Survey on anthelmintic resistance to gastrointestinal nematodes in unorganized goat farms of Tamil Nadu
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Date
2015-04
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Abstract
One of the major problems in small ruminant
farms is emergence of anthelmintic resistance (AR) to
commonly used dewormers. This study investigated AR to
gastrointestinal nematodes affecting goats in 27 unorganized
farms in three different agro-climatic zones (Cauvery delta
zone, high altitude zone and high rainfall zone) of Tamil
Nadu, India. Two anthelmintics viz., albendazole (AZ) and
levamisole (LEV) were used in this study as per the dose
recommended by the manufacturer. Status of AR was
detected by using the faecal egg count reduction test. Results
revealed the presence of high level of resistance to both AZ
and LEV. In the high rainfall and high altitude zones, all the
farm flocks were found to be resistant to LEV. In the Cauvery
delta zone, 13 farm flocks were resistant and four farm flocks
showed suspect resistance to AZ. Fifteen farm flocks showed
resistance and two showed suspect resistance to LEV. Further,
morphological characterization of the infective larvae
derived from faecal cultures indicated that by far the most
predominant gastrointestinal nematode species found in
goats was Haemonchus contortus.
Description
TNV_JPD_2015_39(2)258-261
Keywords
Veterinary Science