There are no good or bad cockroaches. Every cockroach is the same, and its job is to spread filth across the home and especially the kitchen area and spread diseases. If no one fell sick in your home, then you have a perfect immune system, but this does not mean you will never get affected by these cockroaches. It is essential for you to treat your house with Cockroach pest control and get rid of the disease spreading cockroaches as soon as possible.