Diseases

2. present in the body or environment
5. Are not infectious and cannot be passed from one organism to another.
8. Introducing microorganisms to a culture medium, or introducing modified microorganisms into an individual to protect them against disease.
10. Insects that penetrate the plant phloem and feed on the dissolved food. They act as pests and are also vectors that carry pathogenic viruses, bacteria, and fungi into healthy plant tissue.
11. Transmitted from an infected person to an uninfected person by unprotected sexual contact.
13. Infectious disease caused by pathogens that can be passed from one organism to another.
15. Pathogens that are much smaller than bacteria and can only reproduce inside living cells of other organisms.

1. Dead or inactive pathogenic material used in vaccination to develop immunity to a disease in a healthy person.
3. Malignant tumours that invade neighbouring tissues and other parts of body in blood where they form secondary tumours
4. Organisms that are usually single-celled and can only be seen using a microscope. They include bacteria, fungi, viruses and protists.
6. Reproduction by simple cell division, for example in bacteria.
7. Widely used solid (gel) culture medium used for growing microorganisms.
9. medium
12. Microorganisms that cause disease.
14. A change in the genetic material of an organism.