Transcript Place Invaders: Disease Travels

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