Adjective : endemic folkways; countries where high unemployment is endemic. ,a fever endemic to the tropics.    From Dictionary.com. 

The situation is damp and unwholesome, and the water so bad, that I should suppose a long continuance here of such a number of prisoners must be productive of endemical disorders.    From Wordnik.com.  [A Residence in France During the Years 1792, 1793, 1794 and 1795, Complete Described in a Series of Letters from an English Lady: with General and Incidental Remarks on the French Character and Manners] Reference

When the weather breaks many fall sick, this being the time of an endemical sickness, for seasonings, cachexes, fluxes, scorbutical dropsies, gripes, or the like which I have attributed to this reason.    From Wordnik.com.  [Medicine in Virginia, 1607-1699] Reference

The aspect of the places subject to the ravages of typhus seems often to exclude all idea of a local or endemical origin.    From Wordnik.com.  [Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1] Reference

I ever obferve, that the fudden, and great tranfitions which are Co often experienced, had any bad effefton the conftitution; nor do I know of one endemical complaint.    From Wordnik.com.  [A Journal of Transactions and Events, During a Residence of Nearly Sixteen ...] Reference

The first thing that we shall do is to state, and which we shall prove in evidence, that this vice of bribery was the ancient, radical, endemical, and ruinous distemper of the Company's affairs in India, from the time of their first establishment there.    From Wordnik.com.  [The Works of the Right Honourable Edmund Burke, Vol. 10 (of 12)] Reference

It should also be brought to mind, that cholera asphyxia is not a new disease to these natives, but seems to be, in many places, almost endemical, whilst it is well known that strangers, in such circumstances, become more obnoxious to the disease than the inhabitants of the country.    From Wordnik.com.  [Letters on the Cholera Morbus. Containing ample evidence that this disease, under whatever name known, cannot be transmitted from the persons of those labouring under it to other individuals, by contact—through the medium of inanimate substances—or through the medium of the atmosphere; and that all restrictions, by cordons and quarantine regulations, are, as far as regards this disease, not merely useless, but highly injurious to the community.] Reference

BABBALANJA -- It was endemical, your Highness.    From Wordnik.com.  [Mardi: and A Voyage Thither, Vol. II (of 2)] Reference