The word that is an example of Schlosser's use of transitions in Fast Food Nation is "however".
Explanation:
The word "however" can be used as a transition word like many others when this is collocated between two simple sentences to create a compound one, generating precisely the effect of transition. In this sentence from "Fast Food Nation", "however" connects "Salmonella has been almost entirely eliminated from Swedish and Dutch eggs" and "...more than half a million people become ill after eating eggs...", here however is used as a transition word that also expresses contrast.
