Tuberculosis — Viva Defence

Opening statement (SASPOP, delivered aloud)

"Mr Alemu is a 34-year-old recent migrant with smear-positive, Xpert-confirmed pulmonary tuberculosis without molecular evidence of rifampicin resistance, complicated by a new diagnosis of HIV with a CD4 count of 120. His problems are: infectious pulmonary TB requiring urgent treatment and isolation; advanced HIV requiring antiretroviral therapy on a defined clock; the interaction and IRIS risks of treating both together; a household and workplace exposure that obliges contact tracing; and the social complexity of delivering six months of therapy to a night-shift worker in shared housing. My plan is to start standard four-drug therapy today with public-health notification, integrate ART within two weeks, build an adherence architecture around his life, and trace his contacts through the TB service." [1] [2]

Structured problem list

1. Smear-positive pulmonary TB, drug-susceptible by Xpert — infectious; needs immediate treatment, airborne isolation while infectious, and notification [1].
2. New HIV, CD4 120 — ART within 2 weeks of TB therapy on SAPiT and CAMELIA evidence; screen for other opportunistic infections and start cotrimoxazole prophylaxis per HIV guidelines [2] [3].
3. Two stigmatised diagnoses at once — counselling, linkage to HIV care, and mental-health support are clinical work, not extras.
4. Household and workplace exposure — five housemates and shared-air cleaning sites; contact investigation is mandatory [6].
5. Adherence risk — night work, shared housing, six months of therapy, pill burden about to double with ART [1].

Integrated management plan

• Treat the TB today: isoniazid, rifampicin, pyrazinamide and ethambutol for 2 months, then isoniazid and rifampicin for 4 months, weight-banded dosing, with pyridoxine; baseline LFTs, hepatitis B and C serology, creatinine, platelets, visual acuity and Ishihara colour testing [1].
• Notify and isolate: statutory notification today; airborne precautions until he has had about two weeks of effective therapy with clinical response and falling smear grade; mask him for any transport [1].
• Start ART within 2 weeks: an integrase-inhibitor-based regimen with dosing adjusted for rifampicin's induction — rifabutin substitution only if the ART choice demands it; counsel him explicitly about paradoxical IRIS before it happens [2] [4].
• Build the adherence architecture: named case manager through the TB service, observed therapy (video DOT fits night-shift work), pharmacy alignment of TB and ART refills, and a written plan for side effects so he never self-ceases [1].
• Trace contacts: the five housemates first — symptom screen, chest X-ray, IGRA or TST — then assess his cleaning sites; offer latent-TB treatment to contacts who test positive after active disease is excluded, preferring a short rifamycin regimen [6] [8].
• Monitor: monthly clinical review with vision questions on ethambutol, targeted LFTs, sputum smear and culture at 2 months, HIV viral load after ART is established [1] [7].

Probing questions with model answers

"Why two weeks for ART — why not start today, and why not wait until TB therapy finishes?" — "The evidence is a window, not a point. In SAPiT, integrating ART during TB therapy rather than sequencing it afterwards reduced mortality substantially, and CAMELIA showed that at CD4 counts this low, ART at two weeks beat eight weeks for survival. Same-day ART is not the standard — the immune reconstitution inflammation is hardest to manage when both therapies are new — and waiting six months costs lives at CD4 120. The one exception I would name unprompted is TB meningitis, where immediate ART caused more severe adverse events without survival benefit and ART is deferred to about eight weeks. He has no neurological signs, so he gets ART within two weeks." [2] [3] [5]

"He returns in six weeks with fevers, enlarging cervical nodes and worsening chest infiltrates. What is this?" — "First, a differential, not a label: treatment failure from non-adherence or unexpected resistance, a new opportunistic infection, drug reaction — and paradoxical TB-IRIS. The timeline favours IRIS: he improved initially on TB therapy, started ART two to four weeks ago, and now has inflammatory worsening. I would check adherence, repeat sputum smear and culture with susceptibility, and image; if the workup excludes failure and other infection, the answer is to continue both therapies and treat with prednisone for moderate-to-severe IRIS on randomised-trial evidence." [4]

"His housemates are all from the same region and terrified of deportation. How do you handle the contact tracing?" — "Carefully and confidentially, through the TB service. Contact investigation is a clinical service, not an immigration function, and I say that explicitly to the household. Each contact gets a symptom screen, chest X-ray and IGRA or TST; anyone positive is assessed for active disease first, then offered latent-TB treatment — I'd favour 4 months of rifampicin for completion and hepatotoxicity advantages. Vulnerable contacts are prioritised. Trust is the infection-control intervention here: if this household avoids testing, his community's transmission continues." [6] [8]

"What if his 2-month sputum culture is still positive?" — "That is a flag, not a verdict. I would look first at adherence — the continuation phase is where it quietly fails — then at drug absorption and interactions, then at resistance: repeat susceptibility testing and involve the MDR service early rather than late. A positive 2-month culture with cavitation also extends the continuation phase to seven months, nine total." [1]

"He asks whether he can keep working nights as a cleaner." — "Two separate answers. While he is infectious — roughly the first two weeks of effective therapy — he stays home, both for public health and for his own recovery. After that, cleaning work is compatible with treatment, and I will say so to his employer only with his consent. His livelihood protects his adherence, so I want him back at work as soon as he is non-infectious." [1]

Communication points

• Breaking two diagnoses in one consultation — TB first because it is immediately treatable and public-facing, HIV framed as a chronic manageable infection with effective ART, using a trained interpreter if there is any doubt about comprehension [2].
• Consent and confidentiality around notification: he is told what is reported, to whom, and that contact tracing protects his confidentiality as the index case.
• IRIS pre-counselling framed positively: "your immune system waking up can cause a temporary flare — call us, don't stop the tablets" [4].
• Stigma and employment: a letter for his employer only with consent, and explicit reassurance about what TB notification does and does not share.