Summary of Christian Doctrine, by Louis Berkhof, pg. This includes both guilt and pollution. The guilt of Adam's sin is imputed to us. Because he sinned as our representative, we are guilty in him. Moreover, we also inherit his pollution, and now have a positive disposition toward sin.
Man is by nature totally depraved.
The Five Points of Calvinism, by Edwin H. Palmer, pg. Or, as is expressed in the Confession, 'Our first parents, being the root of all mankind, the guilt of their sin was imputed, and the same death in sin and corrupted nature were conveyed to all their posterity, descending from them by ordinary generation. I have no intention, however, to discuss all the definitions which different writers have adopted, but only to adduce the one which seems to me most accordant with truth. Original sin, then, may be defined a hereditary corruption and depravity of our nature, extending to all parts of the soul, which first makes us obnoxious to the wrath of God, and then produces in us works which in Scripture are termed works of the flesh. The Reformed Doctrine of Predestination, by Loraine Boettner, pg.