After his arrival at the University of Pavia (1876), Golgi found and described (1880) the point (now known as the Golgi tendon spindle or Golgi tendon organ) at which sensory nerve fibres end in rich branchings encapsulated within a tendon. He also discovered (1883) the presence in nerve cells of an irregular network of fibrils (small fibres), vesicles (cavities), and granules, now known as the Golgi complex or Golgi apparatus. The Golgi complex is found in all cells except bacteria and plays an important role in the modification and transport of proteins within the cell.
Turning to the study of malaria (1885-93), Golgi found that the two
types of intermittent malarial fevers (tertian, occurring every other
day, and quartan, occurring every third day) are caused by different
species of the protozoan parasite Plasmodium and that the paroxysms
of fever coincide with release of the parasite's spores from red blood
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