How does infection occur in the human body?

How does infection occur in the human body?

Infection occurs when viruses , bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.

What happens when germs invade the human body?

When germs, such as bacteria or viruses, invade the body, they attack and multiply. This invasion, called an infection, is what causes illness. The immune system uses several tools to fight infection.

How are diseases transmitted from person to person?

The diseases that are transmitted this way are hepatitis B, glandular fever, cytomegalovirus infection, etc. Some diseases are spread by the urine of infected person coming in contact with a healthy individual through dirty hands or objects.

What happens to your body when you get a virus?

Bacteria can release toxins, or poisons. Viruses can take over cells and prevent them from doing their normal work. Bacteria and fungi—and larger infective agents like worms or other parasites—can multiply so rapidly that they physically interfere with the functioning of the lungs, heart, or other organs.

Infection occurs when viruses , bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear.

How does the body get rid of an infection?

White blood cells , antibodies, and other mechanisms go to work to rid your body of the foreign invader. Indeed, many of the symptoms that make a person suffer during an infection—fever, malaise, headache, rash—result from the activities of the immune system trying to eliminate the infection from the body.

How are bacteria harmful to the human body?

Sometimes bacteria multiply so rapidly they crowd out host tissues and disrupt normal function. Sometimes they kill cells and tissues outright. Sometimes they make toxins that can paralyze, destroy cells’ metabolic machinery, or precipitate a massive immune reaction that is itself toxic.

How can Lyme disease affect the body and what are the symptoms?

Stage 2 (1-4 months): Early disseminated Lyme disease. Here, the stages of one and two can overlap. As the bacteria continues to spread, the rash may also spread to other areas of the body. Neurological symptoms may begin to affect the nervous system and heart.