1.3 recall the term ‘pathogen’ and know that pathogens may be fungi, bacteria, protoctists or viruses

1.3 •pathogens are organisms which cause disease. They include some fungi, protoctists, bacteria and viruses

      •protoctist: plasmodium, which causes malaria

      •bacterium: pneumococcus, which cases pneumonia

      •viruses: influenza virus and HIV, which cause the flu and AIDS