| 
              
              
              Open Access  
 
              
              
              
              Research 
              
              
(Published 
				online: 
				31-01-2016)  
              
              17. 
				
				Anthelmintic activity of 
				
				Indigofera tinctoria 
				
				against gastrointestinal nematodes of 
				sheep - 
				
				Ambalathaduvar Meenakshisundaram, Tirunelveli Jayagopal 
				Harikrishnan and Thavasi Anna 
              
              Veterinary World, 9(1): 101-106   
              
   
                
                
doi: 
              
				
				10.14202/vetworld.2016.101-106 
                
				  
				
				Ambalathaduvar Meenakshisundaram: 
				
				Department of Veterinary Parasitology, Veterinary College and 
				Research Institute,  
				
				Tirunelveli - 627 358, Tamil Nadu, India; fish1092@rediffmail.com 
				
				Tirunelveli Jayagopal Harikrishnan: 
				
				Registrar, Tamil Nadu Veterinary and Animal Sciences University, 
				Chennai - 600051, Tamil Nadu, India; tjkrish@gmail.com 
				
				Thavasi Anna: 
				
				Department of Veterinary Parasitology, Veterinary College and 
				Research Institute, Tirunelveli - 627 358, Tamil Nadu, India; 
				drtanna@rediffmail.com   
				
				Received: 15-08-2015, Revised: 08-12-2015, Accepted: 18-12-2015, 
				Published online: 31-01-2016 
				  
				
              	
              	Corresponding author:Ambalathaduvar
              	Meenakshisundaram, e-mail: fish1092@rediffmail.com 
 
              Citation: 
				
				Meenakshisundaram A, Harikrishnan TJ, Anna T (2016), 
				Anthelmintic activity of 
				
				Indigofera tinctoria 
				
				against gastrointestinal nematodes of sheep, 
				
				Veterinary World 
				
				9(1): 101-106. 
 
              
				Abstract 
 
				
				
				Aim: 
				
				Gastrointestinal (GI) nematodes are considered as a major 
				constraint for successful sheep production. Control of these 
				parasites heavily relies on the use of chemical anthelmintics. 
				Over the past decades, the development of anthelmintic 
				resistance to various groups of anthelmintics and problem of 
				drug residues in animal products has awakened interest in 
				medicinal plants as an alternative source of anthelmintics. 
				Hence, this study was undertaken to evaluate the anthelmintic 
				efficacy of 
				
				Indigofera tinctoria 
				
				by scientifically validated 
				
				in vitro 
				
				and 
				
				in vivo 
				
				tests approved by the World Association for the Advancement of 
				Veterinary Parasitology. 
				
				
				Materials and Methods: 
				
				In vitro 
				
				assays such as egg hatch assay for ovicidal and larval migration 
				inhibition and larval development assay for larvicidal 
				properties were used to investigate 
				
				in vitro 
				
				effect of extracts on strongyle egg and larvae, respectively. 
				Fecal egg count reduction test was conducted 
				
				in vivo 
				
				to evaluate the therapeutic efficacy of the extracts 
				administered orally at dose rates of 125, 250, 500 mg/kg to 
				sheep naturally infected with mixed GI nematodes. 
				
				
				Results: 
				
				Ethanolic extract of 
				
				I. tinctoria 
				
				demonstrated significant (p<0.01) inhibition on egg hatching at 
				concentrations of 40 mg/ml and 80 mg/ml. In 
				
				in vivo 
				
				assay, the ethanolic extract of 
				
				I. tinctoria 
				
				reduced the fecal egg count ranging between 30.82% and 47.78% at 
				various doses (125, 250 and 500 mg/kg). Although there was a 
				slight variation, all the hematological parameters were within 
				the normal range reported for sheep. Except for alanine 
				transaminase, the overall mean of all the serum biochemical 
				profile was within the normal range for sheep. 
				
				
				Conclusion: 
				
				Based on the results obtained by 
				
				in vitro 
				
				and 
				
				in vivo 
				
				assay, the ethanolic extract of 
				
				I. tinctoria 
				
				possesses anthelmintic activity and could replace the chemical 
				anthelmintics used presently. 
				
				
				Keywords: 
				
				anthelmintic, evaluation, gastrointestinalnematodes, 
				
				Indigofera tinctoria, 
				sheep. 
 
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