Short Communication

Anthelmintic resistance of nematodes in communally grazed goats in a semi-arid area of South Africa

F.R. Bakunzi
Journal of the South African Veterinary Association | Vol 74, No 3 | a516 | DOI: https://doi.org/10.4102/jsava.v74i3.516 | © 2003 F.R. Bakunzi | This work is licensed under CC Attribution 4.0
Submitted: 02 July 2003 | Published: 02 July 2003

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F.R. Bakunzi,

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Abstract

A survey was conducted on the occurrence of anthelmintic resistance of nematodes in communally grazed goats in a semi-arid area in SouthAfrica. In herds belonging to 10 smallholder goat farmers, the efficacies of fenbendazole, levamisole and rafoxanide were tested by faecal egg count reduction (FECR) tests. Efficacies of 80 % were considered a threshold for anthelmintic resistance. The FECR tests showed that all drugs tested more than 80 % effective in most instances, but there were notable exceptions. In 1 case, rafoxanide was only 31 % effective and in another case fenbendazole was only 47 % effective. The occurrence of anthelmintic resistance in this farming sector is of concern. Steps should be taken to prevent its further spread and to avoid the development of a situation as onnumerous commercial sheep farms in South Africa where resistance is very common.

Keywords

Communal Grazing; Drug Resistance; Fenbendazole; Goats; Levamisole; Nematodes; Rafoxanide; South Africa

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