Pathogens and Communicable Diseases

Describe the complex relationship between overall health and the presence of disease.
Differentiate between various types of diseases, specifically distinguishing communicable diseases from non-communicable diseases.
Explain the mechanisms by which communicable diseases, caused by viruses, bacteria, protists, and fungi, are transmitted among animals and plants.
Describe the features of common human infections and how they spread, including Salmonella (bacterial), influenza (viral), malaria (protist) and Athlete's foot (fungal), as well as sexually transmitted infections such as HIV/AIDS (viral).
Describe the features and effects of three common plant diseases: ash dieback (fungal), crown gall disease (bacterial) and tobacco mosaic virus (viral).

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