Essay On Infectious Diseases
Definitions of Infectious Diseases
An infectious disease is an pathogenic infection caused by the spread of a microorganism, such as bacteria, virus, fungus, or a parasite. Germs are known as pathogens, tiny organisms that invade the body and make you sick. Majority of the microorganisms that live in our bodies or on our skin are harmless.These are called good microorganisms,they are beneficial to our health by providing protection from the bad microorganisms. While on the other hand, when given the right circumstances some microorganisms can cause harmful diseases. Infectious diseases can be passed from one person to another, transmitted from insects bites or animals, by ingesting contaminated food or water, or being exposed to a toxic environment.
There are four different kinds of infectious diseases, bacterial, viral, fungal, and parasitic. Bacterial infections are caused by small bad bacteria that can be examined on;y by a microscope. Harmful bacteria can cause
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There are two ways to come in contact with infectious agents,either directly or indirectly. Direct contact is by coming in contact with an infected a host and then ontracing the disease. Infectious disease can spread through direct contact by these three examples, from one person to another, from animal to person, or mother to unborn child. Person to person is a very common way for infectious agents to spread, for example, touching, kissing, coughing, or sneezing on someone who is not infected. Pathogens can even spread through the exchange of body fluids from sexual contact. Some people may even have the disease but have no symptoms, this is simply known a carrier. Animals may pass harmful germs to a person if the person is bitten or scratched by infected animal. If a pregnant woman contracts harmful germs, it can allow an entryway for the pathogens to pass through the placenta to the unborn
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839 Words | 4 PagesTASK 2 Infectious diseases are the invasion of host organisms, (microbes) which can be invisible to the eyes. The microbes are also known as pathogens. A microbe infects an organism (which is known as the host of the microbe). In a human host, the microorganism causes a disease by either disrupting an important body process or by stimulating the immune system to mount a defensive reaction. The pathogen, interferes with the normal functioning of the host and can lead to chronic wounds, gangrene, loss of an infected limb, and even death.
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