facial features in a red point
Himalayan/Persian
Ultra-type consequences The modern-type
brachycephalic Persian has a large rounded skull and shortened face and nose. This facial conformation makes the breed prone to breathing difficulties, skin and eye problems, and birthing difficulties. Anatomical abnormalities associated with brachycephalic breeds can cause
shortness of breath. Persians are susceptible to
malocclusion (incorrect bite), which can affect their ability to grasp, hold and chew food. Malformed
tear ducts cause
epiphora, an overflow of tears onto the face, which is common but primarily cosmetic.
Entropion, the inward folding of the eyelids, causes the eyelashes to rub against the cornea and can lead to tearing, pain, infection and cornea damage. This condition is not uncommon in Persians and usually involves the medial aspect of the lower eyelid. Similarly, in upper-eyelid
trichiasis or nasal-fold trichiasis, eyelashes/hair from the eyelid and hair from the nose fold near the eye grow in a way that rubs against the cornea. The anatomical changes in the upper respiratory track caused by brachycephaly such as
stenotic nares,
elongated soft palate, and
nasopharyngeal turbinates contribute to obstruction of the airways and breathing difficulties. Due to the reduction of the maxillary alveolar space the Persian's teeth are positioned at abnormal angles and overlap, causing dental and
gingival problems. Brachycephaly causes the Persian to have shallow orbits and protruding eyes, this can lead to
keratitis,
sequestrum developments in the cornea, and non-healing
corneal ulcers. The reduction of the length of the
maxilla can cause excessive skin folds on the face, which may lead to the development of
idiopathic facial dermatitis. The brachcephalic skull of the Persian has led to changes in the morphology of the cranial cavity, causing
intracranial overcrowding,
herniation of the brain, and
hydrocephaly.
Dystocia, an abnormal or difficult labour, is relatively common in Persians. Consequently, the stillbirth rate is higher than normal, ranging from 16.1% to 22.1%, and one 1973 study puts the kitten mortality rate (including stillborns) at 29.2%. A veterinary study in 2010 documented the serious health problems caused by the brachycephalic head.
Life span The lifespan of Persian cats varies depending on their country. Pet insurance data from Sweden puts the median lifespan of cats from the Persian group (Persians, Chinchilla, Himalayan and Exotic) at just above 12.5 years, while most cats live until they are about 15 years old. 76% of this group lived for 10 years or more and 52% lived for 12.5 years or more. A 2024 UK study found a life expectancy of 10.93 years for the Persian (9.63–12.23) compared to an overall of 11.74 years (11.61–11.87).
Internal medical conditions Polycystic kidney disease (PKD) which causes kidney failure in affected adult cats has an incidence rate of 36–49% in the Persian breed. A study in Japan of cats suspected to have kidney problems found that 46% of tested Persian cats had the PKD1 mutation, which is responsible for feline polycystic kidney disease (PKD). Previous
ultrasonographic studies (involving procedures likely to be performed on cats suspected of kidney problems) found a PKD rate in Persian and related breeds of 49.2% in the UK, 43% in Australia, and 41.8% in France. The cause of PKD in the Persian is an
autosomal dominant mutation to the
PKD1 gene. Cysts develop and grow in the kidney over time, replacing kidney tissues and enlarging the kidney. Kidney failure develops later in life, at an average age of 7 years old (ranging from 3 to 10 years old). Symptoms include excessive drinking and urination, reduced appetite, weight loss, and depression. The disease is
autosomal dominant and DNA screening is the preferred method of eliminating the gene in the breed. Because of DNA testing, most responsible Persian breeders now have cats that no longer carry the PKD gene, hence their offspring also do not have the gene. Before DNA screening was available, an ultrasound was done. However, an ultrasound is only as good as the day that it is done, and many cats that were thought to be clear, were in fact, a carrier of the PKD gene. Only DNA screening and breeding cats that are negative for the PKD gene will produce kittens that are also negative for the gene, effectively removing this gene from the breeding pool.
Hypertrophic cardiomyopathy (HCM) is a common heart disease in all cats. It is likely hereditary in the Persians. The disease causes thickening of the
left heart chamber, which can, in some instances, lead to sudden death. It tends to affect males and mid- to old-aged individuals. The reported incidence rate in Persians is 6.5%. Unlike PKD, which can be detected even in very young cats, heart tests for HCM have to be done regularly to effectively track and/or remove affected individuals and their offspring from the breeding pool. Early onset
progressive retinal atrophy is a degenerative eye disease, with an autosomal recessive mode of inheritance in the Persian. Despite a belief among some breeders that the disease is limited to chocolate and Himalayan lines, there is no apparent link between coat colour in Persians and the development of PRA.
Basal-cell carcinoma is a skin cancer which shows most commonly as a growth on the head, back or upper chest. While often benign, rare cases of malignancy tend to occur in Persians. Blue smoke Persians are predisposed to
Chédiak–Higashi syndrome.
White cats, including white Persians, are prone to deafness, especially those with blue eyes.
Skeletal conditions A study of cats presented to the
University of Missouri-Columbia Veterinary Medical Teaching Hospital that underwent radiography found 3 Persians out of a population of 19 to have hip dysplasia, higher than the 6.6% average for all cats.
Other Other conditions which the Persian is predisposed to are listed below: • Dermatological – primary
seborrhoea, idiopathic periocular crusting,
dermatophytosis (ringworm), facial fold
pyoderma, idiopathic facial
dermatitis, multiple epitrichial cysts (eyelids) • Ocular –
coloboma,
lacrimal punctal aplasia, corneal sequestrum, congenital
cataract, congenital
polycystic liver disease (associated with PKD) • Cardiovascular – peritoneopericardial
diaphragmatic hernia • Immunological –
systemic lupus erythematosus • Neurological –
alpha-mannosidosis • Neoplastic –
basal-cell carcinoma,
sebaceous gland tumours • Drug sensitivity — Persians are more prone to side effects of ringworm drug
Griseofulvin. • Heat sensitivity
Idiopathic facial dermatitis Idiopathic facial dermatitis, also known as facial dermatitis of the Persian and Himalayan cat is a type of dermatitis only observed in the Persian and Himalayan cat. It's characterised by greasy skin, debris adhering to the folds of the face and nose,
ceruminous otitis externa, secondary bacterial
folliculitis and
Malassezia dermatitis, and
pruritus. Onset is at 10 months to 6 years. == Breeding ethics ==