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• Anyone want to guess what this is??

• Closer in….

This is a group of about 5 bacteria gathered together

Bacteria on the tipof a pin

Bacteria is composed of microorganisms that are common and live almost anywhere.

There are moreBacteria in your mouth

than there are people onplanet Earth.

“Imagine how much

bacteria exist in snot!”

Label as Bacteria

Prokaryotic (No nucleus) and no internal organelles.

Infectious Diseases Unit Link

• Human Cell

• Human Cell Frog Cell

Similar in composition.

• Human Cell

• Human Cell Bacteria Cell

Eukaryotic – Nucleus and membrane bound organelles.

• Human Cell Bacteria Cell

Eukaryotic – Nucleus and membrane bound organelles.

Prokaryotic Cell – Nucleoid, DNA free floats in cytoplasm,

Which cell has a nucleus (Eukaryotic), and which is a bacteria (Prokaryotic).

Cell with nucleus Cell without nucleusEukaryotic

Cell with nucleus Cell without nucleusEukaryotic Prokaryotic (Bacteria)

DNA is in a ring not a nucleus

• Which is prokaryotic?

Types of Bacteria

Note: Not everytype of bacteria will

be addressed.

Types of BacteriaSphere (Round) Shaped: Cocci

Rod shaped: Bacilli

• Practice before Quiz Wiz. – Which bacteria is the arrow pointing to?

• Answer: Cocci

• Answer: Spirilli

• Answer: Bacilli

• Answers to the Quiz 1-10.

New Area of Focus: Bacteria and your health.

Important Note:This portion of the unit will begin discussing the negatives of bacteria / food borne illness. It’s important to know that bacteria are critical to our survival and play many important roles in the ecosystem.

• Why should you care about learning about food borne illnesses?

• Answer! 76+ million Americans contract a food borne illness each year.

• Answer! 76+ million Americans contract a food borne illness each year.– Learning about them can help you when the

picture below becomes your home for a few days.

• Answer! 76+ million Americans contract a food borne illness each year.– Learning about them can help you when the

picture below becomes your home for a few days.

• Bacterial Food Poisoning– 81 million cases a year.– 20 of the many thousands of different bacteria

actually are the culprits.– Symptoms, including diarrhea, fever, vomiting,

abdominal cramps, and dehydration. – Salmonella, E.coli.

Learn more about bacterial food poisoning at… http://digestive.niddk.nih.gov/ddiseases/pubs/bacteria/

Bacterial food borne illness can be prevented by…. - - - -

Controlling the initial number of bacteria present.

• Washing food before preparation and serving.

• This lettuce looks healthy, why should I wash it?– It only grows in a field.

• What is one thing missing from this workplace?

• Answer – A restroom to dispose of waste and to wash hands.

• Answer – A restroom to dispose of waste and to wash hands.– Some places are responsible, follow code and

provide facilities to workers. Some do not.

Bathroom

“ahhh.”

• Where in a restaurant would you expect to find the most harmful bacteria?

• Answer! Studies have found the lemon / limes have more harmful bacteria on them than even the restrooms.

• Answer! Studies have found the lemon / limes have more harmful bacteria on them than even the restrooms.– Very rarely are the lemons washed before

they end up in your drink or on your food.

What was just on thiscutting board 3 mins. ago

• Learning proper hygiene and hand washing.

• Proper hand washing techniques.

Destroying the bacteria by proper cooking.

• When the wait staff asks how you would like your meat cooked, say…

• “I would like my meat well done!”

Avoiding re-contamination. Clean cutting board immediately after

• Don’t place raw produce on cutting board and then place something else that isn’t going to be cooked.

• Don’t place raw produce on cutting board and then place something else that isn’t going to be cooked.– Don’t prepare a salad on a board that has

touched raw meat without cleaning.

• Don’t place raw produce on cutting board and then place something else that isn’t going to be cooked.– Don’t prepare a salad on a board that has

touched raw meat without cleaning

Lemon Slice?

• Lastly, Never feed infants honey.??????

• Lastly, Never feed infants honey.

• Lastly, Never feed infants honey.– Clostridium bacteria that cause infant botulism

can be found in honey. It causes a number of dangerous health effects and even death.

• Lastly, Never feed infants honey.– Clostridium bacteria that cause infant botulism

can be found in honey. It causes a number of dangerous health effects and even death.

Learn more about botulism at… http://www.cdc.gov/nczved/divisions/dfbmd/diseases/botulism/

• Activity Reading with Questions.– Bacteria and your food.

• Preventing contamination is one of the best measures to fight bacteria.

• Preventing contamination is one of the best measures to fight bacteria.– But what happens when you contract a

bacterial infection?

• Preventing contamination is one of the best measures to fight bacteria.– But what happens when you contract a

bacterial infection?

Penicillin: Antibiotic that destroys bacteria derived from penicillin mold (fungi).

• Originally noticed by Ernest Duchesne, in 1896. – Penicillin was re-discovered by bacteriologist

Alexander Fleming working at St. Mary's Hospital in London in 1928.

Caution

Enter this next section at your own risk!!!

Girly Girls you may work out of the book in the hall.

• Gangrene: A death of body tissue that usually occurs when there has been an interruption of blood supply, followed by bacterial invasion.

• Seek medical attention immediately. (Antibiotics)

• This is the treatment option when gangrene has spread.

No Anesthesia

• This is the treatment option when gangrene has spread.

Old Modern

No Anesthesia

• Don’t go swimming with an open cut or wound. – It is an entrance for bacteria into your body.

Antiseptic: Agent that kills or inhibits the growth of micro-organisms on the external surfaces of the body.

• This is what can happen if you don’t clean your teeth and allow them to rot away.

Binary Fission: The process by which a bacterium multiplies by splitting in two.

Learn more about bacterial reproduction at… http://www.scienceprofonline.com/microbiology/binary-fission-cell-division-reproduction-prokaryotes.html

• You are made of more than 65 trillion human cells.

• You are made of more than 65 trillion human cells. – Multiply that number by 10 and that’s how

many bacteria are living in your body.

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