One of the places to pick up bedbugs these days in film theatres, dogs go through each week to find bedbugs.
Bedbugs may come from filth but they are carried by people who are not filthy but who do things like put their purse down in a theatre
Bedbugs may come from filth but they are carried by people who are not filthy but who do things like put their purse down in a theatre
Dogs (trained) are the most effective means to find infestation.