Another early development in the history of correctional medicine was the work of Louis-René Villermé (1782–1863), a physician and pioneering hygienist whose study, Des Prisons, was published in 1820.
Dental hygienists in the United States must be graduates from a dental hygiene program, with either an associate degree (most common), a certificate, a bachelor's degree or a master's degree from a dental hygienist school that is accredited by the American Dental Association (ADA).
Friedrich Huldreich Erismann, or Fyodor Fyodorovich Erismann (14 November 1842 - 13 November 1915) was a Swiss ophthalmologist and hygienist born in Gontenschwil, canton of Aargau.
Julius August Christian Uffelmann (31 January 1837 - 17 February 1894) was a German physician and hygienist born in Zeven.
Werner Georg Kollath (11 June 1892 in Gollnow, now Goleniów - 19 November 1970 in Porza) was a German bacteriologist, hygienist and food scientist.