Causes of disease

Across

• 1. Any microorganism that causes disease, most commonly bacteria and viruses, but may also include fungi (8)
• 4. Fibrous protein that is the main constituent of connective tissues such as tendons, cartilage and bone (8)
• 5. A condition with a specific cause in which part or all of an organism is made to function in an abnormal or less efficient manner (7)
• 6. General term for a single-celled organism that is too small to be seen without a microscope (13)
• 8. When a pathogen is tranferred from one individual to another (12)
• 9. Study of the incidence and pattern of a disease with a view to finding ways of preventing and controlling it (12)