de Almeida, Gustavo Fonseca2; Thamsborg, Stig Milan8; Madeira, Alda M. B. N.3; Ferreira, Jorge F. S .4; Magalhães, Pedro M .5; Filho, Luiz C. Dematté3; Horsted, Klaus6; Hermansen, John Erik7
1 Parasitology and Aquatic Diseases, Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, Københavns Universitet2 Produktionssystemer3 University of São Paulo State4 Agricultural Research Service5 University of Campinas6 DCA - Nationalt Center for Fødevarer og Jordbrug7 Institut for Agroøkologi - Jordbrugsproduktion og Bæredygtighed8 Parasitology and Aquatic Diseases, Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, Københavns Universitet
Due to an increasing demand for natural products to control coccidiosis in broilers, we investigated the effects of supplementing a combination of ethanolic extracts of Artemisia annua and Curcuma longa in drinking water. Three different dosages of this herbal mixture were compared with a negative control (uninfected), a positive control (infected and untreated), chemical coccidiostats (nicarbazin+narazin and, later, salinomycin), vaccination, and a product based on oregano. Differences in performance (weight gain, feed intake, and feed conversion rate), mortality, gross intestinal lesions and oocyst excretion were investigated. Broilers given chemical coccidiostats performed better than all other groups. Broilers given the two highest dosages of the herbal mixture had intermediate lesion scores caused by Eimeria acervulina, which was higher than in broilers given coccidiostats, but less than in broilers given vaccination, oregano and in negative controls. There was a trend for lower mortality (P = 0·08) in the later stage of the growing period (23–43 days) in broilers given the highest dosage of herbal mixture compared with broilers given chemical coccidiostats. In conclusion, the delivery strategy of the herbal extracts is easy to implement at farm level, but further studies on dose levels and modes of action are needed.
Parasitology (cambridge), 2014, Vol 141, Issue 3, p. 347-355