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Download Place Invaders: Disease Travels
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Transcript
Disease Travels Also known as Contagious Disease Communicable Disease Transmissible Disease Caused by a pathogen that carries disease Not all infections cause disease that can be transmitted Travel enables the agents of infectious diseases to become Invasive Species No resistance in new population Cause epidemics or pandemics Often move from animals living in close quarters with humans to humans Diseases also target plants and animals Travel of humans as they emigrated to new continents Trade across land masses Trade between land masses Bridged natural barriers that prevented invasive species including diseases and enabled them to propagate and spread Devastated human populations in the Middle Ages Bacterial Infection Swollen Lymph Nodes http://upload.wikimedia.org/wikipedia/commons/d/d3/Blackdeath2.gif Spread not only to humans Plant diseases Animal diseases Mammals Birds Reptiles Insects and amphibians Potatoes As early as 500 B.C. the Inca were raising “batatas” and “papas” 1565 Spanish took them back to Spain from Peru Spain Peru England Spain 1565 Peru Italy Ireland England 1585 Spain 1565 Peru Italy Recorded human pandemic influenza (early sub-types inferred) H2N2 H2N2 H1N1 H1N1 H3N8 1895 1905 1889 Russian influenza H2N2 1915 Pandemic H1N1 H3N2 1925 1900 Old Hong Kong influenza H3N8 1955 1918 Spanish influenza H1N1 1965 1957 Asian influenza H2N2 1975 1985 H9* H5 H7 Reproduced and adapted (2009) with permission of Dr Masato Tashiro, Director, Center for Influenza Virus Research, National Institute of Infectious Diseases (NIID), Japan. 1965 25 1975 1980 1985 2005 2010 2009 Pandemic influenza H1N1 1968 Hong Kong influenza H3N2 Recorded new avian influenzas 1955 1995 1999 1997 2003 1996 1995 2002 2005 Animated slide: Press space bar 2015 Virus Horseshoe Bats People Civet Cat Also Known as Swine Flu Photo Courtesy of CDC Mysterious Disappearance of worker bees A combination of factors Varroa Mite A Fungal Infection Nosema apis A newly discovered virus – Invertebrate Iridescent Virus Impact Honey and Pollination 80% fruits and vegetables
