Final answer:
Shell eggs should be rejected if received at temperatures higher than 45°F (7°C) to minimize the risk of bacterial growth and foodborne illness.
Step-by-step explanation:
Shell eggs should be rejected if they are received at an air temperature higher than 45°F (7°C). This recommendation is made because bacteria generally multiply most rapidly at temperatures between about 4 and 60 degrees C (40 and 140 degrees F), and having eggs at temperatures above 45°F can increase the risk of bacterial growth and foodborne illness. It is important to maintain proper temperature control for perishable foods to ensure safety.