communicable disease

• pathogens are microorganisms that cause infectious disease. May be a virus, bacteria, protist, fungi
• disease caused by viruses, bacteria, protists or fungi are spread by direct contact, water or air
• disease can be prevented by vaccination, avoiding contact with infected animals, and keeping good hygiene
• bacteria and viruses reproduce rapidly inside the body
• bacteria produce toxins that damage tissues
• viruses live and reproduce inside cells, making them hard to treat
• Measels- viral disease showing symptoms of fever and a rash. Spread by inhaling droplets from coughs and sneezes
• HIV- viral disease that unless treated attacks the body's immune system
• malaria-caused by a protists, causes fever and can be fatal
• tobacco mosaic- virus that effects many plants and leaves the plant with discolouration. Affects the growth of plants
• salmonella- bacteria that causes food poisoning, spread by eating contaminated food. causes vomiting, cramps ect
• gonorrhoea- bacteria. symptoms include green discharge from vagina or penis. Spread by sexual contact
• rose black sport- fungal disease that causes black spots on leaves and stems. Spread by water, wind or contaminated tools.