Vertical transmission of multidrug-resistant Q151M human immunodeficiency virus type 1 strains.

We report the first case of mother-to-child transmission of human immunodeficiency virus type 1 strains harboring multiple mutations including the Q151M multinucleoside reverse transcriptase inhibitor resistance mutation. Sustained virologic success was obtained in the infant with postnatal antiretroviral therapy optimized according to genotypic drug resistance testing and therapeutic drug monitoring.

Severe Toxoplasma gondii I/III recombinant-genotype encephalitis in a human immunodeficiency virus patient.

The reactivation of an uncommon type I/III recombinant-genotype Toxoplasma gondii strain resulted in unusually severe encephalitis and chorioretinitis associated with a cerebral salt wasting syndrome in an African human immunodeficiency virus patient. This observation suggests an influence of the parasite genotype on disease expression in immunocompromised patients.

Murine model of infection by Tropheryma whipplei.

We developed an animal model reproducing several aspects of Whipple's disease. Immunocompetent mice were persistently infected with Tropheryma whipplei, its etiological agent, and developed liver granulomas. SCID mice were infected similarly but did not develop tissue lesions.