By Michael (PoC Admin)
Bengal Nose - a comparison between a good nose and an affected nose - photo copyright Helmi Flick
Bengal Nose refers to a condition, which is a dry, crackly nose leather reported by breeders and in a research paper. It is not as far as I am aware a medical term. The nose leather (for people not in the cat fancy) is the end of the nose for a cat. Some breeders think the condition is caused by an incorrect diet in which there is a shortage of Essential Fatty Acids (EFAs). In that case rubbing vitamin E oil on the nose alleviates the condition. At least one vet diagnosed it as a food allergy, which was cleared up by a change in diet incorporating a different protein level.
However, a research article emanating from Sweden tells a different story. Diet may be a factor but there are other causes. There is also the question as to whether this condition is inherited from the Asian Leopard cat, the wild cat ancestor to the Bengal cat. For the time being, it is the research paper that tells us something about this disease. Perhaps more work is required? Or more cat breeder input.
The research was self funded and is entitled, "A novel ulcerative nasal dermatitis of Bengal cats" - Author: K. Bergvall. The author refers to the condition as a unique dermatitis that affects Swedish Bengal cats. It, in fact, seems to affect non-Swedish Bengal cats too. The work was carried out on 48 cats over the period 1999-2003. This is many years ago and it surprises me that it has only now being talked about. Perhaps I (and others) were unaware of it but breeders (or some breeders) were aware of it and didn't discuss it. How prevalent is it? Not sure, but of the 48 cats presented to the researcher 6 had crusts, fissures, erosions and ulcers of the nasal planum. That represents 12.5% of the total. The current percentage may be lower. Planum means "A plane or flat surface". Nasal means "pertaining to the nose". That doesn't exactly tell me the area we are talking about but as it is the nose leather (info from breeders - above) it must refer to the flat surface at the end of the cat's nose.
The condition was found to start at 4 months to 1 year of age. Antibiotics did not work. Salicylic acid improved the lesions in one of two cats treated. Prednisolone (a synthetic steroid similar to hydrocortisone - it is used as and anti-inflammatory drug and is a immunosuppressive drug) proved effective in curing one cat and partially cured another. Steroids are, as far as I am aware, a last resort in treatments as they can cause side effects. Some breeders wouldn't consider steroids to be suitable to control this condition, for an otherwise healthy kitten.
The most successful drug in treating "Bengal Nose" was Tacrolimus ointment. This is an immunosuppressive drug used with corticosteroids to prevent the rejection of transplanted organs in humans. This drug decreased the lesions in 4 cats. Lesion means "discontinuity of tissue". In this case it means that the nose leather is not cut but made up of broken tissue as a result of the condition.
The researcher speculated that it was an inherited disease and one linked to the immune system of the cat. Cat breeding cat lead to defective immune systems and higher levels of ill health in purebred cats. It is well known that purebreds generally live shorter lives that Moggies, on average. Inbreeding depression is a description of immune system malfunction or an immune system not working to full effect. Bengal Nose may be linked, therefore, to inbreeding in Bengal cats but this is pure speculation by me. It is, though, recognized that the Bengal breed has been developed from a small number of founding individual cats. Also the fact that the problem has no known environmental or dietary cause (i.e. it cuts across a variety of circumstances) and does not respond well to usual medication except as described above indicates a genetic illness.
There is no reference to it in Cat Owner's Home Veterinary Handbook, Fully Revised and Updated, a recommended book.
It there anyone who can shed light on Bengal Nose?
Definitions from www.thefreedictionary.com