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Status of anthelmintic resistance in gastrointestinal nematodes of sheep in Rajasthan*

Indian Agricultural Research Journals

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Title Status of anthelmintic resistance in gastrointestinal nematodes of sheep in Rajasthan*
 
Creator MAHARSHI, A K
SWARNKAR, C P
SINGH, D
MANOHAR, G S
AYUB, M
 
Subject Anthelmintic resistance; Benzimidazole; Egg hatch assay; Faecal egg count reduction test;Haemonchus contortus; Tetramisole
 
Description A study was conducted to assess the status of anthelmintic resistance in gastrointestinal nematodes (predominantly Haemonchus contortus) of sheep maintained at organized farms and farmer’s field in Rajasthan through in-vivo faecal egg count reduction test and in-vitro egg hatch assay. The magnitude of reduction in the faecal egg counts by fenbendazole (@ 5.0 mg kg-1 body weight) revealed emergence of benzimidazole resistance in H. contortus of sheep from all the farm and field flocks except in field flocks from north-eastern Rajasthan where 66.7% flocks possessed benzimidazoleresistant H. contortus. With tetramisole (@ 15 mg kg-1 body weight) resistance in H. contortus was observed in farm flock of north-eastern region whereas among field flocks it ranged from 33.33% (north region) to 83.33% (eastern region). On egg hatch assay, strains of worms were found susceptible to benzimidazole in farm flocks of northern region while in field flocks prevalence of benzimidazole resistance strongyle worms was 100% in eastern and northern region and 83.33% in north-eastern region. A high agreement (86.4%) with poor linear correlation (r = 0.087) was observed between results of both faecal egg count reduction test and egg hatch assay for benzimidazole resistance.
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2011-02-09
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/4011
 
Source The Indian Journal of Animal Sciences; Vol 81, No 2 (2011)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/4011/1592
 
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