselling, contacts identified and notification date. Give him a written referral slip for the TB dispensary and explain that treatment is free.
3. What infection-control advice will you give the family and the patient, including for travel and home isolation?
Read the worked answer
At home:
- Sleep in a separate, well-ventilated room if possible; open a window even in winter for short periods - fresh air reduces transmission.
- Cover the mouth and nose with a tissue or the elbow when coughing; dispose of tissues safely.
- Wear a surgical mask when in shared rooms during the infectious period.
- Do not share cups, spoons or towels.
- Sputum should be collected in a covered container and disposed of safely, not on the ground.
For travel: he should not travel in a shared truck cab or on public transport until the TB dispensary confirms he is non-infectious, usually after 2 weeks of effective treatment with clinical improvement. If travel is unavoidable, he must wear a mask and keep the window open.
Children: keep them away from his face-to-face contact as much as possible, and bring them for screening. BCG protects against severe childhood TB but does not prevent infection.
Alcohol and smoking: explain that both worsen tuberculosis and liver toxicity from drugs. Offer brief advice and referral for alcohol treatment; do not moralize.
Follow-up: give a clear date for the sputum result and the TB dispensary appointment. Arrange directly observed treatment through the soum if the TB programme approves.