Ants cause various types of damage, depending upon the variety. Carpenter ants tunnel through wood, destroying structures. Pharaoh ants may transmit serious diseases. A fire ant’s sting is potentially deadly to susceptible individuals, and all ants contaminate the food they infest

Termites eat wood, and can consequently cause great structural damage to your home if left unchecked.

Cockroaches spread human disease by depositing disease organisms on food and utensils. The American cockroach, which comes into contact with human excrement in sewers or with pet droppings, may transmit bacteria that cause Salmonella and Shigella. German cockroaches are believed to be capable of transmitting disease-causing organisms such as Staphylococcus, hepatitis, and coliform bacteria. They also have been implicated in the spread of typhoid and dysentery. Recent studies have found a strong association between the presence of cockroaches and increases in the severity of asthma symptoms in individuals who are sensitive to cockroach allergens.

Except for poisonous spiders, such as the black widow and the brown recluse, spiders are not harmful to humans. When it’s important to eliminate spiders, chemical control is used, along with destruction of webs and eggs. Since they feed on insects, measures that eliminate unwanted insects will also reduce spider populations.

Bees and wasps are dangerous because of their painful and potentially harmful stings.

Rodents consume and contaminate food. They also gnaw on electrical wires, wooden structures, and tear insulation in walls and ceilings for nesting. Rodents can also transmit disease to humans, pets, and livestock. They have been found to transmit typhus, leptospirosis, trichinosis, and salmonellosis.