Firstly, i can tell you are upset and angry but it is really difficult to read your post because there are no capital letters or breaks.
You have found a very irresponsible breeder. I would be very wary about breeding from your kittens as i would not really trust the breeder that the kitten is a good example of the breed. You need to only breed from kittens that are healthy, good exapmples, from health screened parents. Bengals need to be tested for HCM (yearly scans) and PK Def (one off test) plus the standard screening that should be done prior to mating. Buying breeding cats needs a lot of research. To be honest, it is a fairly big step that needs a lot of research and you need to be prepared to spend a lot of money. You will need to make sure you can screen your cats and have the funds in case of emergencies... I am assuming your kittens were bought on the 'Active' register??
Onto Tritrichomonas...
It is treatable. Get you vet to send a sample of their poo for PCR or QPCR testing. This is the only test that is reliable for TF. Do not listen to a vet who tells you otherwise as it is not true. The sample needs to be taken 1 week after finishing antibiotic or Panacure treatment as this can give you a false negative. If your kittens are positive, they need treatment with Ronidazole. Again, this is teh ONLY drug that will kill TF. This treatment is 1 dose per day for 14 days. Once they are clear, there is no reason not to breed from a TF point of view but remember your kittens have not had the best start in life so may not really be suitable to breed from
This is a UK fact sheet but the facts are still true if you are in the US it's just the recommended laboratory that is appropriate:
http://www.fabcats.org/breeders/infoshe ... monas.htmlPlease get them tested at the appropriate timescale... and please really think about breeding.