"Threats from Microorganisms" PPT

Description

"Threats from Microorganisms" PPT

Part One: Classroom Thoughts

Thinking: Do you know about bird flu?

Avian influenza is the abbreviation of ‘avian influenza’. It is an infectious disease of poultry (poultry and wild birds) caused by type A avian influenza virus. Avian influenza virus infection can manifest as mild respiratory symptoms and gastrointestinal symptoms with low mortality; or it can manifest as severe systemic, hemorrhagic, and septic symptoms with high mortality. This difference in symptoms is mainly determined by the virus type of avian influenza.

Activity:

When is the incidence of influenza (or local illness caused by a virus) most common?

1. Clarify the purpose of the investigation

2. Determine the objects of investigation

3. Prepare questionnaire

4. Conduct investigations

5. Analyze the original statistical data

Threats from microorganisms PPT, part 2: thinking

1. What is a pathogen? Source of infection? Route of transmission? Susceptible people?

2. What conditions are necessary for influenza to spread?

Three links in the epidemic of influenza:

Sources of infection: People and animals that can spread pathogens

Transmission route: the path that pathogens take from the source of infection to healthy people

Susceptible groups People who are susceptible to a certain infectious disease

influenza

①Nature of influenza: acute respiratory infectious disease

②Typical symptoms: headache, throat congestion, runny nose, cough, shortness of breath, high fever, body muscle aches, etc...

③Cause of disease: Influenza virus

④Transmission route: spread through air droplets

⑤Methods of prevention

①Early diagnosis, early treatment, early isolation

② During the influenza epidemic, try to avoid going to public places as much as possible.

③Get vaccinated against influenza virus

Threats from microorganisms PPT, part three: basic clearance

1. The biggest structural difference between viruses and bacteria is that they do not have __________. Viruses cannot live independently, they can only live ____. But they can all cause disease, so they are called .

2. There are three links in the epidemic of infectious diseases: __________, __________ and __________.

3. Which of the following organisms is a source of infection ()

A. Roundworm B. Schistosoma

C. Hepatitis A virus D. Rabies dogs

4. The main route of transmission of mumps is ()

A. Fecal-oral transmission B. droplet spread

C. Transmitted through sexual contact D. mother-to-child transmission

5. Which of the following infectious diseases is not spread by droplets ()

A. Influenza B. atypical pneumonia

C. Tuberculosis D. Hepatitis A

6． The World Health Organization announced on April 16, 2003 that after the joint efforts of relevant scientific researchers around the world, it was finally officially confirmed that a variant of the coronavirus is caused by SARS ()

A. Infectious disease B. Pathogen

C. Transmission route D. susceptible

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"Threats from Microorganisms" PPT courseware:

"Threats from Microorganisms" PPT courseware Part One: Threats from Bacteria 1. Bacteria: a single-celled prokaryotic organism. 2. Harm 1. Some bacteria can invade human cells. 2. Some bacteria can produce a toxin that can damage cells. 1. Fine...

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Update Time: 2024-09-30

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 2 industry PPT template

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