Why you should care about things you can’t see
Cockroaches spread disease, according to Ron Harrison, PhD, entomologist and director of Technical Services for Orkin. However, houseflies are even worse and they can spread the Zika virus, among others illnesses. (Check out this list of the 10 most dangerous bugs to watch out for.) Mice and rats can carry the rare but deadly hantavirus, according to the Centers for Disease Control and Prevention. Watch out for these signs of infestation:
Lots of spiders
CBCK/Shutterstock The mainstay of a spider’s diet is insects; if you see spiders in your house, it’s a safe bet the house has insects in plentiful supply, according to the Panther Pest Control Team. Even if you don’t see other bugs, it means the spiders are controlling the population—just don’t expect that to last. Consider yourself warned, and either call an exterminator and follow these tips to bug-proof your house.