(See How Catalytic Converters Work for more details.). Controlling the engine is the most processor-intensive job on your car, and the engine control unit (ECU) is the most powerful computer on most cars.
â¢ Accidental poisoning is one of the leading causes of GI ulcer disease. This can be from plants (for example, toxic mushrooms, castor beans, or sago palm), pesticide or rodenticide toxicity, chemical poisoning (often with ethylene glycol or phenol), or heavy metal poisoning involving zinc, iron, or arsenic.
Corneal ulcer. A corneal ulcer is usually due to a bacteria or virus causing a painful, red eye. The corneal ulcer may feel like something is in the eye irritating it and there may be increased sensitivity to light.People who get a lot of cold sores often develop corneal ulcers. Bacterial infections cause corneal ulcers and are common in people who wear contact lenses. 2  Viral infections are also possible causes of corneal ulcers. 3  Such viruses include the herpes simplex virus (the virus that causes cold sores) or the varicella zoster virus (the virus that causes chickenpox and shingles).