Epstein-Barr virus [EBV] is a virus that infects almost all humans worldwide. After the acute phase of the infection, it stays in a latent form in B lymphocytes. EBV reactivation tends to occur in immunosuppressed patients. EBV reactivation may involve the gastrointestinal tract ; it has been associated mainly with colitis, but hemorrhagic enteritis has been poorly reported. Treatment usually includes antivirals. However, our patient did not respond to conventional treatment, so interferon alpha-2a was given as a salvage treatment. To our knowledge, this is the first reported case of hemorrhagic enteritis associated to EBV reactivation treated successfully with interferon alpha-2a.

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Aims: Dengue virus is a mosquito-born viral disease that infects about 390 million people each year. The clinical manifestations are fever, arthralgia and myalgia. Guillain-Barré Syndrome (GBS) caused by dengue fever has been rarely reported. Presentation of Case: A 46-year-old man with no relevant medical history was seen because of progressive quadriparesis, dysautonomia, dysphagia and facial paresia. Ten days before seeking medical care the patient had fever, myalgia, arthralgia, rash, thrombocytopenia, and a positive NS1 dengue antigen. GBS was suspected and immunoglobulin was started while nerve conduction studies confirmed an acute motor axonal polyradiculoneuropathy. According to Brighton criteria, the patient was classified with a level 2 diagnostic certainty, since it was decided to not perform Case Study