I'm not sure but I don't think you can titer test for Bordatella.
I don't think everyone really understands how titer tests work because I don't think many of us truly understand how the immune system works, maybe there just isn't enough information and too many vets are clueless about it.
One fallacy is that in an adult dog, a low titer test reading DOESN'T mean your dog has no immunity to that disease. There are two ways the immune system responds to vaccinations and/or the natural disease and titer tests only measure one (humoral immunity). If you take your dog for a walk and you happen to pass by the poo of a dog who was recently vaccinated for parvo, that dog will be shedding low levels of the virus and it will stimulate YOUR dog's immune system. If you titer test, your dog may have high levels for the parvo virus as his immune system has recently come across it. If he hasn't left his backyard for 2 years and hasn't come across parvo, he may have a low reading because there are no current antibodies (humoral immunity) fighting the virus. He may *still* have and most likely will have, cell mediated immunity, which is the memory cells a healthy immune system has whenever he was first exposed to the virus.
So, vaccinations are useless once your dog has formed immunity to that disease. You don't need a zillion antibodies floating around constantly because when a healthy dog comes into contact with a disease, his immune system (which has previously been exposed) will mount a healthy, two fold response to the perceived attack. Vaccinations only put stress on an otherwise healthy immune system
The antibodies that a titer test measures die in a few days anyway because it is the memory cells that protect for long term immunity.
What Titer Tests DO show is that yes, your dog who frequently goes to places where he will come in contact with low levels of the virus (or high if there really is the disease around) has a working, healthy immune system that mounts a response to the possible virus and that he isn't an unlucky 'non responder' whose system will never mount a response.
It is much safer to titer test instead of vaccinating once a dog has had it's 1st year vaccination on an adult immune system. It is impossible to "boost" an immune response as vaccinations are supposed to do, as the dog *already* has immunity via his unmeasurable (unfortunately) memory cells.
I hope that helps. I'm not expert but I read a LOT when considering how to vaccinate my own pup.