1. And what about Viruses?? Are viruses LIVING or NONLIVING?
SUPPORT YOUR ANSWER

2. What is a VIRUS? The word “virus” means…POISON “particles” …not cells
Contain DNA (or RNA)
Protective protein coat: CAPSID

3. Are they alive?? LIVING CHARACTERISTICS NON LIVING CHARACTERISTICS
Organized: head, tail, nucleic acid
Contain DNA or RNA
contain a PROTEIN coat
Adapt (protein coat for protection; can mutate)
Viruses can reproduce (make more of itself…BUT…
Need HOST organism to make more viral parts & function at all
Replicate rather than reproduce
Don’t grow
Don’t develop
Don’t respond (antibiotics nor other drugs don’t work on viruses

4. STRUCTURE OF VIRUSES
ANIMAL VIRUSES
BACTERIAL
VIRUSES
PLANT VIRUSES

5. VIRAL DISEASES ANIMAL PLANT Influenza (flu) Common cold Mumps measles
Chicken pox
Rabies
HIV
Ebola
Shingles
Tobacco mosaic
Alfalfa mosaic
Lettuce mosaic
Potato X
Tomato bushy stunt
Citrus psoriasis
Grapevine fanleaf

6. Viral Infection LYTIC VIRUS LYSOGENIC VIRUS
enter host cell…begin making parts immediately (flu or mumps virus)
Enter host cell; but remains inactive for period of time (HIV, herpes viruses)
VACCINE….weakened form of the virus …injected into a
Person to stimulate an immune response

7. Human Warts tumors or growths of the skin \
caused by infection with Human Papillomavirus (HPV).
common in childhood and are spread by direct contact or autoinocculation.
No vaccine
Many warts disappear on their own

8. Common cold Runny or stuffy nose Itchy or sore throat Cough Congestion
Slight body aches or a mild headache
Sneezing
Watery eyes
Low-grade fever
Mild fatigue
No vaccine
Too many cold viruses

9. INFLUENZA Fever chills Cough Sore throat Runny or stuffy nose
Muscle or body aches
Headaches
Fatigue (tiredness)
Sometimes: vomiting and diarrhea
There is a vaccine

10. smallpox Fever Overall discomfort Headache Severe fatigue
Severe back pain
Sometimes vomiting, diarrhea or both
Few days later…a red rash
Some forms were highly fatal in past
There is a vaccine

11. rabies There is a vaccine…generally given in 5 doses over 28 days
Anxiety, stress, and tension
Drooling
Convulsions
Exaggerated sensation at the bite site
Excitability
Loss of feeling in an area of the body
Loss of muscle function
Low-grade fever
Muscle spasms
Numbness and tingling
Pain at the site of the bite
Restlessness
Swallowing difficulty
There is a vaccine…generally given in 5 doses over 28 days

12. bronchitis
Cough
Wheezing
Shortness of breath
Pain
No vaccine

13. Infectious mononucleosis
Fever
Fatigue
Sore throat
Headache
Swollen lymph nodes
Loss of appetite
No vaccine

14. LAUNCH…