Download Infectious Disease - Sonoma Valley High School

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Plasmodium falciparum wikipedia, lookup

Cross-species transmission wikipedia, lookup

Middle East respiratory syndrome wikipedia, lookup

Ebola virus disease wikipedia, lookup

Herpes simplex virus wikipedia, lookup

Chagas disease wikipedia, lookup

Lyme disease wikipedia, lookup

Onchocerciasis wikipedia, lookup

West Nile fever wikipedia, lookup

Rocky Mountain spotted fever wikipedia, lookup

Sexually transmitted infection wikipedia, lookup

Chickenpox wikipedia, lookup

Marburg virus disease wikipedia, lookup

Schistosomiasis wikipedia, lookup

Visceral leishmaniasis wikipedia, lookup

Eradication of infectious diseases wikipedia, lookup

Neglected tropical diseases wikipedia, lookup

Leptospirosis wikipedia, lookup

African trypanosomiasis wikipedia, lookup

Pandemic wikipedia, lookup

Syndemic wikipedia, lookup

Infectious Disease
Organs of the immune system
Why do you get sick?
• 3 causes of disease:
– 1. agents (pathogens)
– 2. environment: cigarette smoke
– 3. inherited genes: hemophilia, sickle cell anemia
Germ theory of disease
• L. Pasteur and R.
Koch( 1850s)
• Germ theory:
diseases are
caused by
called germs
Louis Pasteur
• Pathogen will always be
found in the sick, not in
the healthy
• It must be isolated and
grown as a culture
• If placed in a new host,
they will become infected
• The pathogen taken from
the 2nd host will be
identical to the original
Lyme disease
• Isolated in 1975 in
Lyme, Conn.
• Symptoms: rash,
joint inflammation
• The disease is
caused by a
bacteria, the vector
is a deer tick.
Vector: animal that carries
pathogens from person to person
Disease pathogens
• Viruses: tiny particles
(not living) that invade
cells. Takes over the
cell’s functions
Virus: influenza
• Bacteria: cause
disease by releasing
toxins or by breaking
down tissues for food
Bacteria: E coli
• Protists
• Spread by water or
vectors. Causes
Protist: plasmodium (malaria)
• Worms
• Flatworms and
roundworms can be
parasites, causing
Flatworm: sleeping sickness
• Infects skin, causing
athlete’s foot and
Fungus: athlete’s foot
How diseases are spread
• Physical contact:
touching an infected
surface, then touching
your mouth, nose, or
eyes, or inhaling airborne
• Contaminated food and
water : salmonella, E coli
• Infected animals:
mosquitoes (vectors)
carry West Nile virus,
Mosquitoes can inject diseases
when they bite
Fighting infectious diseases
• Antibiotics: kill
bacterial infections
• Few viral medicines
• OTC medicines:
relieve the symptoms,
not a cure
• Your immune system
becomes activated
and launches an
immune response.
Today’s topic was……………
I already knew about………….
I just learned that……………..
I’m interested in……………..