Ipomoea asarifolia is one of the main poisonous plants in the North and Northeast of Brazil. The poisoning occurs during the dry season when there is shortage of forage, and is more common in sheep; however spontaneous cases are also reported in goats, cattle and buffaloes. This paper reports 18 outbreaks of poisoning in cattle by I. asarifolia which occurred from August 2012 to February 2013 in the state of Rio Grande do Norte. From a total of 1,704 cattle, 202 (11.8%) were affected and 34 (2%) died. On six farms sheep were also affected. Poisoning outbreaks were also observed in lambs and calves that had no access to the pastures but suckled milk from cows and ewes that had ingested I. asarifolia.
Poisonous plants; Ipomoea asarifolia; Covolvulaceae; intention tremors; tremorgenic toxins; plant poisoning; cattle; sheep
