BEZERRA, C. W. C.; http://lattes.cnpq.br/8924525111044684; BEZERRA, Cícero Wanderlô Casimiro.
Resumo:
A survey on toxic plants for ruminants and equidae was performed on the municipalities of Juazeiro do Norte, Crato, Barbalha, and Missão Velha on the Ceará state, Northeastern Brazil. Twenty one
interviews were realized with farmers, veterinary practitioners, agronomists and agriculture technicians.
Poisonings by Ipomoea asarifolia mentioned in 38% and 19% interviews as toxic for bovines and sheep,
respectively, and Enterolobium contotisiliquum, mentioned as toxic for cattle (47.6% of the interviews) and
sheep (4.7%), were more frequent. Also occur in the region poisonings by Mascagnia rigida (38% of the
interviews), Anadenanthera colubrina var. cebil (=A. macrocarpa) (14%), Ricinus communis (14%), Thiloa
glaucocarpa (9%), and Sorghum halepense (4%) in cattle, Mimosa tenuiflora in cattle, sheep, and goats
(38%), Brachiaria decumbens in sheep and cattle (38%), Manihot spp. in cattle and goats (28% ), and
Leucaena leucocephala in sheep and horses (4%). Several plants previously unknown as toxic, but
mentioned by the respondents as poisonous, were given to experimental animals at different doses. Only
Casearia commersoniana was toxic to goats at the daily doses of 20g kg-1 body weight during 2-4 days.
Clinical signs, similar to those reported by the farmers, were stiffness, mild bloat, polaquiuria, vocalization,
jugular engorgement and pulsation, swaying gait, falling, spasticity, paddling movements, opisthotonos, and
tachyicardia and dyspnea followed by bradycardia and bradypnea. Deaths occurred 6 and 19 hours after
first clinical signs. No significant gross or histologic lesions were observed. It is concluded that poisonings by plants are important cause of losses in the region, which has a population of 53,473 bovines, 4,799 goats, 9,149 sheep, and 7,060 equidae.