Download Mr. B: Health 2 Chapter 23 Lesson 4 Today`s Objectives: Describe 2

Mr. B: Health 2
Today’s Objectives:
• Describe 2 different ways that emerging infections can spread.
• Explain the difference between an epidemic and a pandemic.
Chapter 23 Lesson 4
Lesson 4: Emerging Diseases and Pandemics
Big Idea: Today, _________________ diseases have the potential to ________________ quickly throughout the
world.
Emerging Infections

Main Idea: Some diseases are becoming more ____________________ and ________________________.
o __________________ and modern ________________________ have saved millions of lives, but
communicable diseases continue to be the ___________________ cause of deaths worldwide.

Health experts label some communicable diseases as ____________________ infections.
o Def: Communicable diseases whose ___________________ in humans has increased within the past
two decades or __________________ to increase in the near future

______________________ now believe that some diseases once thought to be ________________________
may, in fact, be caused by __________________________ pathogens.

Such diseases include ________________________, diabetes, and ____________________ artery disease.

Factors Contribute to the Spread of Emerging Infections
o _____________________ across ______________________
o _____________________ movement
o Resistance to ________________________
o Changes in food _______________________
o Agents of _______________________

Avian Influenza
o Avian ________________ is passed to humans if there is ____________________ contact with
infected _____________________ or contaminated surfaces.
o Because there is no vaccine and no __________________, and because humans have little or no
______________________ to the virus, health authorities are watching this disease very carefully.

West Nile Virus
o ___________________ sometimes feed on birds carrying the West Nile virus. When infected
mosquitoes bite ___________________, they often ___________________ the virus.
o The best ___________________ measure is to protect yourself from mosquito bites.

Salmonella and E. coli
o Salmonella and E. coli are ________________ that sometimes live in animals’
____________________ tracts.
Mr. B: Health 2
Chapter 23 Lesson 4
o If people come in ___________________ with these bacteria by ___________________ contaminated
food produced by these animals, they may become _______________.

Recreational Water Illnesses
o When water is ________________________ by harmful strains of bacteria such as E. coli or by giardia,
you run the risk of getting a _____________________ water illness, or RWI.

Def: A microorganism that infects the ______________________ system
o ________________________ is a fun way to stay fit, but it can pose a risk of getting an RWI.

Other Emerging Infections
o Other emerging infections with _______________ health concerns include:

_____________________ has become a global health threat.

_________________ Disease is transmitted to humans through tick bites

Severe __________________ respiratory syndrome (SARS) is a viral illness.

Mad __________________ disease affects the brain functions of cattle.
o An epidemic can be of local or global proportions.

Def: A disease ________________ that affects many people in the _________________ place
and at the same time
How Diseases Affect the World

Main Idea: Diseases can spread with amazing ___________________.
o The world’s countries are connected through ____________________ and travel, making it easy for
infectious diseases to travel ____________________ and farther than ever before.
o When an epidemic is of global proportions, it becomes a ________________________.

Def: A global outbreak of an infectious disease
o There is always the _____________________ that an _________________ could become a pandemic.
o Health agencies plan for pandemics and develop _____________ - ___________________ strategies to
reduce their ______________________.

The Impact of Travel
o The ___________________ of people in our ____________________ world contributes to the spread
of disease.

Mutation of Pathogens
o Pathogens become drug-__________________ in a three-step process:

______________________ invade the body and cause ____________________.

______________________ attack the pathogens.

The pathogens that ____________________ the antibiotics ________________, creating a new
___________________ of drug-resistant pathogens.