Relationship between vitamin D deficiency and visually evoked potentials in multiple sclerosis.

Objective: To evaluate the possible relationship between serum 25-OH vitamin D levels and visually evoked potentials (VEP) in patients with multiple sclerosis (MS), residents in the south zone of Gran Canaria.

Material And Methods: The study included 49 patients with MS, on whom 25-OH-vitamin D was determined, along with VEP, and a neurological examination to determine incapacity. Clinical variables, such as a history of optic neuritis were recorded.

Novel type-II material system for laser applications in the near-infrared regime.

The design and experimental realization of a type-II "W"-multiple quantum well heterostructure for emission in the λ > 1.2 m range is presented. The experimental photoluminescence spectra for different excitation intensities are analyzed using microscopic quantum theory.

[Mycobacteriosis caused by Mycobacterium gordonae. First case reported in Cuba].

Since 1990, repeated samples of a positive HIV patient were studied, who had skin lesions with ulcers and scabs, dirty bottom and prominent edges; hyperergic Mantoux and very low CD levels. As a result, a slowly growing pigmented strain was isolated and classified as Mycobacterium gordonae by using standard as well as alternative bacteriological studies such as the mycobacterial mycolic acid analysis. The patient was treated with 4 antibacilar drugs and 6 weeks after the starting of the treatment, all reported skin lesions had disappeared.