I don't think "original sin" as meant by Orange had the same connotations that it did after Trent. Orange specifically refutes the Pelagian notion that Adam's sin does not effect his ancestors. Pelagius said that we commit sin by example from Adam. The Church Fathers consistently refuted that, calling Adam's sin the first sin and one we inherit as being part of our human nature. St. Augustine quotes numerous Fathers when discussing how Adam's sin affects us today.
Original sin, in the West, has additional meanings that Scholasticism discovered. But this was after Orange. I don't think that the East would have refuted the canons of Orange. And if I am not mistaken, one of the later Ecumenical Councils verified what was hammered out at Orange, but I'd have to double check that (if you want).
Regards
The "original sin" at the Council of Orange was probably understood in Augustinian terms. The Orthodox teaching is not in line with that.
The concept of inherited "guilt" as opposed to "damage" is a very different mindset that prevailed in the theology of the East and the West from Augstine onward.
To the Orthodox, our mortality is a consequence of the original sin which is transmitted to succeeding generations by our fallen nature. We suffer death on account of Adam. We have not broken the law by inheritiy mortality from our ancestral parents, so there is no guilt and if there is no guilt there is no need to "pay back" anything.
Sin is willful disobedience to God. Obviosuly, infants do not sin. So, there is nothing to "wash off."
"I don't think "original sin" as meant by Orange had the same connotations that it did after Trent. Orange specifically refutes the Pelagian notion that Adam's sin does not effect his ancestors. Pelagius said that we commit sin by example from Adam. The Church Fathers consistently refuted that, calling Adam's sin the first sin and one we inherit as being part of our human nature. St. Augustine quotes numerous Fathers when discussing how Adam's sin affects us today."
I have no idea what the Council of Orange meant by "original sin", but I can tell you that none of the Eastern Fathers, save perhaps in speculation (and I don't know of any of that)said that we inherit "Adam's sin" as part of our nature. Certainly the Fathers recognize it, call it "ancestral sin" and recognize its effect on human nature, but they don't say we inherited the sin; that would be you guys and your Augustinian notion.