Just what is the upper limit for Midi Chlorian counts?

[Chris Parr]

Say if you took a typical human's red blood cell of about 5 microns in diameter, and a Midi Chlorian was about the size of a nanobacteria—let's say about 50 nanometers—how many of those Midi Chlorians would realistically fit in the red blood cell without interfering with its primary function of carrying oxygen? I know it's over 20,000, but how much more?