Abstract
ABSTRACT This study was conducted to investigate the effect of Aloe veragel and Yucca schidigeraextract supplementation on growth performance,oocyst shedding,intestinal lesions and inflammatory response in broilers challenged with coccidia. Two hundred and ten, one-day old Cobb chicks were randomly allocated to seven equal groups (30 birds/group).(G1): non-infected non-treated group, (G2): infected non-treated group,(G3)&(G4): infected and treated with Aloeveragel 5gm/L and Yucca schidigeraextract 200 mg/ L respectively from 7th day of age till the end of the experiment, (G5)&(G6): infected and treated with Aloe veragel 5gm/L andYucca schidigeraextract 200 mg/L respectively from 15th day of age till the end of the experiment and (G7): infected and treated with Amprolium 1g/ 2 L from 15th day for five successive days.Chickens in infected groups were challenged with 50,000sporulatedoocysts of field strain of Eimeria spp. on the 14th days of age. The average body weight gains, feed intake and feed conversion ratio were recorded all over the experimental period. The anticoccidial evaluation post infection depended on severity of bloody diarrhea, lesion scores as well as the oocyst shedding. In addition, histopathological changes in intestine and serum level of inflammatory cytokines were evaluated. Aloe veragel and Yucca schidigeraextract supplementation were able to mitigate the devastating effects of coccidia challenge in broilers.Growth performances represented by bodyweight gain, and feed conversion ratio were significantly improved.The Lesion score and oocysts shedding were significantly reduced as well as the serum level of pro-inflammatory (IL-6 and IL-1β) were significantly down regulated in challenged treated groups. The histopathological changes of intestine were ameliorated in treated supplemented groups. In conclusion, Aloe verageland Yucca schidigeraextract can be a promising candidate to be used as a natural, low cost alternative to control coccidiosis in chickens.
Highlights
Avian coccidiosis is one of the most economically important protozoan diseases in the broiler, caused by genus Eimeria. (Noack et al, 2019)
Chemoprophylaxis and anticoccidial feed additives have long been used as the main strategy to control avian coccidiosis .the development of Eimeria strains resistance to multiple drugs and residues in poultry products may be potentially hazardous to consumers have made increasing interest for alternative products to control coccidiosis (Cervantes 2015)
Our results showed that yucca schidigera extract and Aloe vera gel significantly reduced the intestinal lesion as compared to positive control group
Summary
Avian coccidiosis is one of the most economically important protozoan diseases in the broiler, caused by genus Eimeria. (Noack et al, 2019). Avian coccidiosis is one of the most economically important protozoan diseases in the broiler, caused by genus Eimeria. It cause economic losses due to increase costs of treatment and prophylaxis. In a subclinical form, it may cause immunosuppression that makes the bird more vulnerable to secondary disease conditions (Akhtar et al, 2012). Chemoprophylaxis and anticoccidial feed additives have long been used as the main strategy to control avian coccidiosis .the development of Eimeria strains resistance to multiple drugs and residues in poultry products may be potentially hazardous to consumers have made increasing interest for alternative products to control coccidiosis (Cervantes 2015). One of the ways, using botanicals in the control of avian coccidiosis, as they are novel natural products contains new therapeutic molecules to which immunity has not yet developed
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