Lung

Bacterial infection: Streptococcus pneumoniae, and other common bacteria.

Mycobacterial infection: M. tuberculosis, M. avium-intracellulare and other mycobacterial species.

Fungal infection: Pneumocystis carinii pneumonia Cryptococcus neoformans, Histoplasma capsulatum, Coccidioides immitis, Aspergillus species, Penicillium marnefii.

Viral infection: Cytomegalovirus.

Non-infectious disorders: Non-Hodgkin’s lymphoma, Kaposi’s sarcoma, lymphoid interstitial pneumonitis (LIP), non-specific interstitial pneumonitis (NIP).

Central nervous system

Protozoal infection: Toxoplasma gondii

Mycobacterial infection: M. tuberculosis

Fungal infection: Cryptococcus neoformans, Candida species.

Viral infection: Cytomegalovirus, herpes simplex virus, varicella zoster virus, JC virus (progressive multifocal leukoencephalopathy)

Non infectious disorders: Primary CNS lymphoma, Kaposi’s sarcoma.

Eye

Protozoal infection: Toxoplasma gondii

Fungal infection: Candida species

Viral infection: Cytomegalovirus, varicella zoster virus

Non infectious disorders: Primary CNS lymphoma, Kaposi’s sarcoma

Gastro-intestinal Tract

Bacterial infection: Shigella, and Salmonella species.

Protozoal infection: Cryptosporidium species, Giardia lamblia, Isospora belli, Entamoeba histolytica, Microsporidium species.

Mycobacterial infection: M. avium complex

Fungal infection: Candida species

Viral infection: Cytomegalovirus, herpes simplex virus.

Non infectious disorders: Kaposi’s sarcoma, lymphoma.

Skin and mucus membranes

Bacterial infection: Staphylococcus aureus, Streptococcal species

Mycobacterial disease: M. tuberculosis

Fungal infection: oral and oesophageal candidiasis, penicillinosis, Cryptococcus neoformans. Histoplasma capsulatum

Viral infection: Herpes simplex and zoster virus, Cytomegalovirus

Non infectious disorders: Kaposi’s sarcoma, drug-induced eruptions

Infestations: Scabies