“GENETIC OUTSOURCING is not to be confused with simplification in parasite downsizing. In many cases, access to the host genome, or simply parking of its own genetic burden can be seen as a type of genetic expansion strategy. Streamlining with greater efficiency and greater plasticitymay be a better term than simplification.”
http://onlinelibrary.wiley.com/doi/10.1002/bies.201300037/full