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Some kinds of blue-green algae (cyanobacteria) create neurotoxins, hepatoxins, cytotoxins or endotoxins that can cause serious and sometimes fatal neurological, liver and digestive diseases in humans. Cyanobacteria grow best in warmer temperatures (especially above 25 degrees Celsius), and so areas of the world that are experiencing general ...
Climate change is altering the geographic range and seasonality of some insects that can carry diseases, for example Aedes aegypti, the mosquito that is the vector for dengue transmission. Global climate change has increased the occurrence of some infectious diseases. Infectious diseases whose transmission is impacted by climate change include, for example, vector-borne diseases like dengue ...
Pathogenic bacteria are bacteria that can cause disease. [1] This article focuses on the bacteria that are pathogenic to humans. Most species of bacteria are harmless and many are beneficial but others can cause infectious diseases. The number of these pathogenic species in humans is estimated to be fewer than a hundred. [2]
Mycobacterium leprae was discovered in 1873 by the Norwegian physician Gerhard Armauer Hansen (1841–1912), and was the first bacterium to be identified as a cause of disease in humans. [8] It was confirmed to be a bacterium by Albert Ludwig Sigesmund Neisser who argued with Hansen over priority for the discovery. [59]
The risk of acquiring Lyme disease from a tick bite is 1-3% in prevalent areas and is more common during late spring and summer months, peaking in June and July. Prompt tick removal reduces this risk.
Diseases in humans that are caused by infectious agents are known as pathogenic diseases. Not all diseases are caused by pathogens, such as black lung from exposure to the pollutant coal dust , genetic disorders like sickle cell disease , and autoimmune diseases like lupus .
Each year the pathogen causes an average of 900 deaths, 109,000 hospitalizations, 465,000 emergency room visits, and 19 to 21 million illnesses, according to the Centers for Disease Control and ...
A human pathogen is a pathogen (microbe or microorganism such as a virus, bacterium, prion, or fungus) that causes disease in humans. The human physiological defense against common pathogens (such as Pneumocystis ) is mainly the responsibility of the immune system with help by some of the body's normal microbiota .