Complex sentence: Infected bees can be found walking in circles, as well as losing the ability to stand, disorientation is likely caused by mechanical interference or by pressure of the growing larvae on the internal organs and nervous system.
Split into simpler sentences: Infected bees can be found walking in circles, as well as losing the ability to stand. Disorientation is likely caused by mechanical interference or by pressure of the growing larvae on the internal organs and nervous system.