Generally, PiCV generally causes atrophy of the bursa of Fabricus and the thymus, which leads to immunosuppression and weakened immune system in the affected pigeons.
PiCV generally causes atrophy of the bursa of Fabricus. This is generally. PiCV generally causes atrophy of the bursa of the thymus. This is generally. PiCV weakened immune system in the affected pigeons. This was generally. The thymus leads to immunosuppression.