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Pathogen

In biology, a pathogen or a germ in the oldest and broadest sense is anything that can produce disease; the term came into use in the s. Typically the term is used to describe an infectious agent such as a virus, bacterium, protozoa, prion , a fungus, or other micro-organism. The scientific study of pathogens is called. A pathogen or infectious agent is a biological agent that causes disease or illness to its host. However, pathogens can infect unicellular organisms from all of the biological kingdoms. The human body contains many natural defenses against some of common pathogens in the form of. any disease-producing agent, especially a virus, bacterium, or other microorganism. An agent that causes infection or disease, especially a microorganism, such as a bacterium or protozoan, or a virus. Microorganisms, viruses, and toxins are examples of pathogens.

The chain of infection. What is a pathogen? The first link in the chain of infection is the pathogen. A pathogen is anything that causes a disease. Pathogens include: Bacterium A group of microscopic organisms that are capable of reproducing on their own, causing human disease by direct invasion of body tissues. Bacteria. Pathogenic treponemes comprise both cultivable and uncultivable human and animal pathogens [1]. While uncultivable treponemes represent bacterial species and subspecies that are obligate pathogens causing defined treponemal diseases in humans and animals (Table ), cultivable treponemes are involved in. Define pathogen: a specific causative agent (such as a bacterium or virus) of disease.

We normally think of pathogens in hostile terms—as invaders that attack our bodies. But a pathogen or a parasite, like any other organism, is simply trying to live and procreate. Living at the expense of a host organism is a very attractive strategy, and it is possible that every living organism on earth is subject to some type of. Find the latest research, reviews and news about Pathogens from across all of the Nature journals. Infection with a pathogen does not necessarily lead to disease. 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. The incidence of disease among.

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