Bacteria, Viruses, & Other Agents of Disease

Slides:

Advertisements

Similar presentations

+ Viruses and Prions. + What is a virus? DNA enclosed in a protein shell They are not alive Need cells to survive.

Advertisements

Life At Risk: Infectious Disease Chapter 18. Virus Noncellular infectious agent Consists of protein wrapped around a nucleic-acid core Cannot reproduce.

Unit 5: Classification and Kingdoms

Communicable (Infectious) Disease. Any agent that causes disease –Viruses –Fungi –Protozoans –Bacteria –Parasites Pathogens.

What makes us sick?… …pathogens make us sick  An organism or substance that causes disease  Contains an antigen- substance that triggers an immune.

LO: SWBAT understand and explain how our body comes under attack. DN: List some ways in which you can get sick. What causes you to be sick? HW: Article.

Viruses, Bacteria & Diseases

+ Viruses and Prions. + What is a virus? DNA enclosed in a protein shell They are not alive Need cells to survive.

Viruses “They Are Not Alive!”.

Viruses. Nonliving particle – do not contain all characteristics of life Reproduce by infecting cells Made of 2 things Nucleic acid Capsid – protein coat.

Viruses. Virus – non-cellular particle made up of genetic material and protein. Reproduce only by infecting living cells. –Viruses share some, but not.

Virus? Warts are a skin virus! Characteristics of Protist No Nucleus Ring of DNA Asexual Reproduction.

Viruses Are they alive ?. What is a Virus? A non – living, infectious particle made only of a strand of DNA or RNA surrounded by a protein coat. This.

Infectious Disease Biology pgs Objectives Identify the causes of disease. Explain how infectious diseases are transmitted Describe how antibiotics.

Chapter 47 Section 3 pp HIV AND AIDS. VACCINES  Vaccines artificially produce acquired immunity  Vaccine- substance that contains antigen.

Viruses Doesn’t belong to any kingdom -It’s not a plant or an animal.

Doesn’t belong to any kingdom -It’s not a plant or an animal. -It’s not a fungi, protist, or bacteria. WHAT IS A VIRUS?

COMMUNICABLE DISEASES Communicable Disease- a disease that is spread from one living thing to another through the environment. Pathogen – an organism that.

Viruses. 1.What is a virus? 2. nonliving 2. they have an outer layer called a capsid 2. they contain DNA or RNA 3. never both.

Viruses!. What is a virus? A non-living particle composed of a protein coat (capsid) & nucleic acids The virus can have either DNA or RNA (retrovirus)

Bacteria Bacteria are one-celled prokaryotes, some of which can cause a disease. Most bacteria reproduce by simply dividing into two. Antibiotics are drugs.

Viruses. Virus: Segments of nucleic acid (DNA OR RNA) within a protein coat (noncellular); NONLIVING; much smaller then prokaryotes Must reproduce within.

Effects of Microorganisms ASA lesson 5. Helpful microbes Some act as decomposers – an organism that gets energy by breaking down and feeding on the wasted.

Viruses Ch General Characteristics 1/100 the size of bacteria 1/100 the size of bacteria –Only seen with electron microscope Non-living Non-living.

VIRUSES ARE THEY ALIVE OR NOT??? STRUCTURE OF A BACTERIOPHAGE (A VIRUS THAT INFECTS BACTERIA) HEAD PROTEIN COAT GENETIC MATERIAL TAIL NECK BODY TAIL.

Viruses, Viroids, Prions So you thought infectious bacteria were bad?

Immune System Part 1: Infectious Disease

Important Types of Germs 4.2: Characteristics of Germs

Pathogens & Disease.

LO: SWBAT understand and explain how our body comes under attack.

INFECTIOUS DISEASE.

Immunity and Infection

VIRUSES DEFINITION – nonliving infectious particle that lives in a host cell. A. HISTORY 1. DISCOVERY – tobacco mosaic virus 2. SIZE - animation 3.

Viruses Doesn’t belong to any kingdom -It’s not a plant or an animal.

Aim: How does our body come under attack?.

Health & Disease.

Disease Transmission The method of how a disease is spread through a population Epidemic: A disease that suddenly increases in occurrence above the normal.

Pathogens and Disease.

Virus: Microlife Infectious Diseases

KEY CONCEPT Infections can be caused in several ways.

Adenovirus - cause of the common cold

Kingdom for virus???? (Do they even have a kingdom?)

How do your cells fight off invaders?

KEY CONCEPT Germs cause many diseases in humans.

KEY CONCEPT Infections can be caused in several ways.

Important Types of Germs 4.2: Characteristics of Germs

KEY CONCEPT Infections can be caused in several ways.

THE IMMUNE SYSTEM.

Unit 3 Infectious Disease.

Ch. 18 Viruses and Bacteria

Unit 3 Infectious Disease.

Virus Characteristics

Viruses Living or Not ???????.

Infectious Disease Notes

Wednesday Jan 29, 2014 Take out your note packet from last week and open to the “VIRUS” section.

KEY CONCEPT Infections can be caused in several ways.

Notes M - pg.544 KEY CONCEPT Infections can be caused in several ways.

The student is expected to: 4C compare the structures of viruses to cells, describe viral reproduction, and describe the role of viruses in causing diseases.

KEY CONCEPT Infections can be caused in several ways.

Viruses Viruses – are segments of nucleic acids

KEY CONCEPT Infections can be caused in several ways.

Presentation transcript:

Bacteria, Viruses, & Other Agents of Disease

Disease Transmission Airborne Vector-borne Oral transmission Droplet contact Indirect contact Direct contact

Pathogens Bacteria Viruses Protists Fungus Worms Prions Ex: Tuberculosis, staph infection Viruses Ex: HIV, small pox, herpes Protists Ex: Malaria, sleeping sickness Fungus Ex: Candidiasis (yeast infection), valley fever Worms Tapeworm, hookworm Prions CJD, Mad cow

Antibiotics Antibiotic resistance Only work on bacteria – not viruses!

Viruses Not alive! DNA or RNA wrapped in protein coat Reproduce by hijacking cells Viral DNA is inserted into host DNA Host cell produces virus proteins Virus self-assembles and attacks new cells

HIV HIV infects & destroys Helper T cells (CD4 cells) Disease is tracked by T cell count <200/µl is considered AIDS Test for HIV using ELISA