Agents of Disease
Fungus
▪ One-celled
or
____________
organisms
Fungus
▪ One-celled or multi-cellular organisms
Infectious Disease:
Infectious Disease: disease that can be spread from one generation to the next
Bacteria can be found ....
▪ Water and Soil
▪ All surfaces people touch daily
If the situation is serious enough it may cause health officials to
___________________________ an individual
If the situation is serious enough it may cause health officials to
QUARANTINE an individual
Which pathogen, by being the smallest, is able to spread and infect the
greatest number of hosts?
viruses
Most parasites ___________________________ kill their host
Most parasites DO NOT kill their host!
Pandemic:
Pandemic: A rapidly spreading outbreak of disease affecting widespread regions across the
world (ex: smallpox, TB, certain flu outbreaks)
▪ They make sure that food, water, and medicines are safe
▪ Scientists develop and test new medicines
Public Health
Zika is another example
▪ Caused by a virus that is
________________ by mosquitoes.
Zika is another example
▪ Caused by a virus that is
CARRIED and TRANSFERRED by mosquitoes.
7.Malaria is a common disease in many countries. What is the cause of this disease?
Malaria is a common disease in many countries. What is the cause of
this disease?
A parasite
▪ An organism that lives on or in another organism and benefits at the other
organism’s expense.
Parasite
▪ An organism that lives on or in another organism and benefits at the other
organism’s expense.
Epidemic:
Epidemic: a rapidly spreading outbreak of disease affecting many large populations (ex.
Typhoid fever)
Many diseases caused by bacteria have been brought under control through the use of...
Many diseases caused by bacteria have been brought under control through the use of ANTIBIOTICS.
o Cattle are affected by a disease called _____________________________ disease
o Can be costly to farmers
o Epidemics can _____________________
food supplies.
o Cattle are affected by a disease called HOOF-AND-MOUTH Disease.
o Can be costly to farmers
o Epidemics can REDUCE food supplies
26. Many school districts are placing dispensers of hand sanitizer in classrooms and computer
labs. Which of the following is the MOST likely purpose of this practice?
A. conserve water resources
B. control noninfectious diseases
C. promote safe use of technology
D. limit diseases spread by contact
Many school districts are placing dispensers of hand sanitizer in classrooms and computer
labs. Which of the following is the MOST likely purpose of this practice?
D. limit diseases spread by contact
This is because bacteria and pathogens can __________________________________________
over time which means they can alter or change their genetic make-up so that modern medicines no longer work on them.
MUTATE
Pandemic:
Pandemic:A rapidly spreading outbreak of disease affecting widespread regions across the
world (ex: smallpox, TB, certain flu outbreaks)
Good hygiene is
▪Washing Hands Frequently
▪ Bath regularly
▪ Cover your mouth when you cough
• Avoid contact with hands
Vaccines can also prevent pathogens
▪ A weakened __________________________ form of the pathogen
Vaccines can also prevent pathogens
▪ A weakened OR DEAD form of the pathogen
Leprosy is caused by the bacterium Mycobacterium leprae. In ancient times, it spread throughout China, Egypt, India, and Western Europe.
Which best describes the spread of this bacterium?
A. The bacterium caused a pandemic.
B. The bacterium infected people quickly.
C. The bacterium caused a local epidemic infection.
D. The bacterium caused mild infection, only sporadically.
Leprosy is caused by the bacterium Mycobacterium leprae. In ancient
times, it spread throughout China, Egypt, India, and Western Europe.
Which best describes the spread of this bacterium?
A. The bacterium caused a pandemic.
Common Fungi example that can be located on the
▪ Neck, scalp, groin or feet
RINGWORM
VECTOR:
Something capable of spreading disease without being infected itself
(rats, mosquitoes, soil, parasites)
Stopping them can be very difficult
Pandemic and Epidemic
▪ Diseases that can be passed from one organism to another and cause
___________________ in all parts of the world
▪ Diseases that can be passed from one organism to another and cause
OUTBREAKS in all parts of the world
A city has an outbreak of a disease that affects an unusually large portion of its population
at the same time.
Which term BEST describes the outbreak?
An epidemic