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Today’s Agenda: (1) Journal Questions: a. What is a virus?

b. Give an example of a common virus.(2) Lecture II: Disease Transmission

(Saliva) & Your Immune System “Types of Viruses.” (slide 16) -Next topic: Bacteria/Monera -Following topic: The Immune SystemNext Exam covers circulatory system,

saliva, viruses, bacteria, and your immune system

Saliva & Disease Transmission

Disease Transmission

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Disease Transmission

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Disease Transmission

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Disease Transmission

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Who Gives a Spit?A. If your dog cuts or injures their

paw, they will most likely go off into a corner, lie down and lick the wound.

B. So it must be healing for you to do the same when you get a cut, right?

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C. Think about it: Dogs drink from toilet bowls and lick various anatomical parts, so that doesn’t make it a good idea for humans to lick their wounds.

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D. Some people think it’s helpful to lick their wounds because they’ve heard that saliva is sterile, or a disinfectant.

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E. The Contents of your Saliva:

(1) More than 600 types of bacteria

(2) 98% Water

(3) The other 2% is

[1] Mucous (secretions from nose)

[2] Enzymes

[3] Electrolytes (sodium, potassium)

[4] Antibacterial Compounds

[5] Opiorphin (Recently discovered

in mice (2011)

[6) Viruses and Fungi

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F. You have 3 Salivary Glands:

(1) Parotid Gland

(2) Sublingual Gland

(3) Submandibular Gland

G. You produce saliva 24 hours a day.

-They secrete or ooze 2-4 pints of spit a day!

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H. What is saliva used for?

(1) Moistens Food

(2) Digest Starches

(3) Keeps membranes moist (prevents them from drying out)

(4) Assists taste buds

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I. What diseases are transmitted in saliva?

(1) Common cold (bacterial)

(2) Flu (viral)

(3) Upper Respiratory Infection

(4) Meningitis

(5) Mononucleosis (Mono)

(6) Hepatitis B

(7) Cold Sores

(8) Molluscum contagiosum

(9) And much, much more…..

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I. What diseases are transmitted in saliva?

-As of today (3/9/11) the Centers of Disease Control have over 2,500 search hits on saliva transmitted diseases.

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J. Ways that you can transmit your spit/saliva and possibly infect others:

(1) Coughing

(2) Sneezing

(3) Spitting

(4) Direct Contact

K. Always use proper hygiene and appropriate sanitary protocols so as not to infect others around you. FREQUENTLY WASH YOUR HANDS!!!!

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L. Consequently, it would not be wise for you to lick your wounds.

M. Human bite wounds have a high risk of infection unless treated with antibiotics.

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