Disease

1
Disease

• Viruses

2
Vocabulary

• Disease
• Disease is an illness that interferes with an
  organisms ability to function normally.
• Disease can be caused by prokaryotes, viruses,
  fungi, protists, worms, insects, and dietary
  deficiencies
• Diseases are spread through droplet infection,
  unprotected sex, poor hygiene, undercooked food,
  water, by animals such as mosquitoes and ticks
  etc.

3
Vocabulary

• Pathogen disease causing agent for infectious
  diseases
• Host organism infected with the pathogen
• Antibodies proteins produced by host to
  destroy/ kill pathogens.
• Immunity -ability of host to cope with/fight off
  pathogen
• Antibiotics substances that kill or inhibit thr
  growth of microorganisms. They are not effective
  against viral infections.

4
Vaccines Fight Viruses

• Vaccines prevent disease. The host gets a
  weakened or dead pathogen so that the body makes
  antibodies against it without getting sick.
• Vaccines were discovered by an English doctor
  Edward Jenner in 1796.He developed a vaccine for
  small pox.

5

• Ex. pathogen flu virus
• Host human body
• Vaccine flu shot
•    we dont get the same flu twice because the
  antibodies remember it, therefore we are
  immune/resistant to that strain of flu virus

6
What are Viruses?

• Viruses are strands of hereditary material
  surrounded by a protein coat
• They are considered non-living
• They can be pathogenic
• Viruses also can contribute to society as they
  are a tool used by biologists to help cure
  diseases in gene therapy
• Host Specific
• Viruses are very clever and can mutate easily,
  also they are masters of disguise

7
Viral Structure

• Viruses have a protein shell that encloses its
  hereditary material called a capsid.
• Viruses may have tails and tail fibers

8
Viral Reproduction

• Viruses that infect bacteria are called
  Bacteriophages.
• Viruses can have a
• A Lytic Life style
• or
• (2) A Lysogenic Life style

9
Viral Multiplication/Lifecycle
10
Gene Therapy

• Gene therapy involves these basic steps
• Doing research to find the gene involved in the
  genetic disorder.
• Cutting out the normal gene enzymes are used to
  do this.
• Making many copies of the gene.
• Putting copies of the normal gene into a virus
  (The viral DNA has been removed).
• The virus delivers the normal gene into the cells
  of the person with the genetic disorder.

11
11 Body/Organs Systems

• SLIC MEN R RED
• S skeletal R -
  respiratory
• L lymphatic/Immune R - reproductive
• I integumentary (skin) E - excretory
• C circulatory D - digestive
• M muscular
• E endocrine (hormones)
• N - nervous

12
Filial Worm
13
Tape Worms
14
Fungal Disease
15
Dietary Diseases

• Scurvy is a disease caused by vitamin C deficiency

16
Viral Disease