This doesn't sound good now at all...sleeping at the bottom of the cage is not at all normal, and is typically a sign that they are quite sick...They do that because they cannot balance themselves on a perch, or cannot put forth the energy to do so...This is scary...
I'll say the same thing I already said and that Laura said, Baytril (Enrofloxacin) does not in any way treat Psittacosis Chlamydia, which can be caused by 3 different strains of bacteria, none of which are treated by Baytril or any of the other drugs in that particular family of antibiotics. Doxycycline is the most-effective drug for treating all 3 strains of bacteria that cause Psittacosis Chlamydia, but it must be at the very least a 21-day course of the Doxycycline, with a 45-day course being the new "standard of treatment" because of how well Psittacosis Chlamydia "hides" and how often birds with it end-up relapsing...
As Laura said, Psittacosis is a bacterial infection that regularly is "shedded" by birds, and it's extremely common to get a false-negative on the blood work...However, the most common outward signs/symptoms of Psittacosis are #1) All upper-respiratory/sinus symptoms such as coughing, wheezing, runny nostrils (clear discharge), and conjunctivitis in both eyes. These are the "classic" signs/symptoms of Psittacosis. So I don't know if your bird has been displaying any of these signs/symptoms since you first noticed something wasn't quite right, but if the only signs/symptoms of illness that your bird has been displaying are lethargy, sleeping during the day, going to the bottom of the cage to sleep, and anorexia, then I'd have to say that it's probably not Psittacosis because at this point I'd think that he would showing the upper-respiratory symptoms and the conjunctivitis in both eyes...
***A lot of Vets unfortunately prescribe a long course of a broad-spectrum antibiotic when they know something is wrong with the bird because of how they are acting, outward signs/symptoms they are displaying, and also an elevated WBC count, just like your bird had...(By the way, I have no idea what the hell that receptionist was talking about with the "Oral Swab" being the reason that the culture showed bacteria;
laboratories who run cultures/swabs know what "normal" or "healthy" bacteria commonly live in the mouth, the GI Tract, the nostrils, etc. of each different animal, and when they plate a swab/culture and bacteria grows-out, it's the different strains of bacteria they identify that actually diagnose a particular infection or illness, with any "healthy" or "normally found" bacteria being identified and disregarded! That's how a streak-plate culture works and is read! So that receptionist was just running her mouth to try to get you to go "Oh, okay." and to drop it.
Unfortunately, Baytril (Enrofloxacin) is the broad-spectrum antibiotic that Vets usually prescribe to birds, reptiles, amphibians, rodents, etc. when they know they have some type of infection based on the WBC count and their outward symptoms, but they can't identify where the infection is or what bacteria is causing it...Unfortunately "broad-spectrum" does not at all mean "Will treat any and all bacterial infections", not even close, and also unfortunate is that Baytril is really harsh on their GI Tracts, very, very often causing an upset stomach and anorexia, as well as a secondary Fungal (yeast) infection...Which will of course make your bird very sick if not treated...
Did you say that they also gave your bird a prescription Anti-Fungal medication??? Did they also identify a Fungal/Yeast infection on a culture? Or did they also just prescribe an Anti-Fungal "just in case" like they did with the Baytril? Did they prescribe a daily Probiotic supplement as well? I hate to say this but this CAV seems not at all like a CAV or Avian specialist to me, but rather like any old Exotics Vet that doesn't have a clue what they're doing, from the whole "doing the appointment/exam outside" because "Lovebirds carry PBFD" (so wrong) to the prescribing Baytril and an Anti-Fungal "just in case" without a specific diagnosis, to getting an elevate WBC count but not running additional, simple swabs/cultures to properly diagnose what microbe is causing the infection and where the infection actually is!!! It's quite possible that your bird never had ANY Bacterial infection at all, but rather a Fungal/Yeast infection from the start, as BOTH will cause an elevated WBC!!! And if that's the case, then the Baytril would only serve to make your bird much, much sicker by causing the Fungal/Yeast infection to grow out of control because a broad-spectrum antibiotic will kill-off ALL the healthy, normal bacteria living in your bird's GI Tract, which is what protects your bird's gut against Fungal/Yeast infections in the first place!
I'm quite concerned about your bird now, since he's been sick for so long at this point (of course probably ill long before any outward signs/symptoms became evident) and since he's now sleeping on the floor and his appetite has lessened/is completely anorexic...This is not good. I highly suggest you find a different CAV/Avian Specialist, call them and explain the situation and make ask for an emergency appointment, and have all of the test results sent to them from this first vet...This is not good.
