Download - Warmup
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Warmup •Suppose a bacterial colony is 30 & they split every hour. In how many hours will it take for their population to grow to 1,920 bacteria?
•Assume that a bacterium can divide every 15 minutes. If you start with 2 cells, how many bacteria will be present in 2.5 hours
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Disease Transmission•Contagion – A disease that is spread from one organism to another
•Contagions are diseases that are contagious!
•Example: the flu is a contagion because it can spread from one person to another
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If not passed from person to person its not a contagion
Examples:•Heart disease•Depression•Cancer•Asthma
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So how are contagions spread?
•Pathogen: a microbe that causes the disease
•Carrier: An individual infected with a disease, can spread disease, even though they show NO SYMPTOMS!!!
HIV Postive? Or not?
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Vector•A smaller organism that passes the disease from one organism to another
•Fleas transmit the bubonic plague •Ticks transmit Lyme disease•Mosquitoes transmit malaria, yellow fever, West Nile Virus
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Pandemic vs. Epidemic• An epidemic is when the number of people who become infected rises well
beyond what is expected within a country or a part of a country. When the infection takes place in several countries at the same time it then starts turning into a pandemic.
• A pandemic is usually caused by a new virus strain or subtype - a virus humans either have no immunity against, or very little immunity. If immunity is low or non-existent the virus is much more likely to spread around the world if it becomes easily human transmissible.
*Put simply, a pandemic covers a much wider geographical area, often worldwide. A pandemic also infects more people than an epidemic. An epidemic is specific to one city, region or country, while a pandemic goes much further than national borders
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What if…
•Let’s say I’m MOLD X, and I’m a great bacterial killer. I’m going to be used in antibiotics!
•At first, I’m pretty effective at knocking out bacteria.
•But after awhile, bacteria adapt and become resistant to my moves.
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ANTIBIOTIC RESISTANCE in bacteria occurs when mutant bacteria survive an antibiotic treatment and give rise to a stronger, more resistant population.
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Monsters inside of me