A newborn demonstrates petechiae, ecchymosis, and mucosal bleeding. The preferred blood component for this infant would be:

In the scenario described, the newborn is exhibiting symptoms such as petechiae, ecchymosis, and mucosal bleeding, which are indicative of a bleeding disorder likely related to a deficiency in platelet function or count. Given these symptoms, the preferred blood component would be platelets.

Platelets play a crucial role in hemostasis and the prevention of bleeding. When a patient presents with signs of bleeding related to platelet dysfunction or thrombocytopenia (low platelet levels), administering a platelet transfusion is the appropriate course of action. This is especially important in neonates, as their ability to produce platelets can be compromised, and they may also have higher risks for bleeding due to fragile blood vessels or other underlying conditions.

Fresh frozen plasma contains clotting factors but would not directly improve the platelet count or function, which is the primary concern in this case. Red blood cells are used primarily for anemia and would not address the bleeding symptoms resulting from low platelet count. Cryoprecipitated AHF primarily provides fibrinogen and some clotting factors but does not compensate for low platelet levels.

Thus, in the context of the newborn's presentation, administering platelets is vital to effectively manage the bleeding risk and to help restore hemostasis.