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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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The average office desk has 400 times more bacteria on it than a toilet.