A 35-year-old man believes he is the only person alive suffering from a rare, toxic black fungus that's been growing on his brain for the past four years.Tyson Bottenus, of Providence, said he picked up the tropical fungus in 2018 while embarking on a backpacking trip in Costa Rica to celebrate his recent engagement to fiancé Liza.Their otherwise-pleasant adventure in the Nicoya Peninsula was hampered when Bottenus took a spill and scraped his elbow while cycling along the region's dusty roads. He cleaned the wound and later visited a local hospital, where it was again sterilized.
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