That coupled with popular sire syndrome, which still occurs, caused a rise in incidence of Fanconi. There is more than just Fanconi Syndrome that a breeder has to consider. Hip Dysplasia is on the rise in our breed, we also have PRA, IPSID, hypothyroidism, and luxating patellas. It makes no sense to eliminate dogs that are carriers for Fanconi but have good hips, normal thyroids, good patellas, healthy eyes, and a pedigree of tested relatives that all have the same. Making breeding choices based on only one trait that can be avoided by sensible breeding could very well lead to the end of the breed.
There are not many places left in Africa that have populations significantly isolated enough to be purebred basenji. Then there is the expense and the fact that the situation in Africa is unsettled so it is not always safe to travel there. It is not feasible to test in the field, results take a minimum of 3 weeks to receive results for the two disorders that we have DNA tests.
The best thing for the breed is for breeders to slowly breed away from the disease. That means breeding their Carriers and in some cases even their Affected males to Clears until they get Clear offspring with the other traits that they are seeking to preserve.