title: Effect of strategic deworming of village cattle in Uganda with moxidectin pour-on on faecal egg count and pasture larval counts.
abstract: Strategic application of moxidectin pour-on (Cydectin) was evaluated in Uganda for its effect on pasture larval counts and gastrointestinal nematode faecal egg counts in village cattle kept under tethering (semi-intensive) grazing management. The strategic deworming schedule involved treating cattle twice at an interval of 2 months, at the end of the 1st wet season and during the 2nd wet season. Two groups of 30 cattle, each consisting of a treated and a control group, were examined for nematode infections every 4 weeks from June 1999 to January 2000. The treated group had significantly lower mean faecal egg counts than the untreated groups (t-value = 2.47, P < 0.05). Generally, the pasture larval counts on treated farms were lower than on untreated ones, but not significantly so (t-value = 2.22, P = 0.068). Pasture larval counts with different nematode species on treated farms were lower than on untreated ones, but the differences were not significant for Haemonchus spp. (t-value = 1.68, P = 0.145), Oesophagostomum spp. (t-value = 1.87, P = 0.111), Trichostrongylus spp. (t-value = 1.93, P = 0.102), Dictyocaulus spp. (t-value = -0.74, P = 0.485) and Cooperia spp. (t-value = -1.00, P = 0.356). Treated farms did, however, have significantly lower pasture larval counts of Bunostomum spp. (t-value = 4.64, P < 0.05). This study has revealed that the application of moxidectin pour-on on cattle has an effect on faecal egg count and pasture contamination under the tethering grazing system. Moxidectin pour-on and the strategic deworming schedule evaluated here could be used for the control of gastrointestinal nematode infections in cattle by small-scale farmers who practise tethering or semi-intensive grazing management in Uganda and other tropical countries, especially where there is a bimodal rainfall pattern.
authors.affiliation: Livestock Health Research Institute, PO Box 96, Tororo, Uganda. liridir@hotmail.com
authors.forename: J W
authors.initials: JW
authors.lastname: Magona
authors.forename: G
authors.initials: G
authors.lastname: Musisi
authors.forename: J
authors.initials: J
authors.lastname: Walubengo
authors.forename: W
authors.initials: W
authors.lastname: Olaho-Mukani
mesh_terms: D000818:Animals; D000969:Antinematodal Agents / Q000008:administration & dosage* / Q000494:pharmacology; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy* / Q000453:epidemiology; D005243:Feces / Q000469:parasitology*; D007814:Larva; D018942:Macrolides / Q000008:administration & dosage* / Q000494:pharmacology; D009348:Nematoda / Q000187:drug effects*; D009349:Nematode Infections / Q000188:drug therapy / Q000453:epidemiology / Q000662:veterinary*; D010270:Parasite Egg Count / Q000662:veterinary; D011897:Random Allocation; D012621:Seasons; D013045:Species Specificity; D016896:Treatment Outcome; D014454:Uganda / Q000453:epidemiology
chemical_list: D000969:Antinematodal Agents; D018942:Macrolides; C027837:moxidectin