Cockroaches live in well-concealed places, and move in habitats where they may become contaminated with various pathogenic organisms:
salmonellosis, tuberculosis, dysentery, bubonic plague, rabies, gastro-enteritis, typhoid, poliomyelitis, etc.
Don't take my word for it - try searching in Google for Rabies Cockroaches - you learn something new everyday!
You are wrong. That was the only source which stated that rabies can be transmitted from roaches - and this very credible source is a marketing tool for a company selling - anti-roach products.
Try to check out links which end at .gov or .edu. I did, but I lost my original post due to computer breakdown, however it stated that cockroaches have not been associated with large-scale disease outbreaks. Moreover, if roaches carried rabies, then you would have the govt pest fighting unit out, every time a roach dropping was spotted.