What is the structure of Bacillus subtilis?

Bacillus subtilis are rod-shaped bacteria that are Gram-positive (Perez 2000). The cell wall is a rigid structure outside the cell. It is composed of peptidoglycan, which is a polymer of sugars and amino acids. The peptidoglycan that is found in bacteria is known as murein.

What is the importance of Bacillus subtilis?

They are widely used as feed additives in agriculture and animal husbandry to enhance animal fiber digestion and intestinal health. B. subtilis can improve the balance of intestinal flora and has the potential to improve intestinal health and food absorption efficiency.

What is the shape of Bacillus subtilis?

Bacillus subtilis is a rod-shaped organism about which much is known concerning structure and the function of the cell wall. The chemistry of the cell wall peptidoglycan has been well established (4), and an average glycan strand length of 96 disaccharides has been proposed (7).

What color does Bacillus subtilis stain?

During a Gram staining test, Bacillus subtilis retain the crystal violet dye, appearing purplish-blue under a microscope. This is due to the presence of a thick peptidoglycan layer.

Is Bacillus subtilis Gram-positive or negative?

B. subtilis is a fast-growing, Gram-positive, aerobic bacterium with rod-shaped cells that are typically 2–6 µm long and just less than 1 µm in diameter.

Is Bacillus subtilis acid fast positive?

Therefore, it was noted that B. subtilis was acid-fast negative, whereas M. smegmatis was acid-fast positive. The acid-fast stain is classified under differential staining procedures that are used to pick out acid-fast organisms, including bacteria of the genus Mycobacterium.

What is the morphology of a Bacillus?

Morphology: Cell: Rod shaped cells. Spore: The species are endospore formers. Shape of the spores varies with the species and maybe oval, ellipsoidal, cylindrical or spherical.

Is Bacillus subtilis motile or non motile?

Like many kinds of bacteria, B. subtilis is motile. It is capable of swimming in liquid medium, propelling itself by means of multiple, rotating flagella, which are displayed peritrichously (uniformly) around the cell. As is the case for Escherichia coli, swimming by B.

What is the structure of Bacillus?

Bacillus species are rod-shaped, endospore-forming aerobic or facultatively anaerobic, Gram-positive bacteria; in some species cultures may turn Gram-negative with age. The many species of the genus exhibit a wide range of physiologic abilities that allow them to live in every natural environment.

What is the morphology of a Bacillus?

Morphology: Cell: Rod shaped cells. Spore: The species are endospore formers. Shape of the spores varies with the species and maybe oval, ellipsoidal, cylindrical or spherical.

What is the arrangement and cell morphology of Bacillus?

Shape of Bacterial Cell

Bacilli (or bacillus for a single cell) are rod-shaped bacteria. Spirilla (or spirillum for a single cell) are curved bacteria which can range from a gently curved shape to a corkscrew-like spiral. Many spirilla are rigid and capable of movement.

What is the arrangement of Bacillus?

Bacilli usually divide in the same plane and are solitary, but can combine to form diplobacilli, streptobacilli, and palisades. Diplobacilli: Two bacilli arranged side by side with each other. Streptobacilli: Bacilli arranged in chains. Coccobacillus: Oval and similar to coccus (circular shaped bacterium).

Is Bacillus subtilis motile or non motile?

Like many kinds of bacteria, B. subtilis is motile. It is capable of swimming in liquid medium, propelling itself by means of multiple, rotating flagella, which are displayed peritrichously (uniformly) around the cell. As is the case for Escherichia coli, swimming by B.

Does Bacillus subtilis have a flagella?

B. subtilis has two forms of active movement, swimming and swarming motility that are powered by rotating flagella (73, 113).

How can you tell the difference between Bacillus subtilis and Bacillus cereus?

The key difference between Bacillus subtilis and Bacillus cereus is that Bacillus subtilis is fermenting mannitol, but it lacks the ability to produce enzyme lecithinase while Bacillus cereus is not fermenting mannitol, but it produces enzyme lecithinase. Bacillus is a genus of gram-positive, rod-shaped bacteria.

Is Bacillus subtilis acid fast?

Therefore, it was noted that B. subtilis was acid-fast negative, whereas M. smegmatis was acid-fast positive. The acid-fast stain is classified under differential staining procedures that are used to pick out acid-fast organisms, including bacteria of the genus Mycobacterium.

Is Bacillus subtilis catalase-positive or negative?

Bacillus subtilis (B. subtilis) is a Gram-positive, aerobic bacterium. It is rod-shaped and catalase-positive.

Is Bacillus subtilis aerobic or anaerobic?

Abstract. The Gram-positive soil bacterium Bacillus subtilis, generally regarded as an aerobe, grows under strict anaerobic conditions using nitrate as an electron acceptor and should be designated as a facultative anaerobe.

What does Bacillus subtilis eat?

A great number of these species eat the substances oozing out of our bodies. For example, several of the bacteria species that lives on our feet, including Bacillus subtilis, eat leucine, an amino acid common in the sweat on our feet.

Does Bacillus subtilis ferment lactose?

subtilis is able to complete glycolysis and the TCA (tricarboxylic acid) cycle because of its aerobic cellular respiration. B. subtilis can ferment glucose, sucrose, but not lactose.