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

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

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

STRUCTURE OF VIRUSES ANIMAL VIRUSES BACTERIAL VIRUSES PLANT VIRUSES

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

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

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

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

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

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

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

bronchitis Cough Wheezing Shortness of breath Pain No vaccine

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

LAUNCH…