Clinical presentation of tuberculosis in HIV-infected persons — MSF Tuberculosis — Médecins Sans Frontières 2026

Q: How does TB presentation differ in early versus advanced HIV infection?

In early HIV infection with relatively normal immune function, TB presents similarly to HIV-negative individuals. As immunosuppression advances, smear-negative PTB, disseminated TB and EPTB become more common, are harder to diagnose, and have higher fatality rates.

Q: What CD4 count thresholds indicate risk for specific opportunistic infections?

PCP typically occurs at CD4 <200, whilst cytomegalovirus pneumonia occurs at CD4 <50. PCP is unlikely in patients taking co-trimoxazole prophylaxis.

Q: How can I distinguish PCP from PTB in an HIV-infected patient?

PCP shares insidious onset, persistent cough and fever with PTB but causes greater dyspnoea, rarely produces effusions, and is not usually accompanied by haemoptysis. PCP occurs at CD4 <200 and is unlikely with co-trimoxazole prophylaxis.

Q: What are the most common forms of EPTB in HIV-infected adults?

The most common EPTB in HIV-infected adults are lymph node TB, pleural effusion, pericarditis, TB meningitis and miliary TB. In children, miliary TB, TB meningitis and diffuse lymphadenopathy are most common.

MSFClinical guideline (chapter)Current edition

From Tuberculosis › Chapter 2: Clinical presentation · Médecins Sans Frontières, Current online edition, 2026

MSF guidance on recognising and differentiating TB in people living with HIV, from early to advanced immunosuppression.

In one sentenceTB in HIV-infected persons varies from typical presentation in early infection to smear-negative, disseminated and extrapulmonary forms in advanced immunosuppression (CD4 <200), requiring differentiation from PCP, Kaposi's sarcoma and other opportunistic infections.

Issuer: Médecins Sans Frontières
Edition: Current online edition, 2026
Audience: Clinicians managing TB-HIV co-infected patients in resource-limited settings
Evidence: Expert consensus with cited references
Reviewed: 21 Oct 2026 · GMJ

Read the original on MSF Whole guideline (PDF)

Summary by GMJ Guidelines Desk•Reviewed by Prof. Giorgi Pkhakadze, MD, MPH, PhD•Record updated 21 Oct 2026•Next check Apr 2027

What this guideline says

GMJ summary

This section of the MSF tuberculosis guideline addresses the clinical presentation of TB in HIV-infected persons, who experience TB as the most common opportunistic infection and a leading cause of death. According to WHO clinical staging, pulmonary TB (PTB) places individuals in stage 3, whilst extrapulmonary TB (EPTB) indicates stage 4 disease.

In early HIV infection with relatively preserved immunity, TB presents similarly to HIV-negative individuals. However, as immunosuppression advances, smear-negative PTB, disseminated TB and EPTB become more common, are harder to diagnose, and carry higher fatality rates. Patients may struggle to expectorate sputum, requiring advanced collection techniques.

The guideline provides a differential diagnosis table for PTB in HIV-infected persons, covering bacterial and atypical pneumonias, Pneumocystis jirovecii pneumonia (PCP), pulmonary Kaposi’s sarcoma, and less common fungal and bacterial infections. Common EPTB manifestations differ between children (miliary TB, TB meningitis, diffuse lymphadenopathy) and adults (lymph node TB, pleural effusion, pericarditis, TB meningitis, miliary TB). Immune reconstitution inflammatory syndrome (IRIS) is noted as a distinct clinical presentation in patients starting antiretroviral therapy.

Key points

For clinicians — doses and thresholds as stated in the guideline

TB is the most common opportunistic infection and leading cause of morbidity and mortality in HIV-infected persons
PTB places patients in WHO clinical stage 3; EPTB indicates stage 4 HIV disease
As immunosuppression advances, smear-negative PTB, disseminated TB and EPTB become more common with higher fatality rates
PCP typically occurs at CD4 <200 and is unlikely in patients taking co-trimoxazole prophylaxis
Cytomegalovirus pneumonia occurs at CD4 <50
Common EPTB in children: miliary TB, TB meningitis, diffuse lymphadenopathy
Common EPTB in adults: lymph node TB, pleural effusion, pericarditis, TB meningitis, miliary TB
IRIS is a distinct TB presentation in patients starting antiretroviral therapy

