Search results
Results from the WOW.Com Content Network
Microbial art, [1] agar art, [2] or germ art [3] is artwork created by culturing microorganisms in certain patterns. [4] The microbes used can be bacteria , yeast , fungi , or less commonly, protists .
Calymmatobacterium granulomatis; Campylobacter. Campylobacter coli; Campylobacter fetus; Campylobacter jejuni; Campylobacter pylori; Capnocytophaga canimorsus
Whitish gray sputum color against a white color background (such as a white sink surface) tends to indicate either a specimen from someone who is dehydrated, and/or from an older person, and/or a specimen with a mixed, modest number of eosinophils and maybe some acute inflammatory neutrophil cells (this last choice tends to suggest chronic ...
Gram-positive bacteria retain the crystal violet stain used in the test, resulting in a purple color when observed through an optical microscope. The thick layer of peptidoglycan in the bacterial cell wall retains the stain after it has been fixed in place by iodine. During the decolorization step, the decolorizer removes crystal violet from ...
Microscopic image of gram-negative Pseudomonas aeruginosa bacteria (pink-red rods). Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. [1]
The germ theory of disease is the currently accepted scientific theory for many diseases. It states that microorganisms known as pathogens or "germs" can cause disease. These small organisms, which are too small to be seen without magnification, invade animals, plants , and even bacteria .
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. [2] [3] Typically, the term pathogen is used to describe an infectious microorganism or agent, such as a virus, bacterium, protozoan, prion, viroid, or fungus.
In his research into tuberculosis, Koch finally proved the germ theory, for which he received a Nobel Prize in 1905. [258] In Koch's postulates, he set out criteria to test if an organism is the cause of a disease, and these postulates are still used today. [259] Ferdinand Cohn is said to be a founder of bacteriology, studying bacteria from ...