The use of bulk-tank milk ELISAs to assess the spatial distribution of Fasciola hepatica, Ostertagia ostertagi and Dictyocaulus viviparus in dairy cattle in Flanders (Belgium)

Bennema, Sita; Vercruysse, Jozef; Claerebout, Edwin; Schnieder, Thomas; Strübe, Christina; Ducheyne, Els; Hendrickx, Guy; Charlier, Johannes

doi:10.1016/j.vetpar.2009.07.006

Cited by 90 publications

(75 citation statements)

References 26 publications

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“…Belgium 37% (Bennema et al, 2009), UK 48-72% (Salimi-Bejestani et al, 2005McCann et al, 2010), Portugal 11-42% (Conceicao et al, 2004, Germany 24% (Kuerpick et al, 2013) and Spain 20% (Sanchez-Andrade et al, 2002). In contrast, it is much higher than that reported in a previous Swedish study in 2008, when only 7% of 205 herds were infected (Höglund et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…It has been shown that significant production losses occur in herds with a prevalence of F. hepatica infection of 25% or higher (Vercruysse and Claerebout, 2001). Detection of antibodies to liver fluke by the enzyme-linked immunosorbent assay (ELISA) in bulk tank milk (BTM) samples (Duscher et al, 2011) is currently the most common method for F. hepatica diagnosis in dairy production at the herd level (Forbes and Charlier, 2006;Charlier et al, 2007Charlier et al, , 2011Charlier et al, , 2014Salimi-Bejestani et al, 2007;Bennema et al, 2009). The simplicity of BTM collection provides an easy tool for spatial liver fluke screening at different regional scales.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of Fasciola hepatica in Swedish dairy cattle and associations with pasture management factors

2015

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Abstract. The geographic distribution of Fasciola hepatica infection in relation to management routines was studied in Swedish dairy herds by testing for F. hepatica antibodies with the enzyme-linked immunosorbent assay (ELISA). In addition, all farmers were sent a questionnaire asking for information about type of production, management routines and historical record of F. hepatica at slaughter. A total of 176 farmers (41%) responded to the questionnaire. A total of 426 bulk tank milk (BTM) samples were randomly selected from the period September to October 2012 representing approximately 10% of all herds in Sweden. The overall seroprevalence was 25% (n = 107; 95% confidence interval = 21-29%) with a concentration of herds located in south-western Sweden. Among the seropositive herds, 31 (29%) had antibody levels indicating production loss. There were no significant differences in seropositivity between organic and conventional herds or due to pasture management routines. The length of grazing period, which increased the risk for heifers, was found to be the most influential factor. A discrepancy was noted between reported F. hepatica presence at meat inspection and herds that were seropositive based on BTM-ELISA results. Although the largest proportion of seropositive BTM samples (80%) came from herds where liver fluke presence had been observed at meat inspection after slaughter, seropositive BTM samples were also diagnosed in five herds (17%) with no remarks at slaughter. In conclusion, F. hepatica is a common parasite in Swedish dairy herds and the month of heifer turn-out and the grazing period length were the most influential factors observed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution of Fasciola hepatica in Swedish dairy cattle and associations with pasture management factors

2015

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“…Based on results from a large-scale study, farms with and without liver flukes can co-exist next to each other within a high infection risk zone (Bennema et al, 2009). Inclusion of fine-scale information on vector habitats and farm management could reveal an explanation for this pattern.…”

Section: Discussionmentioning

confidence: 99%

“…The landscape is characterised by being a coastal region situated in the temperate climate zone that receives on average about 800 mm rain per year (KMI, ). Importantly, the area is also characterized by a high level of liver fluke infection with significant economic losses due to diminished milk production: the yearly cost for Flanders is estimated at 8.2 million € or about 30 € per adult cow per year (Charlier et al, 2007(Charlier et al, , 2009). The SWBs occurring in the study area are very diverse and include ponds, ditches and moist areas (Fig.…”

