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The spread of diseases across wide geographic scales has increased through history. Early diseases that spread from Asia to Europe were bubonic plague, influenza of various types, and similar infectious diseases. In the current era of globalization, the world is more interdependent than at any other time.
In biology, a pathogen (Greek: πάθος, pathos "suffering", "passion" and -γενής, -genēs "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. [1] The term pathogen came into use in the 1880s.
Climate change is affecting the distribution of these diseases due to the expanding geographic range and seasonality of these diseases and their vectors. [ 5 ] : 9 Though many infectious diseases are affected by changes in climate, vector-borne diseases, such as malaria, dengue fever and leishmaniasis, present the strongest causal relationship.
The following outline is provided as an overview of and topical guide to concepts related to infectious diseases in humans.. Infection – transmission, entry/invasion after evading/overcoming defense, establishment, and replication of disease-causing microscopic organisms (pathogens) inside a host organism, and the reaction of host tissues to them and to the toxins they produce.
He said some pathogens that contaminate food are even showing up in the U.S. for the first time thanks to climate change. "There are bugs in the United States we never saw before.
Climate change can affect organisms by elongating their reproductive cycles. [26] In addition to this, climate change allows for pathogens to expand beyond tropical zones, dramatically impacting species because of the introduction of new pathogens. [29] These impacted species include humans and human livestock. [29]
The World Health Organization listed the top pathogens that could cause future outbreaks and pandemics, including Disease X. Here’s what you need to know. These Are the Deadliest Pathogens Out ...
An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. [1] An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection.