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Staphylococcus is a gram positive, cocci shaped, genus of bacteria. Observed under a microscope will reveal they exist in microscopic ‘grape-like’ clusters. One species of staphylococci, Staphylococcus aureus, can grow at temperature ranges of 15-45ºC and at a relatively high NaCl concentration of 15%.
Only a tiny amount of bacteria found on Earth are actually associated with disease. The number associated with human disease is as low as 0.001%. Bacteria are extremely small when compared to humans, for example the width of an average bacterium is often no greater than 1.5μm.
