Viruses Video and Transcript by Matthew Dougherty, MS, and Wah Chiu, PhD National Center for Macromolecular Imaging, Baylor College of Medicine PowerPoint.

Slides:

Advertisements

Similar presentations

Viruses: Bacterial and Animal Types

Advertisements

Viruses The Smallest Organisms?. What are viruses? Very small particles Too small to see with a light microscope Can be “seen” with an electron microscope.

What living things do you see in this picture?.

WHAT DO THE COMMON COLD, INFLUENZA, MEASLES, & POLIO HAVE IN COMMON? 1.

Virus Structure Tutorial Shuchismita Dutta, Ph.D. RCSB PDB, 2008.

Viruses Extremely small (can only be viewed using an electron microscope) Non-cellular pathogen Core of genetic material – DNA or RNA Surrounded by.

Intimate Strangers The Infectious Agents of Disease.

VIRUSES Chapter 24 Video.

Viruses Living or Not ???????. Viruses Virus – Latin for “_Poison__” Virus – Latin for “_Poison__” TMV TMV

18.3 Viral Diseases KEY CONCEPT Some viral diseases can be prevented with vaccines.

Introduction to Viruses By Christine Herrmann, PhD Courtesy of B.V.V. Prasad BioEd Online.

Lesson 3 Reading Guide Lesson 7-3 What are Viruses?

Chapter 24 Video.  Computer Viruses?  Not in the scope of this class. They behave similarly, but are not at all related.

Viruses I can reproduce inside a living cell, yet I am dormant (inactive) outside a cell Q: Am I living or nonliving? Q: Am I a eukaryotic or prokaryotic.

What do you know about Viruses? 1. What are the 5 most common viral infections? 2. Name 2 similarities between a virus and a bacteria? 3. Name 2 differences.

What do the following have in common?.

Viruses. Virus Introduction A virus is a sub- microscopic infectious agent only capable of reproducing within a host cell. Virus is Latin for toxin or.

Lesson 3 Viruses. Virus Tiny “organism” that is parasitic to cells Composed of two main parts: Protein outer shell called capsid Genetic material inside.

Diversity of Living Things

VIRUSES Nature’s Robots

Viruses “They Are Not Alive!”.

Chapter 19 VIRUSES AND SIMPLE INFECTIOUS AGENTS. 1) 1892, use porcelain filter to filterize tobacco leaves extrat  filterable agent 2) 1898, Martinus.

Lesson 7-3 What are Viruses?

Viruses A virus is a NON-Living particle made of DNA or RNA and a protein coat. Look at table 25-1 on p. 487 in text book. VERY small. ~ 0.001micron.

CHAPTER 19 NOTES VIRUSES CHARACTERISTICS OF VIRUSES Prokaryotic or Eukaryotic: Neither (no organelles or membranes) Unicellular or Multicellular: Neither.

Viruses At the Threshold of Life 6. The Nature of Viruses Not really alive Not really completely inert Existence somewhere between living objects and.

Viruses Coach Blocker Schley County Middle School Ellaville, Georgia.

Viruses Living or Not ???????. Characteristics of Viruses Among the smallest biological particles that are capable of causing diseases in living organisms.

Plate 31 Introduction to Viruses. Smallpox Chickenpox Influenza (“the flu”) Herpes Polio Rabies Ebola Human Papillomavirus (HPV) Human Immunodeficiency.

Chapter 18.2 Viruses and Prions “Viruses and prions are smaller and less complex than bacteria; they invade cells and can alter cellular functions.”

VIRUSES CHAPTER 18 Part 1. Characteristics non-living particlesnon-living particles invade living cellsinvade living cells pathogenic - named after the.

IN: ► Discuss the following two questions with your group. What is a virus? (Come up with a definition.) Are viruses alive? (Be prepared to defend your.

Viruses Living or Not ???????. Viruses Virus – Latin for “_Poison__” Virus – Latin for “_Poison__” Russian Biologist Dmitri Ivanovski (1892) – Tobacco.

Viruses Viruses are very small Anatomy of a Virus.

What is a virus?  small infectious agent that can replicate only inside the cells of other organisms. Viruses are too small to be seen directly with.

Intimate Strangers The Infectious Agents of Disease.

Viruses Ebola Influenza Rabies HIV West Nile Virus.

