1. Wattle tannins as control strategy for gastrointestinal nematodes in sheep
- Author
-
Nsahlai Ignatius Verla, Basha Nasreldin Abdelrahim, and Ahmed Mawahib Alhag
- Subjects
chemistry.chemical_classification ,geography ,geography.geographical_feature_category ,biology ,Live weight ,biology.organism_classification ,Pasture ,Wattle (anatomy) ,Animal science ,Nematode ,chemistry ,Botany ,medicine ,Small ruminant ,Tannin ,Anthelmintic ,General Agricultural and Biological Sciences ,Dosing Frequency ,medicine.drug - Abstract
Nematode resistance to anthelmintic drugs is affecting small ruminant production in South Africa. This study evaluated the effect of wattle tannins as an alternative nematode control drench. Two experiments (Exp) were conducted to determine the effect of tannin concentration (Exp 1) and frequency of dosing (Exp 2) on nematode parasites. In each experiment gender, egg count (egg per gram, EPG) and initial live weight aided in blocking sheep into groups, within which they were randomly allocated to and drenched with different tannin treatments. In experiment one, 24 sheep (16 females and 8 males, aged 8-9 months) were placed into four treatment: 0, 0.8, 1.6 and 2.4 g tannin/kg BW; they were drenched for three consecutive days in a study that lasted for 21 days. In Experiment 2, 26 sheep (11 males and 15 females aged 9 to 18 months) were placed into three treatments of 9, 9, and 8 sheep each. These treatments were drenched with 1.6 g tannins/kg BW/day for one day, two or three days for the three treatments, respectively. For the two experiments, EPG were counted and L3 larvae cultured and counted in individual feacal samples. In Exp one, for all tannin treatments, EPG decreased (P
- Published
- 2014