THIS. And don't pick up anything. Make sure that you inform the housing coordinator that if one of you is not moved out of that room, those pictures will be sent to your parents (who are paying the bills) and they will be pretty upset that "the University is forcing you to live in filth". Tell the housing coordinator that you have already attempted to resolve this with the room mate, and the pictures show she is unwilling to "practice basic hygiene". You are also concerned about "rodents and insects infesting the room and building" and that this is a "health hazard".  And please let us know what happens.