Does a blood spot mean an egg is contaminated?
No, You can’t see bacteria with the naked eye. Blood or meat spots are occasionally found on an egg yolk and are merely an error on the part of the hen. They’re caused by the rupture of a blood vessel on the yolk surface when it’s being formed or by similar accident in the wall of the oviduct. Both chemically and nutritionally eggs with blood spots are fit to eat. You can remove the spot with the tip of a knife, if you wish. At Sparks we candle our eggs, candling is the process of passing them over a very bright light, which allows you to see through the egg. The person in the candling booth may pick out any abnormalities, although it is impossible to get them all, occasionally a blood egg will get through. Sparks also has installed an electronic spotter to scan the eggs and pick out the blood spots.