Section: Study Areamentioning

confidence: 99%

“…They act as a means to increase awareness of F. hepatica transmission and the need for treatment/control among animal health workers and farmers. F. hepatica-infected and uninfected farms can, both within low-and high-risk areas, co-exist next to each other depending on the presence or absence of suitable SWB habitats for the principal intermediate host, G. truncatula (Bennema et al, 2009). Recent field research has shown that assessment of the presence of the intermediate host snails combined with farm management practices can be a powerful approach to predict F. hepatica infection risk at the farm level .…”

Section: Introductionmentioning

confidence: 99%

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Fine-scale mapping of vector habitats using very high resolution satellite imagery: a liver fluke case-study

et al. 2014

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Abstract. The visualization of vector occurrence in space and time is an important aspect of studying vector-borne diseases. Detailed maps of possible vector habitats provide valuable information for the prediction of infection risk zones but are currently lacking for most parts of the world. Nonetheless, monitoring vector habitats from the finest scales up to farm level is of key importance to refine currently existing broad-scale infection risk models. Using Fasciola hepatica, a parasite liver fluke as a case in point, this study illustrates the potential of very high resolution (VHR) optical satellite imagery to efficiently and semi-automatically detect detailed vector habitats. A WorldView2 satellite image capable of <5m resolution was acquired in the spring of 2013 for the area around Bruges, Belgium, a region where dairy farms suffer from liver fluke infections transmitted by freshwater snails. The vector thrives in small water bodies (SWBs), such as ponds, ditches and other humid areas consisting of open water, aquatic vegetation and/or inundated grass. These water bodies can be as small as a few m 2 and are most often not present on existing land cover maps because of their small size. We present a classification procedure based on object-based image analysis (OBIA) that proved valuable to detect SWBs at a fine scale in an operational and semi-automated way. The classification results were compared to field and other reference data such as existing broad-scale maps and expert knowledge. Overall, the SWB detection accuracy reached up to 87%. The resulting fine-scale SWB map can be used as input for spatial distribution modelling of the liver fluke snail vector to enable development of improved infection risk mapping and management advice adapted to specific, local farm situations.

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Seasonal pattern of Fasciola hepatica antibodies in dairy herds in Northern Germany

2012

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Fasciolosis, caused by the liver fluke Fasciola hepatica, is one of the most important parasitoses in cattle farming worldwide. In dairy cows, the trematode leads to economic losses due to decreased milk yield, a negative impact on reproduction parameters, and liver condemnations. In the present study, the seasonal patterns of F. hepatica antibodies in bulk-tank milk from dairy herds located in East Frisia, a region of the federal state Lower Saxony in the north of Germany, were investigated. This region was chosen since it is known as a high risk area for fluke infections due to its coastal location at the North Sea with the consequence of rather moist pastures. Between 669 and 868 bulk-tank milk samples were collected in January, September and November 2008 and 2010, respectively, and analysed for antibodies against F. hepatica with an in-house ELISA based on excretory-secretory antigens of the liver fluke. The overall East Frisian prevalence was 49.1%, 57.1% and 53.9% in January, September and November 2008 and 45.1%, 49.5% and 48.4% in 2010. From a number of 606 farms, which were sampled in all six investigated months, 34.5% of the farms continued to remain positive, whereas 30.9% continued to remain negative. A percentage of 69.1% (419 farms) were positive on at least one sampling occasion during the study period. The distributions of optical density ratio (ODR) values were skewed to the left but showed a second, lower peak in a high ODR range. Statistical analysis revealed a significant difference concerning the prevalence increase from January to September 2008. Furthermore, the prevalence decrease from September as well as November 2008 to these months in 2010 was significantly different, what might result from a more frequent use of anthelminthics or different climatic conditions.

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The use of bulk-tank milk ELISAs to assess the spatial distribution of Fasciola hepatica, Ostertagia ostertagi and Dictyocaulus viviparus in dairy cattle in Flanders (Belgium)

Cited by 90 publications

References 26 publications

Distribution of Fasciola hepatica in Swedish dairy cattle and associations with pasture management factors

Distribution of Fasciola hepatica in Swedish dairy cattle and associations with pasture management factors

Fine-scale mapping of vector habitats using very high resolution satellite imagery: a liver fluke case-study

Seasonal pattern of Fasciola hepatica antibodies in dairy herds in Northern Germany

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