Primary polydipsia rare non-psychogenic causes. An example is polydipsia found in patients with autoimmune chronic hepatitis with severely elevated globulin levels. Evidence for the thirst being non-psychogenic is gained from the fact that it disappears after treatment of the underlying disease. Psychogenic polydipsia is also observed in some non-human patients, such as in rats. Primary polydipsia Primary polydipsia is a form of polydipsia characterised by excessive fluid intake in the absence of physiological stimuli to drink. This includes psychogenic polydipsia (PPD – not to be confused with postpartum depression), which is caused by psychiatric disorders, often schizophrenia, and often accompanied by the
Polydipsia in birds has been experimentally induced in pigeons, budgerigars and ducks, by the administration of lithium chloride (LiCl). The polydipsic effect was greatest in budgerigars, a desert-dwelling species with a well-developed fluid retention system, and least in ducks, a species with an efficient sodium-secretion system. In waterfowl, polydipsia can be a symptom of duck virus enteritis. Polydipsia has also been listed as a symptom of many diseases, including In hens, lesions of the supraoptic hypothalamus of the brain can result in polydipsia. Polydipsia sometimes occurs under housing or experimental conditions which purportedly lead to stress or frustration. Growing parent stock of meat-type