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Staffanstorp, Sweden

Frosth S.,Swedish University of Agricultural Sciences | Frosth S.,National Veterinary Institute SVA | Konig U.,Swedish Animal Health Service | Nyman A.-K.,National Veterinary Institute SVA | And 2 more authors.
Veterinary Microbiology | Year: 2015

The aim of this study was to determine the proportion of Dichelobacter nodosus, Fusobacterium necrophorum and Treponema spp. in sheep with different clinical manifestations of footrot compared to healthy sheep both at flock and individual level. The second aim was to characterise D. nodosus with respect to virulence, presence of intA gene and the serogroups. Swab samples (n = 1000) from footrot-affected (n = 10) and healthy flocks (n = 10) were analysed for the presence of D. nodosus, F. necrophorum and Treponema spp. by real-time PCR and culturing (D. nodosus only). Dichelobacter nodosus isolates (n = 78) and positive swabs (n = 474) were analysed by real-time PCR for the aprV2/B2 and the intA genes and by PCR for the fimA gene (isolates only). D. nodosus was more commonly found in flocks affected with footrot than in clinically healthy flocks. A significant association was found between feet with severe footrot lesions and the aprV2 gene and between feet with moderate or no lesions and the aprB2 gene, respectively. F. necrophorumwas more commonly found in flocks with footrot lesions than in flocks without lesions. No significant association was found between sheep flocks affected with footrot and findings of Treponema spp. or the intA gene. Benign D. nodosus of six different serogroups was detected in twelve flocks and virulent D. nodosus of serogroup G in one. In conclusion, D. nodosus and F. necrophorum were more commonly found in feet with footrot than in healthy feet. The majority of D. nodosus detected was benign, while virulent D. nodosus was only detected in a single flock. © 2015 Elsevier B.V. Source

Torsein M.,Swedish Animal Health Service | Torsein M.,Swedish University of Agricultural Sciences | Jansson-Mork M.,Vaxa Sverige | Lindberg A.,National Veterinary Institute | And 2 more authors.
Journal of Dairy Science | Year: 2014

The aim of the study was to describe large Swedish dairy herds with high and low mortality risk in calves during the first 90 d of life, using herd-level data, and to evaluate if high calf mortality risk is associated with other herd-level management variables that influence cow health. A total of 57 Swedish dairy herds met the inclusion criteria of affiliation to the Swedish official milk recording scheme, herd size of ≥140 and ≥160 cows in 2008/2009 and 2009/2010, and calf mortality risks, classified as high (HM; calf mortality risk at least 3.5% in 2008/2009 and 5.5% in 2009/2010; n. =. 28) or low (LM; calf mortality risk less than <1.5% in 2008/2009 and 2009/2010; n. =. 29), and were thus included in the study. The data used in this study were collected from the Swedish Dairy association during the milking year 2009/2010. For LM herds, the calf mortality risk ranged from 0 to 1.46 (median. =. 0.66) in 2008/2009 and from 0 to 1.48 (median. =. 0.67) in 2009/2010. For HM herds, the calf mortality risk ranged from 3.57 to 11.52 (median. =. 6.15) in 2008/2009 and from 5.88 to 18.23 (median. =. 8.39) in 2009/2010. Median age at death was 28 d for HM and 37 d for LM herds. Associations between type of herd (HM or LM) and the production variables were evaluated using multi-correspondence analysis and logistic regression models covering the areas "mortality and culling," "health," "herd/production variables," and "fertility." Herds with HM risks during d 1 to 90 were associated with higher on-farm mortality rate in cows, lower average milk yield, higher incidence of antibiotic treatment, and a higher proportion of purchased animals. These results indicate that herds with HM risk during d 1 to 90 have coexisting issues concerning cow management and health. Future research is needed to evaluate if identifying HM herds and working with advisory and preventive manners at these herds also can be positive for a reduction of on-farm mortality and antibiotic usage, which are important issues from a global perspective. © 2014 American Dairy Science Association. Source

Westin R.,Swedish University of Agricultural Sciences | Holmgren N.,Swedish Animal Health Service | Mattsson B.,Svenska Pig | Algers B.,Swedish University of Agricultural Sciences
Acta Agriculturae Scandinavica A: Animal Sciences | Year: 2013

