Returns from strategic anthelmintic treatments in village cattle in the Gambia

Itty, P.; Zinsstag, Jakob; Ankers, P.; Njie, M.

doi:10.1016/s0167-5877(97)00033-0

Cited by 10 publications

(11 citation statements)

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“…They are related to an average benefit-cost ratio of 1.14 for the intervention (implying borderline profitability) [8]. The estimates obtained from the GEE model confirmed the trends observed in overall descriptive plots in Figure 1.…”

Section: Discussionsupporting

confidence: 76%

“…For this, liveweight and calving rates were regressed on predicted FEC levels. In the same way, profitability of deworming, expressed as the benefit-cost ratio from Itty et al [8] were correlated with the Poisson predicted FEC. Although the treatment had highly significant effects on both FEC and productivity measures [24,25], the herd level FECs were not significantly correlated with herd level productivity measures such as calving rates and body weights (data not shown).…”

Section: Discussionmentioning

confidence: 95%

“…kg -1 BW) treatments increase liveweights of one to four year old animals between 8 and 17% [24], reduce age at first calving by 8 months (25% of age at first calving) and increase calving rates by 8%, but do not influence mortality [25]. These results and financial data on treatment costs were used in a herd simulation model to assess the profitability of the intervention by the method of Itty et al [8]. The bioeconomic herd model used simulates whole herd productivity, derived from averaged observational data, over a ten year period, including discounting.…”

Section: Introductionmentioning

confidence: 99%

“…nématodes gastrointestinaux / bovins N'Dama / coprologie / vermifugation ciblée / fenbendazole (Benefit-cost ratio = 1.14) but highly variable between herds. The treatment scheme can only be recommended in certain herds and further research is needed to identify the factors determining the large between herd variation of returns [8]. One reason for the variability of returns to anthelmintic treatment might be the variation of nematode burden on the herd level.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we present the effect of strategic anthelmintic treatments on Trichostrongyle faecal egg counts (FEC) in the above study [8,24,25] together with important determinants of FEC, such as age and season.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of strategic gastrointestinal nematode control on faecal egg count in traditional west African cattle

Zinsstag

Ankers²,

Njie

et al. 2000

Vet. Res.

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-This paper reports on the effect of strategic anthelmintic treatments and other determinants on faecal egg counts (FEC) of Trichostrongyles in N'Dama cattle of a west African village. Initially, 527 animals from 13 private N'Dama cattle herds were monitored in a longitudinal study from October 1989 to December 1994. Each herd was stratified by age and animals were sequentially allocated to two groups with similar age distributions. One group received a single anthelmintic treatment of fenbendazole (7.5 mg/kg BW), in October 1989 (n = 250), whereas the other group remained untreated (n = 277) throughout the study. In the next rainy season (June to October), the treated animals were treated twice (in July and September). The same treatment schedule was used in the subsequent rainy seasons until December 1994. Biannual anthelmintic treatments decreased the level of FEC between 31% (late dry season) and 57% (rainy season), when compared to untreated controls. The highest levels of FEC were found during the rainy season from June to October. FEC levels decreased until 4 years of age, after which they remained on a constant low level. The variability of returns to anthelmintic treatments between herds did not seem to be influenced by FEC at the herd level. The financial evaluation of anthelmintic interventions cannot be predicted from FEC and must necessarily rely on the direct monitoring of livestock productivity parameters.gastrointestinal nematodes / N'Dama cattle / faecal egg count / strategic control / fenbendazole Vet. Res. 31 (2000) 259-266 259

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Section: Discussionsupporting

confidence: 76%