By What is the morphology of Bacillus megaterium?
Bacillus megaterium is a gram positive, spore producing bacteria. It is a Eubacteria and is found in the soil. It has a rod shape and is one of the largest Eubacteria. Colonies form in chains due to sticky polysaccharides on the cell wall.
What is the cellular morphology and arrangement of Bacillus megaterium?
Bacillus megaterium is a rod-like, Gram-positive, mainly aerobic spore forming bacterium found in widely diverse habitats. With a cell length of up to 4 µm and a diameter of 1.5 µm, B. megaterium is amongst the biggest known bacteria.
Is Bacillus megaterium Gram-positive or Gram negative?
B. megaterium is a Gram-positive, aerobic spore-forming neutralophilic bacterium found in diverse habitats but commonly regarded as a soil bacterium.
What color is Bacillus megaterium?
milk white
megaterium are concave, smooth and milk white, while B. mycoides looks white, coarser with fine threads around the colony and the color is milk white. The cell morphology (Figure 3 and Table 1) shows that the cell is rod-shaped, gram positive and sporous.
What is E coli morphology?
Morphology of E. E. coli is gram-negative (-ve) rod-shaped bacteria. It is 1-3 x 0.4-0.7 µm in size and 0.6 to 0.7 µm in volume. It is arranged singly or in pairs.
What is a Gram stain result?
A Gram stain is used, along with a culture of the material from an infected site, to identify the cause of a bacterial infection. The Gram stain provides preliminary results on whether bacteria are present and the general type, such as the shape and whether they are Gram-positive or Gram-negative.
Is E. coli Gram-positive or negative?
Escherichia coli (E. coli) is a Gram-negative, rod-shaped, facultative anaerobic bacterium. This microorganism was first described by Theodor Escherich in 1885.
What is colony morphology used for?
Observing colony morphology is an important skill used in the microbiology laboratory to identify microorganisms. Colonies need to be well isolated from other colonies to observe the characteristic shape, size, color, surface appearance, and texture. Another important characteristic of a bacterial colony is hemolysis.
Why is E. coli gram-positive?
coli is a Gram negative anaerobic, rod-shaped, coliform bacteria of the genus Escherichia, commonly found in the lower intestine of humans and animals. Most varieties are harmless. Some cause brief diarrhea. There are, however, a few serious strains such as E.