• Microbiology

    Morphology of Bacteria

    Size The unit of measurement used in bacteriology is the micron (micrometre) 1 micron (μ) or micrometre (μm) – one-thousandth of a millimetre 1 millimicron (mμ) or nanometer (nm) – one-thousandth of a micron or one-millionth of a millimetre 1 Angstrom unit (Å) – one-tenth of a nanometer The limit of resolution with the unaided eye is about 200 microns. Bacteria aresmaller which can be visualized only under magnification. Bacteria come in a great many sizes and several shapes. Most bacteria range from 0.2 to 2.0 μm in diameter and from 2 to 8 μm in length. (anoverall average size of 1 to 10 μm.) Shape Depending on their shape,…

  • Microbiology


    The word microbiology is derived from the Greek word, MICRO means small, BIOS means life and LOGIA means study. It is the study of microscopic organisms either unicellular, multicellular or acellular. Microbiology include disciplines of Virology, mycology and bacteriology etc. Eukaryotic microorganisms exhibit cell organelles and include fungi, protists and algae. Prokaryotic microorganisms are conventionally classified as lacking organelles and include Eubacteria, Archaebacteria. Microbiologist traditionally relayed on culture, staining and microscopy. However, if only 1 percent of microbes present in the environment are culture able. Microbiologist often relay on extraction or detection of nucleic acid either DNA or RNA. Viruses are not always classified as organisms as they have been…


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