01540nas a2200337   4500000000100000008004100001260001300042653001500055653001000070653000900080653001000089653002100099653003400120653001100154653002600165653002600191653001100217653001100228653002300239653001200262653001400274653000900288653001600297100001600313700001700329245008100346300001100427490000800438520074200446022001401188       1975                            d  c1975 Oct10aAdolescent10aAdult10aAged10aChild10aChild, Preschool10aContinental Population Groups10aFemale10aHistory, 19th Century10aHistory, 20th Century10aHumans10aInfant10aLeprostatic Agents10aleprosy10aLouisiana10aMale10aMiddle Aged1 aFeldman R A1 aSturdivant M00aLeprosy in Louisiana, 1855-1970. An epidemiologic study of long-term trends.  a303-100 v1023 a<p>Study of a well known focus of leprosy in Louisiana in 1855-1970 showed a decrease in incidence which began before the use of chemotherapy. Many of the cases had onset in a limited area of Louisiana, French Louisiana, where there was a high incidence of multiple family cases. Overall incidence rates were found to be decreasing for each cohort of birth, and within cohorts after 1920, the highest incidence rates were in the age group 10-19. A high incidence rate was found for cases with onset in the years 1900-1929; rather than an epidemic, this was probably related to bias in the recording of year of onset. Although persistent for a long period, the focus remained limited in geographic extent and seems to be disappearing.</p>  a0002-9262