The chappie Naessens who described somatids was investigated by the American Cancer Society. One of it's findings was
the particles he had seen were well known by hematologists to be products of red-cell disintegration. He also concluded that microorganisms that Naessens cultivated were the result of secondary contamination of the material studied.
(American Cancer Society. Naessens serum, or Anablast. Position paper, 1967
To be perfectly honest, the images I've seen at the website are so poor that I can't even identify the red blood cells as red blood cells and I've looked at a good many in my time!! Might as well be an MS Paint piccie. When carrying out microscopy on body fluids, you will always find small particles which "jiggle" about. These are mainly due to dust, crystals or cellular debris.
For more information on the discoverer of somatids try here;