Production of dairy replacement stock in relation to level of exposure to gastrointestinal nematode infection in the first grazing season: Second-year calves and heifers

Ploeger, H.W.; Kloosterman, A.; Rietveld, F.W.; Hilderson, Hans; Berghen, P.; Pieke, Ej

doi:10.1016/0304-4017(96)00941-7

Cited by 12 publications

(3 citation statements)

References 12 publications

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“…Other reported effects of GI parasitism are alterations in the GI-tract motility, in GI secretions and in digestion and absorption (Fox, 1997). Ploeger et al (1996) observed that the infection-induced differences in weight gain during the first grazing season appeared to be permanent, at least up to the end of the second grazing season. Moreover, first-lactation yield was positively correlated with body weight at calving.…”

Section: Discussionmentioning

confidence: 99%

The association between Ostertagia ostertagi antibodies in bulk tank milk samples and parameters linked to cattle reproduction and mortality

Delafosse¹

2013

Veterinary Parasitology

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In Western Europe, gastrointestinal nematodes are widespread in dairy cattle. This study was carried out to evaluate the relationship between optical density ratio (ODR) measured on bulk tank milk with an indirect Ostertagia ostertagi ELISA and reproduction/mortality parameters. Data were collected between 2008 and 2010 from monitoring carried out on 1643 dairy herds (Normandy, Western France). ODR values of 3 samples from each farm taken from November 2008 to 2010 were averaged and then transformed into a categorical variable. Reproductive and mortality data were obtained from 1444 herds using cow records from government databases. Statistical analysis was carried out using ordinary logistic regression (OLR). The outcome variables were the case-control status of a herd for reproductive factors, age at first calving and inter-calving intervals, and mortality ratios of various age classes. The effect of the categorical ODR variable was studied and several potential confounder herd factors were used to improve the model fit. A significant relationship was found between high Ostertagia ODR levels and a late age at the first calving (>34.5 months) (odds ratio (OR)=1.94, p<0.001). No significant relationship was observed with OLR for inter-calving intervals although bivariate analysis showed that herds with high ODR levels had longer inter-calving intervals than herds with low ODR level (first inter-calving interval in herds with low vs. high ODR levels=412 days vs. 422 days, p<0.001; other inter-calving intervals=408 days vs. 413 days, p<0.01). A high ODR level was also associated with high mortality of calves between 0 and 30 days of life (mortality ratio>6%) (OR=1.43, p<0.05) and between 91 and 365 days (ratio>3%) (OR=1.72, p<0.01). No significant relationship was observed with multivariate approach for mortalities in other classes by age, but bivariate analysis showed that herds with high ODR level had higher mortalities than herds with low ODR levels (mortality between 31 and 90 days in herds with low vs. high ODR levels=1.89% vs. 2.91%, p<0.001; mortality after 365 days=1.67% vs. 2.93%, p<0.001). In conclusion, our results confirm the usefulness of ELISA as an indicator for production losses in dairy herds. This inexpensive tool could be advantageous, used to aid farmers and veterinarians to carry out appropriate control measures.

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Section: Discussionmentioning

confidence: 99%

The association between Ostertagia ostertagi antibodies in bulk tank milk samples and parameters linked to cattle reproduction and mortality

Delafosse¹

2013

Veterinary Parasitology

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“…Production losses are exacerbated when replacement stock are exposed to high loads of GIP (Marley et al 2010) leading to permanent growth deficit (Ploeger et al 1995) and increased culling (Mejı´a et al 2009). The most accepted methods available to treat parasitic infection in dairy herds are through the use of synthetic anthelmintic drugs.…”

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confidence: 99%

Short Communication: Birdsfoot trefoil as a preventative treatment for gastrointestinal nematodes in pastured dairy heifers

et al. 2015

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Shepley, E., Vasseur, E., Bergeron, R., Villeneuve, A. and Lachance, S. 2015. Short Communication: Birdsfoot trefoil as a preventative treatment for gastrointestinal nematodes in pastured dairy heifers. Can. J. Anim. Sci. 95: 533–537. Bioactive forages, such as birdsfoot trefoil, may serve as an alternative to anthelmintic drugs in pastured dairy heifers. Differences in parasite burden and growth were examined between eight treatment heifers fed a birdsfoot trefoil mixture and nine control heifer fed alfalfa silage 45-min per day for 12 wk. A significant 3.8- to 9.4-fold reduction in fecal egg counts was observed for treatment heifers at weeks 5, 9, 11 and 12. No treatment effect was found for weight gain. Our results suggest that birdsfoot trefoil may reduce parasite fecal egg counts in pastured dairy heifers without detrimental impact on growth.

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“…Ploeger and others (1990a,b) reported that if first‐year dairy calves had worm burdens which were too low there could be reduced growth in the second year and later reductions in milk yield. They have also suggested that parasites should not be controlled beyond a level at which weight loss is prevented (Ploeger and others 1996). In the present study, even though the farmers were asked to submit faecal samples at least three weeks after giving an anthelmintic, very few calves (18 per cent) had high nematode egg counts.…”

Section: Discussionmentioning

confidence: 99%

Nematode control practices and anthelmintic resistance in dairy calves in the south west of England

Stafford

Coles

1999

Veterinary Record

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A postal survey of worming practices on West Country dairy farms was undertaken and farmers were requested to send faecal samples for nematode egg counts. The majority of the farmers who responded had a nematode control policy which was based on a mixture of anthelmintics and pasture rotation. Sixty-five per cent turned out calves on to the same paddock each year and 57 per cent treated their stock with anthelmintics during the second year. Ninety farms submitted samples for analysis but only 16 samples contained sufficient eggs to justify repeat egg counts and only eight of these produced enough eggs for in vitro tests. The small number of positive samples, even into the latter part of the year suggests a heavy use of anthelmintics with relatively clean pasture. One Somerset farm had larvae which developed in high concentrations of ivermectin, and eggs were still being passed after two treatments with ivermectin at the manufacturer's recommended dose seven days apart. Of 100 male nematodes isolated from two of the calves, 88 were Cooperia species and 12 were Nematodirus species. A controlled trial with this isolate in eight Friesian male calves showed a 44 per cent reduction in egg counts at day 7 but no significant reduction in worm burden postmortem. This is the first reported case of ivermectin-resistant Cooperia species in cattle in the United Kingdom.

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Production of dairy replacement stock in relation to level of exposure to gastrointestinal nematode infection in the first grazing season: Second-year calves and heifers

Cited by 12 publications

References 12 publications

The association between Ostertagia ostertagi antibodies in bulk tank milk samples and parameters linked to cattle reproduction and mortality

The association between Ostertagia ostertagi antibodies in bulk tank milk samples and parameters linked to cattle reproduction and mortality

Short Communication: Birdsfoot trefoil as a preventative treatment for gastrointestinal nematodes in pastured dairy heifers

Nematode control practices and anthelmintic resistance in dairy calves in the south west of England

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