Use of a larval development assay to estimate anthelmintic efficacy in goats in smallholder farming systems

Issue Date

6-2003

Abstract

Resistance to benzimidazole anthelmintics was demonstrated in nematodes isolated from faeces of goats in 30 farms in the province of Nueva Ecija, Philippines. The average efficacy was 84% (range 7-100%). The method used to detect resistance was a larval development assay modified from a commercialized research tool, Drenchrite, Faeces were collected from the rectum of each goat or from the ground after collecting groups of goats in a yard or in a shed with slatted floor. Information on herd size, management practices and deworming procedures were obtained from a survey of goat owners. Herd sizes ranged from 3 to 72 goats. No other management or deworming factors were significantly associated with efficacy based on results of the larval development assay. Species belonging to Haemonchus and Trichostrongylus were the most numerous genera present in the faecal samples. Haemonchus tended to be present in higher numbers among the resistant larvae found on the assay plates.

Source or Periodical Title

Philippine Agricultural Scientist, The (Formerly: The Philippine Agriculturist)

ISSN

0031-7454

Volume

86

Issue

2

Page

134-139

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Frequency

quarterly

Physical Description

tables; references

Language

English

Subject

benzimidazole, efficacy, goats, larval development assay, nematode

En – AGROVOC descriptors

ANTHELMINTICS; BENZIMIDAZOLES; NEMATODES; LARVAE; LARVAL STAGE; FAECES; GOATS; SMALL-SCALE FARMING

This document is currently not available here.

Share

COinS