What are the conditions required for the spread of infection?

What are the conditions required for the spread of infection?

Three things are necessary for an infection to occur: Source: Places where infectious agents (germs) live (e.g., sinks, surfaces, human skin) Susceptible Person with a way for germs to enter the body. Transmission: a way germs are moved to the susceptible persont.

What is considered communicable disease?

Communicable diseases, also known as infectious diseases or transmissible diseases, are illnesses that result from the infection, presence and growth of pathogenic (capable of causing disease) biologic agents in an individual human or other animal host.

What is infectious disease list three ways to prevent the spread of infectious disease?

Prevent the spread of infectious disease

• Immunise against infectious diseases.
• Wash and dry your hands regularly and well.
• Stay at home if you are sick.
• Cover coughs and sneezes.
• Clean surfaces regularly.
• Ventilate your home.
• Prepare food safely.
• Practise safe sex.

What are 5 common types of infectious diseases?

The 5 Most Common Infectious Diseases

• Hepatitis B. According to current statistics, hepatitis B is the most common infectious disease in the world, affecting some 2 billion people — that’s more than one-quarter of the world’s population.
• Malaria.
• Hepatitis C.
• Dengue.
• Tuberculosis.

What are the 4 types of infectious diseases?

There are different types of pathogens, but we’re going to focus on the four most common types: viruses, bacteria, fungi, and parasites.

What are the top 5 common viral infections?

Most Common Infectious Diseases in the U.S.

• 1 / 15. Chlamydia. This sexually transmitted disease affects men and women.
• 2 / 15. Influenza A and B.
• 3 / 15. Staph.
• 4 / 15. E.
• 5 / 15. Herpes Simplex 1.
• 6 / 15. Herpes Simplex 2.
• 7 / 15. Shigellosis.
• 8 / 15. Syphilis.

Which of the following is an example of a persistent viral infection in humans?

Varicella-zoster virus, measles virus, HIV-1, and human cytomegalovirus are examples of viruses that cause typical persistent infections. A chronic infection is a type of persistent infection that is eventually cleared, while latent or slow infections last the life of the host.

How do you fight a viral infection?

For most viral infections, treatments can only help with symptoms while you wait for your immune system to fight off the virus. Antibiotics do not work for viral infections. There are antiviral medicines to treat some viral infections. Vaccines can help prevent you from getting many viral diseases.

How can you tell the difference between a viral and bacterial infection on a CBC?

A simple and very informative test is the white blood cell “differential”, which is run as part of a Complete Blood Count. The white blood cell “differential” will usually tell you whether you have a bacterial infection or a viral infection.

How do you tell if you have a viral or bacterial infection?

Diagnosis of Bacterial and Viral Infections But your doctor may be able to determine the cause by listening to your medical history and doing a physical exam. If necessary, they also can order a blood or urine test to help confirm a diagnosis, or a “culture test” of tissue to identify bacteria or viruses.

Can blood test show viral or bacterial infection?

A simple blood test in development could accurately identify which patients need antibiotics, Stanford researchers say.

Does a virus affect white blood cell count?

When you get sick, your body makes more white blood cells to fight the bacteria, viruses, or other foreign substances causing your illness. This increases your white blood count. Other diseases can cause your body to make fewer white blood cells than you need. This lowers your white blood count.

What viral infections cause low white blood cell count?

Viral infections: Acute viral infections, such as colds and influenza may lead to temporary leukopenia. In the short term, a viral infection may disrupt the production of white blood cells in a person’s bone marrow. Blood cell and bone marrow conditions: These can lead to leukopenia.

What is a dangerously low white blood cell count?

The definition of low white blood cell count varies from one medical practice to another. In general, for adults a count lower than 4,000 white blood cells per microliter of blood is considered a low white blood cell count.

What is an alarming WBC count?

In general, for adults a count of more than 11,000 white blood cells (leukocytes) in a microliter of blood is considered a high white blood cell count.