What are the 10 communicable diseases?
List of Communicable Diseases
- 2019-nCoV.
- CRE.
- Ebola.
- Enterovirus D68.
- Flu.
- Hantavirus.
- Hepatitis A.
- Hepatitis B.
What are communicable diseases Class 9?
Communicable diseases are an infectious disease, which spread from a person to person and are caused by the pathogens. Tuberculosis, typhoid, scabies, plague, skin allergies are are some examples of communicable diseases.
Which are communicable diseases?
Communicable diseases
- Influenza. Norovirus. Mumps. Tuberculosis.
- Pertussis. Zika virus. West Nile virus.
- Ebola. Chikungunya virus. Coronavirus (COVID-19)
What is communicable disease?
“Communicable disease” means an illness caused by an infectious agent or its toxins that occurs through the direct or indirect transmission of the infectious agent or its products from an infected individual or via an animal, vector or the inanimate environment to a susceptible animal or human host.
What are communicable diseases give 2 examples?
Some examples of the communicable disease include HIV, hepatitis A, B and C, measles, salmonella, measles, and blood-borne illnesses. Most common forms of spread include fecal-oral, food, sexual intercourse, insect bites, contact with contaminated fomites, droplets, or skin contact.
What is the most common communicable disease?
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.
How do viruses work in the body?
Viruses make us sick by killing cells or disrupting cell function. Our bodies often respond with fever (heat inactivates many viruses), the secretion of a chemical called interferon (which blocks viruses from reproducing), or by marshaling the immune system’s antibodies and other cells to target the invader.
Where do viruses enter the body?
In humans, viruses that cause disease like cold and flu are spread through bodily fluids, like spit or snot. The virus is so small that it leaves our bodies in these fluids, and can even float through the air in droplets from a sneeze or cough. The virus can enter the body through the eyes, nose, or mouth.
Is a virus a dead cell?
Are viruses alive or dead? Most biologists say no. Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
How do viral infections spread directly?
Some infections are spread directly when skin or mucous membrane (the thin lining of parts of the body such as nose, mouth, genitals) comes into contact with the skin or mucous membrane of an infected person. Infections may be spread indirectly when the skin comes in contact with a contaminated object.
What are the 5 modes of transmission?
The modes (means) of transmission are: Contact (direct and/or indirect), Droplet, Airborne, Vector and Common Vehicle. The portal of entry is the means by which the infectious microorganisms gains access into the new host. This can occur, for example, through ingestion, breathing, or skin puncture.
How do u catch a virus?
Viruses spread through tiny droplets in the air that are released when a sick person sneezes, coughs, or blows their nose. You can get sick if you touch your nose, eyes, or mouth after you have touched something contaminated by the virus, such as a toy, countertop, or doorknob.
Why don’t doctors give antibiotics for viral infections?
Antibiotics won’t treat viral infections because they can’t kill viruses. You’ll get better when the viral infection has run its course. Common illnesses caused by bacteria are urinary tract infections, strep throat, and some pneumonia.
Can antibiotics kill a virus?
Antibiotics cannot kill viruses or help you feel better when you have a virus. Bacteria cause: Most ear infections. Some sinus infections.
What are 2 ways viruses can reproduce?
There are two processes used by viruses to replicate: the lytic cycle and lysogenic cycle. Some viruses reproduce using both methods, while others only use the lytic cycle. In the lytic cycle, the virus attaches to the host cell and injects its DNA.
How do we fight viruses?
A virus-bound antibody binds to receptors, called Fc receptors, on the surface of phagocytic cells and triggers a mechanism known as phagocytosis, by which the cell engulfs and destroys the virus. Finally, antibodies can also activate the complement system, which opsonises and promotes phagocytosis of viruses.