Working my way through questions:
@msf
why did it take so long to get the diagnosis? I have never heard of it taking seven months before.
@Jonathan Edwards
I would be interested to know how the diagnosis of yersinia infection was made and how come if it was made it took six months to get around to recommending treatment! In general an active bacterial infection should be treated within a couple of days.
Well, IRL medical care is often far from ideal

.
The timespan was partially due to a series of unfortunate events, although even under optimum conditions I don't think their process would allow for less than 6 months between tests and prescription.
1. KDM ran a large set of tests, results took 3 months to come in. This is apparently standard.
2. A friendly PR member told me that payment to the lab may be difficult, and to request a credit card form at the OV. I did this, but the nurse said, 'Oh, you don't need that,' and I did not insist. This was a BIG MISTAKE.
The lab said I could send payment by bank draft. I did this. First class mail to Belgium took 6 weeks, and when the draft arrived lab said they could not cash it. They tried to send it back to me but sent it to the wrong address. (I asked them to double check address, they said they sent it to correct one but I later saw the envelope and it was wrong city, wrong state.)
Without the physical copy of the bank draft, my bank could not stop payment on it. They had to wait 90 days for it to expire. (A very stressful 90 days, with my $4000 floating around in the mails. I had the tracking number and it crossed the ocean several times.)
For another payment form, the lab said they could NOT accept paypal. However, after exchanging hundreds of emails and finding no method that my bank could provide and theirs could accept, I just sent one euro by paypal to the secretary's work email account. They decided that was ok after all, and I sent the balance.
3. This released my lab results. Then it was 1 month for KDM to review the results and 2 more months for him to send his recommendations.
Oh, and for the KDM OV bill? A check sent to the address they gave me in Reno was returned, stamped 'address unknown'. But KDM's office does accept paypal (only for OVs, not for the labs).