"Virus" PPT download

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"Virus" PPT download

Part One: Microorganisms

More than 99% of the organisms on earth are invisible to the naked eye. These organisms form a crowded and chaotic world of microorganisms...

Small life forms are called microorganisms.

Viruses Bacteria Fungi Protozoa

Viruses are the smallest organisms with living characteristics.

Smallpox, measles, mumps,

polio,

influenza,

viral hepatitis,

rabies,

Japanese encephalitis and other common viral diseases threaten human health.

Part 2: Introduction to various viruses

Rabies

Symptoms: low fever, headache, irritability

Main transmission channels:

Bitten by an animal (rabies)

Precaution:

1. Control the source of infection

2. Wound treatment

3. Vaccination

poliovirus

Symptoms: fever, upper respiratory tract inflammation, headache, limb pain and paralysis, also known as "polio".

Main route of transmission: patients

Preventive Measures: Oral Vaccine

Part Three: Virus Analysis

1. Structure and morphology of viruses

The smallest body shape and the simplest structure.

Proteins are generally wrapped around the outside of the virus, and nucleic acids are inside the virus.

2. Characteristics of virus life activities

Viruses can be chemically purified into a crystalline state. The crystallized virus behaves like ordinary chemicals in a test tube, with no biological characteristics visible. However, once it enters a living cell, it becomes very active and reflects the characteristics of living things. This means that viruses can only grow and reproduce by parasitizing in the cells of other organisms.

3. Types of viruses

Viruses can be divided into three categories according to their hosts:

Animal viruses, plant viruses, bacterial viruses.

Animal viruses: such as influenza virus and hepatitis virus.

Plant viruses: such as tobacco mosaic virus and potato spindle virus.

Bacterial viruses: such as Escherichia coli phage and Shigella dysenteriae phage.

Part 4: Summary

Viruses are simple organisms without cellular structure. Viruses can only carry out life activities by parasitizing in the cells of other organisms. Plants, animals, and bacteria can all be parasitized by viruses. Depending on the host, viruses can be divided into three categories: animal viruses, plant viruses and bacterial viruses.

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"Virus" PPT courseware download:

Download the first part of the "Virus" PPT courseware: The common viral disease mumps (epidemic parotitis, mumps) is an acute respiratory infectious disease caused by the mumps virus invading the parotid gland. It is a common respiratory infectious disease among children and adolescents, and adults. .

"Virus" PPT:

"Virus" PPT A virus is a biological entity whose genome is a nucleic acid molecule (DNA or RNA) that can use the cell's synthetic system to replicate in living cells and synthesize special particles that can transfer the viral genome to other cells. The discovery of viruses in Egypt in the 18th century...

"Virus" PPT courseware 7:

"Virus" PPT Courseware 7 Learning Objectives 1. Describe the main characteristics of viruses. 2. Use information to understand the relationship between viruses and humans. 3. Pay attention to virus-related diseases and agree that the use of viruses can benefit mankind. Duxue P89-92: 1. Who discovered the virus? Virus..

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Update Time: 2024-06-19

This template belongs to science courseware Qingdao Edition Fifth Grade Science Volume 1 industry PPT template

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