Tratamento de helmintoses gastrintestinais de ovinos da raça Dorper em ambiente semiárido pela associação entre o fungo nematófago Duddingtonia flagrans e o Cloridrato de Levamisole 5%.

Abstract

The objective was to evaluate the action of D. flagrans pellets associated with strategic anthelmintic treatment with Levamisole Hydrochloride 5% in the control of sheep gastrointestinal nematodiosis in the Brazilian semiarid. Were used 18 Dorper sheep, females, aged between 24 and 36 months, mean weight of 50 kg. Were formed three groups consisting of six sheep. In group 1, each animal received 3g of the pellets (0.6g of D. flagransmycelium) for each 10 kg of body weight, twice a week for six months and a deworming with Levamisole Hydrochloride 5% each EPG ≥ 1500 ( Fugus + Chemical); in group 2, each animal received a dosage of levamisole hydrochloride with a 5 % when EPG ≥ 1,500 (Chemical); and group 3, each animal received 3g of pellets without fungi for each 10 kg of body weight, twice a week for six month , serving as Control group. Were realized EPG, larval cultures, PCV and weighing in the animals every 15 days. Monthly, samples of grass from each paddock were collected for quantification of L3/ kg D. M. The groups EPG mean began to statistically differ from day 30 (p<0.05 ). At day 180, the EPG mean of Fungus + Chemical group was 480, Chemical group was 1320 and Control group was 2340. The Fungus + Chemical group required less deworming with Levamisole Hydrochloride 5% % when OPG ≥ 1500 (p<0.05), only eight, Chemical group required 17. Haemonchus sp. was the most prevalent helminth gender in all larval culture. The Fungus + Chemical group showed superiority in PCV values throughout the experiment (p<0.05). There was a significant reduction (p< 0.05) in the recovery of L3 on pasture on the Fungus + Chemical paddock from day 30, peaking at day 180 with an average of 800 L3/ kg D.M. In conclusion, the use pellets of D. flagrans associated with strategic anthelmintic treatment with Levamisole Hydrochloride 5 % was effective in controlling gastrointestinal nematodiosis of sheep kept in irrigated pasture in the Brazilian semiarid region.