The largest bacterium is Thiomargarita namibiensis, which can have a size of up to 0.75 mm in diameter and up to several millimeters in length.
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The largest bacterium is Thiomargarita namibiensis, which can reach up to 0.75mm in length, making it one of the largest known bacteria.
The average size of a bacterium is typically around 1-10 micrometers in diameter. However, some bacteria can be as small as 0.2 micrometers or as large as 750 micrometers.
To calculate the actual size of a bacterium, you need to measure the size of the bacterium in a microscope using a calibrated eyepiece or stage micrometer. Then, you can use the magnification of the microscope to convert the measured size into the actual size by dividing the measured size by the magnification used.
Bacillus subtilis is the largest among the three organisms mentioned - Staphylococcus epidermidis, Bacillus subtilis, and Escherichia coli. Bacillus subtilis is a rod-shaped bacterium that is larger in size compared to the spherical Staphylococcus epidermidis and Escherichia coli.
The smallest is a virus, specifically the Porcine circovirus, which has a genome size of only 1.7 kilobases.