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The Great Barrier Reef is the world's largest structure composed of living entities, stretching 2,000 km (1,200 mi) but contains many organisms of many types of species. When considering singular entities, the largest organisms are clonal colonies which can spread over large areas.
In some infectious diseases, the severity of symptoms has been shown to be dependent on specific genetic traits of the host. [6] [7] 4. Organisms that look alike but behave differently: In some cases a harmless organism exists which looks identical to a disease causing organism with a microscope, which complicates the discovery process. [8] 5.
The first record of an economic impact of mycoviruses on fungi was recorded in cultivated mushrooms (Agaricus bisporus) in the late 1940s and was called the La France disease. [5] Hollings found more than three different types of viruses in the abnormal sporophores. This report essentially marks the beginning of mycovirology. [4]
Another specimen in northeastern Oregon's Malheur National Forest is possibly the largest living organism on Earth by mass, area, and volume – this contiguous specimen covers 3.7 square miles (2,400 acres; 9.6 km 2) and is colloquially called the "Humongous fungus". [2]
Approximately 300 fungi are known to be pathogenic to humans; [2] their study is called "medical mycology". Fungal infections are estimated to kill more people than either tuberculosis or malaria—about two million people per year. [3] In 2022 the World Health Organization (WHO) published a list of fungal pathogens which should be a priority ...
Fungi are eukaryotic organisms that can function as pathogens. There are approximately 300 known fungi that are pathogenic to humans, including Candida albicans, which is the most common cause of thrush, and Cryptococcus neoformans, which can cause a severe form of meningitis. [19] Typical fungal spores are 4.7 μm long or smaller. [20]
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Microorganisms are the causative agents in many infectious diseases. The organisms involved include pathogenic bacteria, causing diseases such as plague, tuberculosis and anthrax; protozoan parasites, causing diseases such as malaria, sleeping sickness, dysentery and toxoplasmosis; and also fungi causing diseases such as ringworm, candidiasis ...