Association between Dictyocaulus viviparus status and milk production parameters in Dutch dairy herds

Dank, M.; Holzhauer, M.; Veldhuis, Anouk; Frankena, K.

doi:10.3168/jds.2015-9408

Cited by 17 publications

(16 citation statements)

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“…Previous studies have shown a significant negative association between D. viviparus antibody levels and total milk production in dairy herds based on BTM ELISA results [ 14 , 15 ]. However, data on the relationship between patent D. viviparus infections determined by faecal examinations and daily milk production in individual dairy cows are lacking.…”

Section: Discussionmentioning

confidence: 99%

“…Holzhauer et al [ 5 ] reported considerable economic losses in two lungworm-infected Dutch dairy herds, such as a decrease in milk production, with estimated costs between 160 and 170 € per cow during a lungworm outbreak. The first herd-level evaluation of the relationship between D. viviparus infections and milk production parameters (milk yield, milk protein content, milk fat content) assessed by BTM ELISA was conducted by Dank et al [ 14 ]. In this study, D. viviparus positive herds showed a decline in milk production between 1.01 and 1.68 kg/cow/day, and lower milk fat content in comparison to herds with a negative BTM ELISA result.…”

Section: Introductionmentioning

confidence: 99%

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The effect of patent Dictyocaulus viviparus (re)infections on individual milk yield and milk quality in pastured dairy cows and correlation with clinical signs

et al. 2018

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BackgroundInfections with the bovine lungworm Dictyocaulus viviparus might lead to reduced milk production and detrimental impacts on milk quality resulting in considerable economic losses in dairy farming.MethodsIn the presented field study, 1988 faecal samples were collected from 1166 Black and White dairy cows allocated in 17 small and medium-sized German grassland farms. Faecal samples were collected in summer and autumn 2015 to assess D. viviparus larvae excretion. Test-day records were used to estimate the association between patent D. viviparus infections in individual cows and the milk production parameters milk yield, milk protein and milk fat content by using linear mixed models. Bulk tank milk (BTM) samples from each farm and individual milk samples from those cows which were excreting larvae in summer were collected in autumn. In addition, occurrence of the clinical symptom “coughing” was noted in individual cows during autumn sampling to determine its association with patent lungworm infections.ResultsPatent D. viviparus infections were found on 23.5% (4/17) of farms with a prevalence at the individual cow level of 0.9% (9/960) in summer and 3.4% (35/1028) in autumn. No BTM sample exceeded the BTM ELISA cut-off value of 0.410 optical density ratio (ODR), the mean value was 0.168 ODR. Only one individual milk sample exceeded the individual milk ELISA cut-off value of 0.573 ODR (mean value of 0.302 ODR). A patent D. viviparus infection status was associated with a lower average daily milk yield of 1.62 kg/cow/day (P = 0.0406). No significant association was found with milk protein or fat content representing milk quality parameters. Coughing was observed in 5.9% (61/1028) of cows. Of the coughing cows, only 4.9% (3/61) had a patent lungworm infection. Fisher’s exact test showed no significant difference between infected and non-infected coughing cows.ConclusionsFarmers and veterinarians should be aware that patent lungworm (re)infections in dairy cows reduce milk yield, despite the absence of clinical signs. Furthermore, if dairy cows present with coughing, other differential diagnoses need to be considered in addition to dictyocaulosis.Electronic supplementary materialThe online version of this article (10.1186/s13071-017-2602-x) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of patent Dictyocaulus viviparus (re)infections on individual milk yield and milk quality in pastured dairy cows and correlation with clinical signs

et al. 2018

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“…For the susceptibility to liver fluke, McClure et al (2014) reported a heritability of 0.15 for dairy cattle in Ireland. Moreover, infections and reinfections with the bovine lungworm are of economic importance in dairy cattle herds (Holzhauer et al, 2011;Dank et al, 2015), but not addressed in quantitative-genetic studies.…”

Section: Introductionmentioning

confidence: 99%

Genetic line comparisons and genetic parameters for endoparasite infections and test-day milk production traits

