Bedbugs are tiny flattened insects that feed on the blood of mammalian hosts. Although they were eradicated in the 1940s and 1950s due to improvements in sanitation and the use of pesticides, they have made a comeback in the last 10 years. The bedbug outbreak following the Sydney Olympic Games in 2000 was just the tip of the iceberg, but recent trends suggest that the bedbugs have been making a comeback thanks to global travel, denser urbanization, and an increase in the resistance to insecticides.
The answer to the question of why did bed bugs disappear is complicated by the fact that bedbugs are seasonal. During the summer months, most insects go into hibernation, which is a low-energy state where they stop developing. The hibernation period ends when the weather gets warm enough for them to resume development. This means that in the fall, bedbugs will be less active and will not be looking for food.
To prevent bedbug reinfestation, it is important to use a variety of different extermination methods. These include heat treatment and the use of household products. These can be effective methods for getting rid of bedbugs.