31.1 pathogens and human illness 1. hypothesize what you think this organism is doing in the...

31.1 Pathogens and Human Illness

1. Hypothesize what you think this organism is doing in the picture. (BONUS: ID this guy)

2. Hypothesize why you do not get sick EVERYTIME disease causing germs invade your body.

White blood cell

E. Coli (bacteria)

Pg. 68

31.1 Pathogens and Human IllnessSet up Cornell Notes on pg.69

•Topic: 31.1 Pathogens and Human Illness

•Essential Question(s):

1.Give REAL LIFE examples of how pathogens enter the body

– Direct Contact– Indirect Contact

2.1 Atoms, Ions, and Molecules


KEY CONCEPTGerms cause many diseases in humans


KEY CONCEPTGerms cause many diseases in humans.


• Diseases caused by germs, such as the E. Coli bacteria can be fatal (death)

• 1330-1352, the bacteria that caused the “Black Death” or the Plague originated from fleas on rats

– Killed approx.

100-200 MILLION

people

– New diseases- HIV- SARS- Avian Flu (bird flu)- Swine Flu


• Germ theory proposed that microorganisms cause diseases.– led to rapid advances in understanding disease– Can be infectious (polio, flu), caused by germs– or noninfectious (cancer, heart disease), caused by

genes or lifestyle


• Disease-causing agents are called pathogens.• What would happen if pathogens were eliminated?

– We wouldn’t get sick


Pathogens

Bacteria Viruses Fungi Protozoa Parasites

Pg. 68


Whiteboard Knowledge

• For each type of pathogen, write any words/pictures/info/examples you know


Whiteboard Knowledge

• Grab a White board/Pen/Eraser for yourself• Grab a Poster and a few markers for your TABLE


• Bacteria – are single-celled

organisms.– cause illness by destroying

cells – release toxic chemicals– Can be treated/killed

with antibiotics or antiseptics

– Exs: – E. Coli– Salmonella

- “Food Poisoning”


Viruses

– Take over a healthy (host) cell – Forces cells to produce more of the virus – Smaller than bacteria– Can be prevented with vaccines

– Exs:– HIV

– Influenza

– Herpes– *Common Cold– AIDS

• are disease-causing strands of DNA or RNA that are surrounded by a protein coat


Fungi

– can be multicellular or single-celled. – take nutrients from host’s cells– occur in warm and damp places

Ex: Athlete’s foot, yeast, mold


Protozoa– are single-celled organisms– Prey on other cells– use host cells to complete their life cycles– take nutrients from host cell

– Ex: Malaria, dysentery


• Parasites– are multicellular organisms – grow and feed on a host – possibly kill the hostEx: Heart worm Round worm Elephantiasis- parasitic worms


Vectors

• Direct contact requires touching an infected individual. Includes: – kissing– sexual intercourse – hand shaking – bite

tickEx:Lime Disease- ticksMalaria- mosquitoWest Nile Virus- mosquitoRabies- rabid animalHIV- infected person

• any person or animal that carries and transmits a pathogen to another living organism.


Pathogens can enter the body in different ways.

• Direct contact require an infected person or animal to physically touch a healthy person • Ex: Rabies, HIV

• Indirect contact does not require touching an infected individual. • Ex: SARS, TB

31.1 Pathogens and Human IllnessTime for a Little Guessing Game…

• Guess the pathogen AND how the disease spreads• On the poster you have been given, draw this table• Remember: Whisper quietly as to not allow other teams to

hear your answers HINT: use the systems affected to help


HIV

13.1 Ecologists Study Relationships

Pneumonia


Tuberculosis


Malaria

HINT: The mosquito is actually the VECTOR


Hepatitis B


Measles


Influenza


• Different pathogens cause common infectious diseases.

31.1 Pathogens and Human IllnessSet up Cornell Notes on pg. 71

•Topic: 31.1 Bacteria vs. Viruses

•Essential Question(s):

1.Double-bubble map comparing and contrasting viruses and bacteria using the book, notes, videos, and REAL LIFE examples of each.

2.1 Atoms, Ions, and Molecules

31.1 Bacteria vs. Viruses


Pg. 71

VIRUSES BACTERIA

Take notes from video which will be used to add info to your Double-Bubble Map


Viruses vs. Bacteria Videos

Viruses•The Littlest Assassins•Viruses•How Viruses Work•The Influenza Pandemic of 1918

BacteriaHarmful•The Enemy Within: Bacteria•Harmful BacteriaBeneficial•Beneficial Bacteria•How Bacteria Can Help

Focus:• How viruses use our cells against us• Beneficial bacteria vs. Harmful bacteria

Pg. 71

31.2 Immune System

Classwork

On pg. 70 please draw a double-bubble map comparing and contrasting bacteria and viruses

•REAL LIFE examples

•Illustrations

•Treatment/Prevention?

(pg. 942 & notes & Videos)


Beneficial Bacteria• Decomposers

– Break down dead material

• Soil– Makes it fertile so plants can

grow

• Intestines– Aids in digestion– Produces vitamins

• Food– Cheese, sour cream, yogurt

• Medicine-

– help fight diseases

• Sewage Treatment• Oil spills

Harmful Bacteria

• Take over ponds, etc.– Kills existing life

• Food– Grows on food (spoils)

• Mouth– Feed on food in between

teeth- Must brush and floss

• Infect– Open sores

• Difficult to kill– May have a slippery outer

capsule

31.2 Immune System

Single- celled

Release toxic chemicals

Larger than viruses

E. Coli

Pathogens

microscopic

Infectious

Have a protein coat

Force cells to produce more

virus

Smaller than Bacteria

HIV

Common cold

FluBacteria Viruses

31.2 Immune System

Rabbit Island Experiment Case Study: Tuberculosis

• Quietly read the case study (highlight crucial info)• Summary of Rabbit Island Experiment (Table)

• Class discussion• Clarifying questions• You have until Friday to complete the case study

questions

• I WANT TIME and CONSIDERATION. This is going into your grade as a QUIZ/ESSAY score. – If typed, submit on Edmodo– Or on a neatly written piece of paper.

31.1 pathogens and human illness 1. hypothesize what you think this organism is doing in the...

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