OSHA recognizes these categories of occupational injury or illness:

• Injury: Examples are back strain, bone breaks, and head injury.

• Skin diseases or disorders: Examples are eczema, oil acne, chrome ulcers, and chemical burns.

• Respiratory conditions: Examples are pneumonitis, pharyngitis, rhinitis, acute congestion due to chemicals, dusts, and gases or fumes.

• Poisoning (systemic effects of toxic materials): Examples are poisoning by lead, mercury, cadmium, arsenic or other metals; by carbon monoxide, hydrogen sulfide or other gases; by benzol, carbon tetrachloride or other organic solvents; by insecticide sprays; by other chemicals such as formaldehyde, plastics, and resins.

• All other illnesses: Examples are anthrax, brucellosis, infectious hepatitis, malignant and benign tumors, food poisoning, and histoplasmosis.