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Shapes of bacteria shapes of bacteria10/3/2023 ![]() The coccus cells can of course also form a long line, which would be called streptococci.Īnd the last form that is given its own special name is if the coccus cells were to form a triangle shape, which is then called staphylococci. If another of these tetrad cells were to join together – with 8 coccus cells in total – forming a cube shape, this is called a sarcina. If 4 cells were to join together in a square shape, it would be called a tetrad. Where 2 of these coccus cells have joined together, this is referred to as diplococci. ![]() There are different names for these forms of bacteria depending on where exactly the coccus bacteria have joined together, and what shape they have.Ī single cell is of course called monococcus. It can exist as a single celled organism, or it can form groupings with other coccus bacteria cells. This is because the bacteria appears as a circle. The second most common shape of bacteria is the coccus bacteria, also known as the spherical shaped bacteria. What’s really fascinating about bacillus bacteria is that they are very heat resistant, and can survive in temperatures up to a whopping 788 degrees Fahrenheit!Īlongside being extremely heat resistant, these types of bacteria can spend years living dormant, and are resistant to disinfectants and radiation. These appear as an oval shape when compared to the standard rod shapes and spherical shapes of the other two shapes of bacteria. If there were only two cells of bacteria joined end to end, this is called diplobacilli.Īnd if the bacteria has joined together via the longer sides, so that they all sit parallel to each other, these are called palisades.īacillus can of course occur as a single celled organism, too.Ī different type of bacillus exists which is a kind of cross between bacillus and coccus bacteria, known as coccobacillus. The rod shapes will join up together from end to end to form these chains, which are referred to as streptobacillus. If you were to look at this rod shaped bacteria under the microscope, you would notice that it is able to form a chain of different bacteria. Some of the most common types of bacteria that have the bacillus shape are E.coli and Bacillus anthracis, which is the bacteria that is known to cause anthrax. The rod shaped bacteria tends to be between 0.5 micrometers and 1 micrometers in width, and then between 1 micrometers up to 4 micrometers in length. The bacillus shape is in the form of a rod, and it can differ in terms of size. One of the main shapes of bacteria is the rod shaped form, or bacillus if you wanted to use its scientific name. The last 3 of these tend to be lumped in a category together, but we shall cover each of them in more detail so you can see how they differ from one another. While some scientists will argue that there are actually 3 most common shapes of bacteria, we’re going to cover the 5 different common shapes of bacteria. Let’s take a look at the different shapes of bacteria and see how we can tell them all apart! What Are The Most Common Shapes Of Bacteria? ![]() Today, we’re going to take a closer look at the different shapes of bacteria to help you learn a little more about each different one.Įven though there are lots of different factors that come into play here, pretty much all of the bacteria that exist in the world can be sorted into 5 distinct categories based entirely on their shape. ![]() That is of course the shape that they appear in! Some types of bacteria appear very similarly to one another, and it’s all down to the shape that makes up their overall structure.īut why are there different shapes of bacteria? And what are the different shapes of bacteria, anyway?
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