If you realize you are near a snake, remain still sudden movements may cause the snake to strike. If the snake doesn't move away from you after a few minutes, slowly back away from it. If someone is bitten by a poisonous snake, call a doctor immediately. If bitten by a non-poisonous snake, clean the wound and watch for signs of infection. To minimize chances of finding snakes indoors, block openings where they might enter buildings.
Snakes can pass through extremely small openings and usually enter near or below ground level.
Search walls and floors for holes or crevices. Inspect the masonry of foundations, fireplaces and chimneys. Then plug or cement these openings. Plug spaces around pipes that go through outside walls. Fasten galvanized screen over drains or ventilators, or over large areas of loose construction.