Although it is quite easy to catch scabies, the actual rash is not contagious. The rash caused by the mite occurs when the body develops allergic reactions to the scabies mites, the mites' feces, secretions, eggs and larvae. The mite is the only contagious aspect in the transmission of scabies. Scabies mites rapidly reproduce when passed on to a person and infest their host with results ending in scabies rash symptoms. You will see these symptoms in about 3 to 6 weeks of the transmission of the mites to their new host.