Nonliving infectious agent that can cause disease. *Not in a kingdom

Add how bacteria make you sick (toxins) Add how virus makes you sick Add vaccines.

Structure, Function, and Reproduction

Viruses Ebola Influenza Rabies HIV West Nile Virus.

Viruses. What are viruses? They are not living things. Viruses are considered non-living because they do not use energy to grow or to respond to their.

Viruses. Viruses are not a type of bacteria! Virus comes from the Latin word for poison. Viruses are so small they can only be seen with Electron Microscope.

Viruses. Tiny 1/2 to 1/100 the size of smallest bacterium Nonliving Do not fulfill the criteria for life Do not carry out respiration, grow or move Can.

The Infectious Agents of Disease

Viruses…. Are they alive?

copyright cmassengale

Characteristics of Viruses

The Genetics of Viruses

Viruses Rotavirus (causes stomach flu) HIV virus.

VIRUS. Discovery : He contributed in the discovery of first virus from Tobacco mosaic virus. Ivanovsky reported in 1892 that extracts from infected leaves.

Viruses & Bacteria 1.

VIRUSES CHAPTER 18 Part 1.

VIRUSES CHAPTER 18 Part 1.

Chapter 18.2 Viruses and Prions

Unit 2: Organisms and Evolution Advanced Higher Biology Miss Aitken

Presentation transcript:

Viruses Video and Transcript by Matthew Dougherty, MS, and Wah Chiu, PhD National Center for Macromolecular Imaging, Baylor College of Medicine PowerPoint Slides and Notes by Sonia Rahmati Clayton, PhD, and Colleen Krockenberger, BS Baylor College of Medicine The National Center for Macromolecular Imaging is funded by the National Center for Research Resources, National Institutes of Health BioEd Online

What are viruses? Viruses are major microscopic disease causing agents. Depend on host to reproduce (parasites) By understanding mechanisms of virus action, it is possible to control or minimize negative effects of viruses CALICI BioEd Online

Virus—Etymology “Virus” is the Latin word for poisonous slime or ooze. Today also used to describe computer programs that “infect” and interfere with software functions. Different names are associated with virus in different settings: Vector: viral genome that is engineered to serve as a tool to replicate and express genes. Virion: the complete infectious virus particle NORWALK BioEd Online

Viruses—Size Smallest living entity capable of reproduction (within a host cell) Discovered in the 1890’s Can be seen with an electron microscope RICE DWARF BioEd Online

Viruses—Size BioEd Online Here is how you can imagine the size of viruses: If a virus was the size of a basketball: A bacterium would be as large as a city block A grain of sand would be two miles long A person would be 4,000 miles tall

Viruses—History Invasions, wars, and immigrations can introduce viral diseases to different populations Some viral infections have had major global effects: Influenza type A is believed to be responsible for global flu outbreaks in 1918, 1957 and th century Spanish explorers brought small pox, measles and influenza viruses to the New World P22 BioEd Online

Viruses—Structural Biology The key to the success in the battle against viruses is understanding different viral mechanisms. Scientists study : Viral structure Viral life cycle Mechanisms of cell infection Viral replication Host cellular proteins needed by the virus (used as antiviral targets) SINDBIS BioEd Online

Viruses—In Medicine Vaccines against viruses enhance the immune response of the host Immune cells are exposed to viral proteins or deactivated virus Immune system creates specific memories Immune system is enhanced and “ready” to defend against the virus Scientists are investigating methods that use viruses for treatment of diseases such as cancer and Alzheimer's disease. ROTA BioEd Online SINDBIS

Viruses—Examples O’Nyong-Nyong Hepatitis Rabies Polio HIV Rota Sindbis Norwalk Calici Lassa Dengue Marburg Yellow-Fever Rubella Mumps Measles Hantaan Epstein-Barr Cowpox Influenza Ebola OMSK Junin Duvenhage Oropouche ORF Coxsackie Chikungunya Bunyamwera Herpes BioEd Online

Virus—Human Herpes Shape: Electron microscope images reveal an Icosahedral pattern (20 faces of equilateral triangles) Genetic information: double-stranded DNA Infection: Can persist in the host and be reactivated Eight of the known herpes viruses infect humans Icosahedron 20 Triangles BioEd Online

Viruses—Disease Viral infections generally behave in two ways: Viruses reproduce and cause disease immediately (active or lytic). Viruses integrate into the host cell (dormant or latent). BioEd Online