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A Level Biology Revision "Communicable Diseases and Pathogens"

You can find all my A Level Biology videos fully indexed at https://www.freesciencelessons.co.uk/... In this video, we look at communicable diseases and pathogens. First I explain what is meant by a communicable disease and by a pathogen. I then look at the features of four categories of pathogens: bacteria, viruses, fungi and proctoctista (which are also called protista). Image credits: Bacterial meningitis https://commons.wikimedia.org/wiki/Fi... MBq at the German-language Wikipedia, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons HIV https://commons.wikimedia.org/wiki/Fi... Content Providers: CDC/Dr. Edwin P. Ewing, Jr., Public domain, via Wikimedia Commons Malaria https://commons.wikimedia.org/wiki/Fi... El*Falaf, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Oral Thrush https://commons.wikimedia.org/wiki/Fi... James Heilman, MD, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Athlete's foot https://commons.wikimedia.org/wiki/Fi... James Heilman, MD, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Athlete's foot fungus https://commons.wikimedia.org/wiki/Fi... Ecorahul, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons E. coli https://commons.wikimedia.org/wiki/Fi... Credit: Rocky Mountain Laboratories, NIAID, NIH, Public domain, via Wikimedia Commons Papilloma virus https://commons.wikimedia.org/wiki/Fi... Author: Unknown photographer/artistSource: Laboratory of Tumor Virus Biology, Public domain, via Wikimedia Commons Fungus on onions https://commons.wikimedia.org/wiki/Fi... Downtowngal, Public domain, via Wikimedia Commons Giardia https://commons.wikimedia.org/wiki/Fi... CDC / Janice Haney Carr, Public domain, via Wikimedia Commons Malaria sporozoites https://commons.wikimedia.org/wiki/Fi... NIAID, CC BY 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Fungus on willow https://commons.wikimedia.org/wiki/Fi... Jerzy Opioła, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons