Central sulcus of the human brain. Gray's FIG. 726â Lateral surface of left cerebral hemisphere, viewed from the side. The central sulcus is a fold in the cerebral cortex of brains in vertebrates. Also called the central fissure, it was originally called the fissure of Rolando or the Rolandic fissure.
Duck plague, on the other hand, is a disease caused by the herpes virus and is one of the most highly contagious duck diseases there is. Infected birds are sluggish, have ruffled feathers and greenish-yellow diarrhea that are sometimes stained with blood.ne of the most troublesome duck diseases is fowl cholera. This disease is caused by a bacterium called Pasteurella multocida and is often associated with poor sanitation. The symptoms include diarrhea, mucous discharges and loss of appetite.
Bacterial diseases are diseases that are caused either internally or externally by bacteria. These diseases are common among aquarium fish predisposition to them include factors such as poor water quality conditions, stressful living conditions, hypoxia (when a whole body or part of a body is denied a proper supply of oxygen, temperature changes, and the handling and transport of fish.