The enumeration date is as you surmised the actual date the info was recorded. The official enumeration date was 1 June 1850, all questions were to refer to that date. So she probably died sometime between 1 June and Sept 11. Don.
Definition of plague. 1  an annoyance; those children are a damn plague. 2  any large scale calamity (especially when thought to be sent by God) 3  a swarm of insects that attack plants; a plague of grasshoppers. 4  any epidemic disease with a high death rate.
Plague is a zoonotic disease caused by the gram-negative bacteria Yersinia pestis. It is endemic (naturally occurring) on all continents except for Antarctica and Australia.neumonic plague can also develop secondary to the other types of plague and occurs when Y. pestis infects the lungs. Once in the lungs, Y. pestis is contagious and can spread to others through respiratory droplets, causing primary pneumonic plague.