May

Brügemann

Yin

et al. 2017

Journal of Dairy Science

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Keeping dairy cows in grassland systems relies on detailed analyses of genetic resistance against endoparasite infections, including between- and within-breed genetic evaluations. The objectives of this study were (1) to compare different Black and White dairy cattle selection lines for endoparasite infections and (2) the estimation of genetic (co)variance components for endoparasite and test-day milk production traits within the Black and White cattle population. A total of 2,006 fecal samples were taken during 2 farm visits in summer and autumn 2015 from 1,166 cows kept in 17 small- and medium-scale organic and conventional German grassland farms. Fecal egg counts were determined for gastrointestinal nematodes (FEC-GIN) and flukes (FEC-FLU), and fecal larvae counts for the bovine lungworm Dictyocaulus viviparus (FLC-DV). The lowest values for gastrointestinal nematode infections were identified for genetic lines adopted to pasture-based production systems, especially selection lines from New Zealand. Heritabilities were low for FEC-GIN (0.05-0.06 ± 0.04) and FLC-DV (0.05 ± 0.04), but moderate for FEC-FLU (0.33 ± 0.06). Almost identical heritabilities were estimated for different endoparasite trait transformations (log-transformation, square root). The genetic correlation between FEC-GIN and FLC-DV was 1.00 ± 0.60, slightly negative between FEC-GIN and FEC-FLU (-0.10 ± 0.27), and close to zero between FLC-DV and FEC-FLU (0.03 ± 0.30). Random regression test-day models on a continuous time scale [days in milk (DIM)] were applied to estimate genetic relationships between endoparasite and longitudinal test-day production traits. Genetic correlations were negative between FEC-GIN and milk yield (MY) until DIM 85, and between FEC-FLU and MY until DIM 215. Genetic correlations between FLC-DV and MY were negative throughout lactation, indicating improved disease resistance for high-productivity cows. Genetic relationships between FEC-GIN and FEC-FLU with milk protein content were negative for all DIM. Apart from the very early and very late lactation stage, genetic correlations between FEC-GIN and milk fat content were negative, whereas they were positive for FEC-FLU. Genetic correlations between FEC-GIN and somatic cell score were positive, indicating similar genetic mechanisms for susceptibility to udder and endoparasite infections. The moderate heritabilities for FEC-FLU suggest inclusion of FEC-FLU into overall organic dairy cattle breeding goals to achieve long-term selection response for disease resistance.

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“…This pattern is evident in surveys based on bulk milk tank testing for antibodies to various helminth parasites in dairy herds (Bennema et al, 2009;Bloemhoff et al, 2015;Frey et al, 2018). This makes it difficult to attribute observed reductions in milk yield to either lungworm or O. ostertagi -or both (Dank et al, 2015). Under experimental conditions in naïve calves, co-infections with Ostertagia ostertagi and Cooperia oncophora result in a more profound impact from dictyocaulosis, manifest as higher establishment of lungworm burdens and increased larval shedding (Figure 6), compared to mono-infections with D. viviparus alone (Kloosterman et al, 1989).…”

Section: Helminth Co-infectionsmentioning

confidence: 99%

Lungworm in cattle: epidemiology, pathology and immunobiology

Forbes

2018

Livestock

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The bovine lungworm, Dictyocaulus viviparus, causes disease in all ages of cattle and in addition to having a self-evident effect on animal welfare, it can have a considerable economic impact at farm level, even with subclinical infections. Whilst most clinical cases are seen in cattle at pasture from July until housing, occasional outbreaks occur in housed cattle that have been infected previously at grass, or occasionally from infections acquired from forage or low-level cycling in straw yards. Whilst the overall seasonal pattern of infection is consistent over large temporal and spatial scales, there is marked year-to-year and within season variability in the number of cases seen at both regional and farm levels. This relative unpredictability can bring uncertainty to decisions on control. In order to be able to provide sound, evidence-based advice on treatment and control to farmers, it is important that clinicians grasp important, practically relevant aspects of lungworm biology, pathology, immunity and epidemiology: the aim of this article is to do just that. A second article describes and analyses the options for prevention and treatment of husk, based on this knowledge.

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Association between Dictyocaulus viviparus status and milk production parameters in Dutch dairy herds

Cited by 17 publications

References 19 publications

The effect of patent Dictyocaulus viviparus (re)infections on individual milk yield and milk quality in pastured dairy cows and correlation with clinical signs

The effect of patent Dictyocaulus viviparus (re)infections on individual milk yield and milk quality in pastured dairy cows and correlation with clinical signs

Genetic line comparisons and genetic parameters for endoparasite infections and test-day milk production traits

Lungworm in cattle: epidemiology, pathology and immunobiology

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