"Virus" PPT courseware download

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"Virus" PPT courseware download

Part I: Common viral diseases

Mumps (epidemic parotitis, mumps) is an acute respiratory infectious disease caused by the invasion of the parotid gland by the mumps virus. It is a common respiratory infectious disease among children and adolescents. It also occurs in adults and is caused by the mumps virus. Non-suppurative swelling and pain of the parotid gland are prominent symptoms. The virus can invade various glandular tissues or nervous system and almost all organs such as liver, kidney, heart and joints.

Hand, foot and mouth disease is an infectious disease in children, also known as exanthematous vesicular stomatitis. It mostly occurs in children under 5 years old and can cause herpes on the hands, feet, mouth and other parts of the body. A few children can cause complications such as myocarditis, pulmonary edema, and aseptic meningoencephalitis. In some severely ill children, if the condition progresses quickly, death may occur. The main clinical symptoms of the disease are herpes on the mucous membranes of the hands, feet and mouth or the formation of ulcers after ulceration. Hand, foot and mouth disease is an infectious disease caused by enteroviruses. There are more than 20 types (types) of enteroviruses that cause hand, foot and mouth disease.

Part 2: Diseases caused by viruses

influenza

Symptoms: High fever, sore throat, headache, cough

The virus that causes influenza is called influenza virus, or influenza virus for short. Influenza viruses come in either spherical or elongated shapes. They can attack humans, horses, pigs and some birds.

virus shape

The shapes of viruses include spherical, rod-shaped, tadpole-shaped, bullet-shaped, etc.

To sum it up: various forms

Part Three: Virus Classification

Viruses cannot live independently

Must be parasitic in other living cells

Therefore viruses can be divided into

1.Animal viruses

2. Plant viruses

3. Bacteria and viruses

Part 4: Common animal viruses

1. Foot-and-mouth disease virus is the causative agent of foot-and-mouth disease. This virus can cause characteristic blisters on the oral mucosa, tongue, hooves, and occasionally breasts of affected animals, which can then burst and sometimes even cause death.

2. Rabies virus can infect humans and various domestic animals. The virus invades the nervous system and reproduces, causing neurological symptoms of excitement and then paralysis. The virus is found in the nervous system and salivary glands and is transmitted through bites. Infected humans and animals generally die.

3. Swine fever virus Swine fever virus can only infect pigs, and pigs of all ages, genders and breeds can be infected. The mortality rate is very high and it is very harmful to the pig industry.

4. Newcastle disease virus, also known as Asian chicken plague. The disease is highly contagious, with a mortality rate of over 90%. Among mammals, cattle and cats have also been infected and died. People can also be infected, causing conjunctivitis, flu-like symptoms and subauricular adenitis. The virus is mainly spread through feed and drinking water, and can also infect chickens through respiratory tract or skin trauma.

Part 5: Measures to prevent viral diseases

Viruses are generally spread through the air, food, body fluids or contact. Therefore, we must develop good hygiene habits.

Strengthen physical exercise and improve resistance.

Cut off virus transmission routes

vaccination

Understand the two sides of the virus

Through study, we know that viruses bring some diseases to humans, but viruses also have merits in our lives

Beneficial aspects: For example, the vaccines we take are made from artificially processed viruses, which can prevent and treat diseases.

There are also viruses that can be used as special insecticides, etc.

People use viruses to clean up algae pollution in water surfaces

Part Six: Classroom Exercises

1. Fill it out.

① Virus is a special type of organism without cellular structure. It can cause ( ), ( ), ( ) and many other diseases, bringing adverse effects to human life and health.

② Viruses cannot survive independently and must live in other organisms ( ).

③Viruses can be divided into three categories ( ) according to the different biological cells they parasitize.

④Measures to prevent diseases caused by viruses include ( ), ( ), ( ) and other methods.

⑤ Rabies is mainly transmitted through ( ).

2. Little judge

① A virus is an organism that can survive independently. ( )

② Viruses must live in the cells of other organisms to cause harm to these organisms. ( )

③ The relationship between viruses and humans is that they have both beneficial and harmful aspects to humans. ( )

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"Virus" PPT download:

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"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: 2024-11-19

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

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