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A life form (also spelled life-form or lifeform) is an entity that is living, [1] [2] such as plants , animals , and fungi . It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species, [3] are extinct. [4] [5] Earth is the only celestial body known to harbor life forms. No form of ...
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.
The body has defence mechanisms that enable it to resist microbial invasion of its tissues and give it a natural immunity or innate resistance against many microorganisms. Pathogenic bacteria are specially adapted and endowed with mechanisms for overcoming the normal body defences, and can invade parts of the body, such as the blood, where ...
Examples of eukaryotic pathogens capable of sex include the protozoan parasites Plasmodium falciparum, Toxoplasma gondii, Trypanosoma brucei, Giardia intestinalis, and the fungi Aspergillus fumigatus, Candida albicans and Cryptococcus neoformans. [59] Viruses may also undergo sexual interaction when two or more viral genomes enter the same host ...
Main article: Human parasite Endoparasites Protozoan organisms Common name of organism or disease Latin name (sorted) Body parts affected Diagnostic specimen Prevalence Source/Transmission (Reservoir/Vector) Granulomatous amoebic encephalitis and Acanthamoeba keratitis (eye infection) Acanthamoeba spp. eye, brain, skin culture worldwide contact lenses cleaned with contaminated tap water ...
E.coli was an example of why this is important, with genes encoding virulence factors in two strains of the species differing by at least thirty percent. [19] Such knowledge, along with more thorough study of genome gain, loss, and change, is giving researchers valuable insight into how pathogens interact in host environments and how they are ...
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No clear examples of archaean pathogens are known, [111] although a relationship has been proposed between the presence of some archaean methanogens and human periodontal disease. [112] Numerous microbial pathogens are capable of sexual processes that appear to facilitate their survival in their infected host. [113]
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related to: sample research with complete parts of life form and give two examples of pathogens