There are several types of roaches like German (small brown), American (large brown) and Oriental (black). German Cockroaches are the most common problem that we have in this area of Massachusetts. Restaurants and apartment buildings are the most susceptible. Cockroaches can cause severe allergy problems, and transmit disease through their saliva and fecal matter. Don’t be fooled by small brown roaches outdoors however, those are wood roaches and can easily be mistaken for german cockroaches. Wood roaches are outdoor pests and cannot survive indoors.