[Photosensitivity as presenting sign of HIV infection. Control with triple antiretroviral therapy].

Background: We report a case of photosensitivity which occurred as the presenting sign of HIV infection. Photosensitivity regressed completely after introducing antiretroviral tritherapy.

Case Report: A 44-year-old woman developed a photo-distributed eczematous eruption which did not respond to topical steroids or hydroxychloroquine.

Perianal striated muscle hamartoma associated with hemangioma.

Striated muscle hamartoma is a rare entity which was described only recently. It is a congenital malformation characterized by the presence of striated, mature muscle fibers in the reticular dermis and hypodermis. We describe a striated muscle hamartoma of the perianal region in a female infant associated with an hemangioma in the same area that regressed completely.

[Porphyria cutanea tarda and hepatitis C virus infection. Clinical and virological study].

Introduction: The role of hepatitis C virus (HCV) infection in porphyria cutanea tarda (PCT) is probable since the global antibody prevalence among PCT patients is about 70 p. 100. The purpose of this study was to evaluate the virological characteristics in 12 patients with sporadic PCT and one with familial PCT.

Panton-Valentine leucocidin and gamma-hemolysin from Staphylococcus aureus ATCC 49775 are encoded by distinct genetic loci and have different biological activities.

Staphylococcus aureus ATCC 49775 produces three proteins recognized by affinity-purified antibodies against the S component of Panton-Valentine leucocidin (LukS-PV) and two proteins recognized by affinity-purified antibodies against the F component of this toxin (LukF-PV). Purification of these proteins and cloning of the corresponding genes provided evidence for the presence of two loci. The first one, encoding Panton-Valentine leucocidin, consisted of two cotranscribed open reading frames, lukS-PV and lukF-PV, coding the class S and the class F components, respectively.