Differential diagnosis for pulmonary tuberculosis in HIV-infected persons

Table extracted from the guideline

Diseases	Notes
Other pneumonia (bacterial, viral, atypical)	Bacterial pneumonia (most often S. pneumoniae, H. influenzae) is common at all stages of HIV infection. Atypical pneumonia (M. pneumoniae, C. pneumoniae) and viral pneumonia are possible at any CD4 count, except in the case of cytomegalovirus, which occurs at CD4 < 50.
Pneumocystosis (Pneumocystis jirovecii pneumonia or PCP or PJP)	PCP has many characteristics in common with PTB (insidious onset, persistent cough, fever) but tends to occur in the advanced stages of HIV infection (CD4 < 200). PCP is unlikely in patients taking co-trimoxazole prophylaxis. It imparts a greater degree of dyspnoea, rarely produces effusions, and is not usually accompanied by haemoptysis.
Pulmonary Kaposi's sarcoma (KS)	KS can resemble PTB, with slow onset of cough, fever, haemoptysis, night sweats and weight loss. It is a disease of advanced stage HIV, and in most cases, is preceded or accompanied by lesions involving the skin and mucous membranes.
Less common diseases	Pulmonary cryptococcosis, histoplasmosis and other fungal infections. Pulmonary nocardiosis.

Source: Médecins Sans Frontières, Clinical presentation of tuberculosis in HIV-infected persons — MSF Tuberculosis. Reproduced in summary form.

From the guideline

Verbatim

“As the immune system deteriorates in later stages of the disease, smear-negative PTB, disseminated TB and EPTB become more common.”

— Médecins Sans Frontières, Clinical presentation of tuberculosis in HIV-infected persons — MSF Tuberculosis, Section 2.4 (2026)

Editor’s perspective

Why this matters for Georgia and the region

Prof. Giorgi Pkhakadze, MD, MPH, PhD

Editor-in-Chief, Georgian Medical Journal · Chair, Public Health Institute of Georgia · WHO consultant, health and migration

As Editor-in-Chief of the Georgian Medical Journal and WHO consultant, I recognise the critical importance of this MSF guidance for Georgia, where TB-HIV co-infection remains a persistent challenge despite progress in both disease programmes. The CD4 thresholds for differential diagnosis—PCP at CD4 <200, cytomegalovirus at CD4 <50—are actionable clinical markers that Georgian physicians can use immediately in resource-limited settings where molecular diagnostics may not be universally available. I would emphasise to Caucasus clinicians the need for heightened clinical suspicion in advanced HIV disease, as smear-negative and extrapulmonary TB are frequently missed without systematic application of diagnostic algorithms. The implementation caveat is ensuring reliable access to co-trimoxazole prophylaxis and advanced sputum collection techniques across primary and secondary care facilities, not just in specialised TB or HIV centres.

ORCID 0000-0001-7609-4515 · Perspective written for the GMJ Guidelines Library, 21 Oct 2026

Applicability

Georgia and the South Caucasus

Georgia and the South Caucasus region face dual TB-HIV burdens, with TB remaining a significant public health challenge and HIV prevalence concentrated in key populations. This guidance is directly applicable to Georgian clinicians managing co-infected patients, particularly as the country strengthens integrated TB-HIV services. National programmes should ensure availability of co-trimoxazole prophylaxis, advanced sputum collection techniques, and diagnostic algorithms that account for atypical presentations in immunocompromised patients. The differential diagnosis framework is essential for settings where access to rapid molecular diagnostics may be limited and clinical acumen remains paramount. Eastern European countries with similar epidemiological profiles and health system capacities will find this MSF guidance practical for frontline clinical decision-making.

Questions this guideline answers

Quick answers

How does TB presentation differ in early versus advanced HIV infection?

In early HIV infection with relatively normal immune function, TB presents similarly to HIV-negative individuals. As immunosuppression advances, smear-negative PTB, disseminated TB and EPTB become more common, are harder to diagnose, and have higher fatality rates.

What CD4 count thresholds indicate risk for specific opportunistic infections?

PCP typically occurs at CD4 <200, whilst cytomegalovirus pneumonia occurs at CD4 <50. PCP is unlikely in patients taking co-trimoxazole prophylaxis.

How can I distinguish PCP from PTB in an HIV-infected patient?

PCP shares insidious onset, persistent cough and fever with PTB but causes greater dyspnoea, rarely produces effusions, and is not usually accompanied by haemoptysis. PCP occurs at CD4 <200 and is unlikely with co-trimoxazole prophylaxis.

What are the most common forms of EPTB in HIV-infected adults?

The most common EPTB in HIV-infected adults are lymph node TB, pleural effusion, pericarditis, TB meningitis and miliary TB. In children, miliary TB, TB meningitis and diffuse lymphadenopathy are most common.

Related on GMJ

Interconnected resources

Dictionary of Public Health

Conditions A–Z

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Same guideline

Disseminated or miliary tuberculosis — MSF TuberculosisChapter 2: Clinical presentation
Extrapulmonary tuberculosis — MSF TuberculosisChapter 2: Clinical presentation
Pulmonary tuberculosis — MSF TuberculosisChapter 2: Clinical presentation

Clinical presentation of tuberculosis in HIV-infected persons — MSF Tuberculosis

What this guideline says

Key points

Differential diagnosis for pulmonary tuberculosis in HIV-infected persons

From the guideline