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A pathogen (Greek pathos (suffering/emotion) and gene (to give birth to)) or infectious agent is a biological agent that causes disease or illness to its host.[1] The term is most often used for agents that disrupt the normal physiology of a multicellular animal or plant. However, pathogens can infect unicellular organisms from all of the biological kingdoms. The term pathogen is derived from the Greek παθογένεια, "that which produces suffering." There are several substrates and pathways where by pathogens can invade a host; the principal pathways have different episodic time frames, but soil contamination has the longest or most persistent potential for harboring a pathogen. The body contains many natural defenses against some of the common pathogens (such as Pneumocystis) in the form of the human immune system and by some "helpful" bacteria present in the human body's normal flora. However, if the immune system or "good" bacteria is damaged in any way (such as by chemotherapy, human immunodeficiency virus (HIV), or antibiotics being taken to kill other pathogens), pathogenic bacteria that were being held at bay can proliferate and cause harm to the host. Such cases are called opportunistic infections. Some pathogens (such as the bacterium Yersinia pestis, which may have caused the Black Plague, the Variola virus, and the malaria protozoa) have been responsible for massive numbers of casualties and have had numerous effects on afflicted groups. Of particular note in modern times is HIV, which is known to have infected several million humans globally, along with Severe Acute Respiratory Syndrome (SARS) and the Influenza virus. Today, while many medical advances have been made to safeguard against infection by pathogens, through the use of vaccination, antibiotics, and fungicide, pathogens continue to threaten human life. Social advances such as food safety, hygiene, and water treatment have reduced the threat from some pathogens.
What else can I help you with?
The temperature response is helpful in fighting pathogens because?
bacteria that cause human diseases do not grow well at high temperatures
What are microbes called when they make you sick?
Microbes that make you sick are often referred to as pathogens or harmful bacteria. These microorganisms can cause infections or diseases in the human body.
What causes infectious diseases in humans?
Certain pathogens enter and multiply within the human body.. (:
How can pathogens cause disease in the human body?
Pathogens can cause disease in the human body by invading tissues, releasing toxins, and triggering an immune response that can damage healthy cells and tissues.
What are the major reservoirs of pathogens?
The major reservoirs of pathogens include humans, animals, insects, and the environment. Pathogens can be carried and transmitted by these reservoirs, leading to the spread of diseases. It is important to identify and control these reservoirs to prevent the transmission of pathogens.
Why are plant pathogens important?
Organisms that cause plant diseases reduce our ability to produce food and support the economy.Everything from citrus to grains to ornamental plants are susceptible to plant diseases.Plant diseases cause billions of dollars worth of direct and indirect losses every year.Emerging plant pathogens require preparation and planned,scientifically-based response to lessen the impact on our farmers and the economy.
Diseases caused that are caused by archaea?
Archaea are not known to cause diseases in humans. They are typically found in extreme environments like hot springs or deep-sea vents. While some archaea can be pathogenic to other organisms, they are not known to be significant human pathogens.
How can littering cause human sickness?
Litterng can cause human sickness because the litter pollutes the air making the oxygen we breath in dirty. This can effect our lungs and the more pollution we breath in, the more gunky build up gathers in our lungs making it hard to breath. This is most likely the cause for asthma and other lung related conditions.
Does firmicutes cause human diseases?
No it does not because I'm smart like that
Why is human waste toxic?
Human waste contains harmful bacteria and pathogens that can cause diseases and infections if not properly managed or treated. It can also contain harmful chemicals and compounds that can harm the environment if released untreated into the surroundings. Proper disposal and treatment of human waste are essential to prevent health risks and environmental pollution.
Does human hair carry diseases?
Your hair carries the same kinds of bacteria (and fungi) as you skin does. These can cause diseases.
Does pathogens attack human tissue?
Yes, pathogens can attack human tissue by invading and multiplying within the body, leading to infection and disease. They can disrupt normal cell functions, cause damage to tissues, and trigger the immune system response.
