Saran's Learn Microbiology

Mycoplasma pneumoniae   GENERAL CHARACTERISTICS ·        Mycoplasma pneumoniae are the Smallest free-living bacteria. ·      Mycoplasma pneumoniae are unique among bacteria because they do not have a cell wall and their cell membrane contains sterols. In contrast, other cell wall – deficient bacteria (called L - forms) do not have sterols in their cell membrane and can form cell walls under the appropriate growth conditions. ·     The absence of the Cell wall renders the Mycoplasma pneumoniae resistant to Penicillin, Cephalosporins, Vancomycin and other antibiotics that interfere with synthesis of the cell wall. ·        Shape – Pleomorphic ·        Motility – Non-motile  ·        Capsule – Absent  ·        Endospores – Absent ·        Respiration ...

  VIRUS ·        Acellular in nature. ·        Measured in nanometer (nm) and Size was ranged from Size – 20 nm to 1500 nm. ·        Viruses can be visualized only under Electron Microscope. ·        Also called as “Living Chemicals” ·        Replicates only inside the living cell. ·        Viruses can be cultivated only in living cells (Obligatory parasites). ·        Locomotion – Non – motile ·        Viruses cause large number of diseases in humans (such as AIDS, Common cold, Poliomyelitis, SARS, Herpes, Hepatitis etc), plants (Tobacco mosaic disease, Papaya ring spot disease, etc) and Foot and mouth disease of animals. ·        The largest virus is Gaint Virus (Pithovirus sibericum) ü ...