Nannizziopsis Immune Reconstitution Inflammatory Syndrome in a Patient with HIV: First Reported Case

We describe the case of a 35-year-old HIV-positive male of African origin diagnosed with neurotoxoplasmosis and a Nannizziopsis spp. cavitating pulmonary lesion unmasking immune reconstitution inflammatory syndrome (IRIS). The patient presented with headache, left hemiparesis and confusion. MRI of the brain showed two space-occupying lesions in the right basal ganglia and left parietal lobe typical for neurotoxoplasmosis. The patient tested positive for HIV and had advanced CD4 lymphopenia. After commencement of antiretroviral treatment, a CT scan of the chest showed a cavitating lesion in the right upper lobe. The diagnosis of Nannizziopsis spp. fungal infection was confirmed by DNA sequencing on a bronchial wash sample. The patient achieved complete recovery with antiretroviral therapy, standard neurotoxoplasmosis treatment and antifungal treatment with voriconazole for 12 weeks.

AIDS patients at risk of multiple concomitant opportunistic infections present a significant diagnostic challenge.Unusual pathologies should also be considered in addition to the most common opportunistic pathogens, especially in the context of immune reconstitution inflammatory syndrome.