Adult fleas are easy enough to see, but it’s the eggs that are the most worrisome. Fleas will typically infest an animal, domesticated or wild, outside and then make their way in. When inside, they can infest any other warm-blooded organism in the house, including humans.
Prevention techniques include regular bathing of pets and pet bedding, and regular pest control inspections.
There are several indications of a flea infestation. Pet scratching is the obvious one. Another is bite marks. They look like mosquito bites, but often appear in clusters or lines and can remain inflamed for weeks. Feces, or “flea dirt” looks like coarse black pepper is usually found on pets or in pet bedding. Flea eggs are also an indication but are harder to see.
One flea can cause an epidemic, so a pest control service is necessary to be thorough enough to eliminate the problem.