In the novel "I.Q" a member of the "M" continuum describes a universe where sentient organic beings were unaware of microscopic beings that existed symbioticaly within them. In fact these micro-organisms were the controlling species unbeknownst to the larger. This reminds me of the "midichlorians" that make up the Force, which controls the Star Wars "universe".
According to Peter David this is entirely coincidental. To quote him
We turned in the MS [manuscript] like a year before "Phantom Menace," so no. Just coincidence.
Note that The Phantom Menace was released theatrically on 19 May 1999 in most locations, while the audio book version of I, Q was first released in September 1999.
This means that the audio recording would have happened prior to September 1999 (or done very hastily that month), meaning that a complete manuscript of the book would almost certainly have been available for recording purposes in the summer. This leaves only a very short period of time between the release of The Phantom Menace and the completion of I, Q.
Neither John de Lancie nor Peter David (co-authors of the novel) have commented publicly on any connection between Star Wars and I, Q (midichlorians or otherwise).
Given the timing and the lack of information, I suspect this is a coincidence at best.