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A thermophile is an organism—a type of extremophile —that thrives at relatively high temperatures, between 41 and 122 °C (106 and 252 °F). [1][2] Many thermophiles are archaea, though some of them are bacteria and fungi. Thermophilic eubacteria are suggested to have been among the earliest bacteria. [3]
S. marcescens is a motile organism and can grow in temperatures ranging 5–40 °C (41–104 °F) and in pH levels ranging from 5 to 9. It is differentiated from other Gram-negative bacteria by its ability to perform casein hydrolysis, which allows it to produce extracellular metalloproteinases which are believed to function in cell-to-extracellular matrix interactions.
A hyperthermophile is an organism that thrives in extremely hot environments—from 60 °C (140 °F) upwards. An optimal temperature for the existence of hyperthermophiles is often above 80 °C (176 °F). [1] Hyperthermophiles are often within the domain Archaea, although some bacteria are also able to tolerate extreme temperatures.
The amoeba thrives at moderately elevated temperatures, making infections more likely during summer months. N. fowleri is a facultative thermophile, capable of growing at temperatures up to 46 °C (115 °F). [12] Warm freshwater with an ample supply of bacteria as food provides a suitable habitat for amoebae.
One option is temperature control—i.e., keeping all cold water below 25 °C (77 °F) and all hot water above 51 °C (124 °F). [3] Temperature affects the survival of Legionella as follows: [3] Above 70 °C (158 °F) – Legionella dies almost instantly; At 60 °C (140 °F) – 90% die in 2 minutes (Decimal reduction time (D) = 2 minutes)
The bacteria grow best at warm temperatures [4] and thrive at water temperatures between 25 and 45 °C (77 and 113 °F), with an optimum temperature of 35 °C (95 °F). [23] Temperatures above 60 °C (140 °F) kill the bacteria. [ 24 ]
A mesophile is an organism that grows best in moderate temperature, neither too hot nor too cold, with an optimum growth range from 20 to 45 °C (68 to 113 °F). [1] The optimum growth temperature for these organisms is 37 °C (about 99 °F). [2] The term is mainly applied to microorganisms.
Pathogenic bacteria. 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 are often beneficial but others can cause infectious diseases. The number of these pathogenic species in humans is estimated to be fewer than a hundred ...