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Heyndrickxia Coagulans
''Heyndrickxia coagulans'' (formerly ''Bacillus coagulans'') is a lactic acid–forming bacterial species. This species was transferred to ''Weizmannia'' in 2020, then to ''Heyndrickxia'' in 2023. Description ''H. coagulans'' is a Gram-positive, catalase-positive, spore-forming, Motility, motile, facultative anaerobe rod that measures approximately 0.9 μm by 3.0 μm to 5.0 μm. It may appear Gram negative when entering the Stationary phase (biology), stationary phase of growth. The optimum temperature for growth is ; the range of temperatures tolerated is . IMViC tests VP and MR (methyl red) are positive. Taxonomic history The species was first isolated and described in 1915 by B.W. Hammer at the Iowa Agricultural Experiment Station as a cause of an outbreak of coagulation in evaporated milk packed by an Iowa condensed milk, condensary. Separately isolated in 1935 and described as ''Lactobacillus sporogenes'' in the fifth edition of ''Bergey's Manual of Syst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram Stain
Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria and gram-negative bacteria. It may also be used to diagnose a fungal infection. The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique in 1884. Gram staining differentiates bacteria by the chemical and physical properties of their Cell wall#Bacterial cell walls, cell walls. Gram-positive cells have a thick layer of peptidoglycan in the cell wall that retains the primary stain, crystal violet. Gram-negative cells have a thinner peptidoglycan layer that allows the crystal violet to wash out on addition of ethanol. They are stained pink or red by the counterstain, commonly safranin or fuchsine. Lugol's iodine solution is always added after addition of crystal violet to form a stable complex with crystal violet that strengthens the bonds of the stain with the cell wall. Gram staining is almost al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
