Page 1: Communicable Diseases and Pathogens
This page introduces the concept of communicable diseases and the various types of pathogens that cause them. It covers viral, bacterial, fungal, and protist diseases, as well as methods of pathogen transmission.
Definition: Pathogens are microorganisms that enter the body and cause communicable (infectious) diseases in plants and animals.
The page details specific diseases caused by different pathogens:
Viral Diseases:
- Measles: Spread through droplets, causing rashes and fever
- HIV: Transmitted through bodily fluids, attacking the immune system
- Tobacco mosaic virus: Affects plants, discoloring leaves
Bacterial Diseases:
- Salmonella: Causes food poisoning with symptoms like fever and stomach cramps
- Gonorrhoea: A sexually transmitted infection with symptoms including pain when urinating
Highlight: Bacteria produce toxins that make you feel ill by damaging cells and tissues, while viruses replicate inside cells before bursting out to release new viruses.
Fungal and Protist Diseases:
- Rose black spot: A fungal disease affecting plant leaves
- Malaria: A protist disease transmitted by mosquitoes
The page also outlines methods to prevent the spread of pathogens, including hygiene practices, vector control, isolation, and vaccination.
Vocabulary: Vectors are organisms that transmit pathogens between hosts.