The aim of the present paper was to study the throughput capacity (i.e. the ability of straw to drain through slatted flooring) of 15 kg of chopped straw used around the time of farrowing. A cohort study including 96 sows was conducted in two commercial herds, comparing chopped wheat straw of three length categories (mass median length 39, 70 and 130 mm). Straw with short and medium chop lengths was completely absent in 83% (plastic slats) and 85% (cast-iron slats), respectively, of the pens on Day 4 after farrowing, compared to 7% and 6% of pens provided with the longest straw category. We conclude that it is technically feasible to have an efficient throughput of straw and to maintain good pen hygiene in partly slatted farrowing pens provided with 15 kg of chopped straw at farrowing. However, straw chop lengths need to be adjusted to the type of slatted flooring used. © 2013 Copyright Taylor and Francis Group, LLC. Source

Boqvist S.,Swedish University of Agricultural Sciences | Eliasson-Selling L.,Swedish Animal Health Service | Bergstrom K.,National Veterinary Institute | Magnusson U.,Swedish University of Agricultural Sciences
Veterinary Journal | Year: 2012

Outdoor reared pigs were used as indicators for investigating the effect of weather conditions in the seroprevalence of Leptospira. Over the period February to March 2008, sera from 386 sows on 11 farms in southern Sweden were tested for antibodies to the following Leptospira serovars: L. interrogans serovar (sv) Bratislava, L. kirschneri sv Grippotyphosa, L. interrogans sv Icterohaemorrhagiae, L. interrogans sv Pomona, L. borgpetersenii sv Tarassovi and one domestic strain (mouse 2A) related to L. borgpetersenii sv Sejroe and L. borgpetersenii sv Istrica. The highest seroprevalence was to this strain (8.0%) followed by sv Bratislava (3.9%). Six of the 11 farms had sows which were seropositive to at least one of the Leptospira serovars. Data on rainfall and temperature were retrieved for the respective farms. For each millimetre of extra rainfall, there was an increase in the odds ratio (OR) for seropositivity to sv Bratislava of 4.3 (95% CI 1.9-10), and to strain mouse 2A of 2.5 (95% CI 1.0-6.4). There was no association between seropositivity and temperature. This study indicates that different climate conditions within the northern temperate climate zone may be of importance for the presence of Leptospira-seropositivity in mammals. © 2011 Elsevier Ltd. Source

Torsein M.,Swedish University of Agricultural Sciences | Lindberg A.,National Veterinary Institute | Sandgren C.H.,Swedish Dairy Association | Waller K.P.,National Veterinary Institute | And 3 more authors.
Preventive Veterinary Medicine | Year: 2011

The aim of this study was to identify possible risk factors for 1-90 day calf mortality in large Swedish dairy herds. Sixty herds with a herd size of ≥160 cows were visited once between December 2005 and March 2006. Thirty herds were known to have low mortality (LM) and 30 were known high mortality herds (HM). Upon the visit, data about housing and management was collected from interviews with personnel responsible for the calves. The herd status regarding the calves' passive transfer (total protein), levels of α-tocopherol, β-carotene and retinol, and excretion of faecal pathogens (Cryptosporidium spp., Escherichia coli F5, rota and corona virus) was evaluated based on targeted sampling of high risk calf groups; in each herd, blood and faecal samples were collected from calves 1-7 and 1-14 days old, respectively. Similarly, the herd status regarding clinical respiratory disease in calves and history of respiratory virus exposure was evaluated based on lung auscultations and blood samplings of calves 60-90 days old. The median calf mortality risk (in calves 1-90 days of age) among HM herds was 9% (Range: 6-24%) and among LM herds 1% (Range: 0-2%). LM and HM herds were compared using five logistic regression models, covering potential risk factors within different areas: "Disease susceptibility", "Factors affecting the gastrointestinal tract", "Factors related to transmission of infectious disease", "Hygiene" and "Labour management" The percentage of calves, 1-7 days old, with inadequate serum concentrations of α-tocopherol and β-carotene were significantly higher in HM herds compared to LM herds and also associated with higher odds of being a HM herd (OR. = 1.02; p = 0.023 and OR. = 1.05; p = 0.0028, respectively). The variable "Average number of faecal pathogens in the sampled target group" was significantly associated with higher odds of being a HM herd (OR. = 4.65; p = 0.015), with a higher average in HM herds. The percentage of calves with diarrhoea treated with antibiotics was significantly higher in HM herds and was associated with higher odds of being a HM herd (OR. = 1.08; p = 0.021). The median age at death of calves in the age interval 1-90 days that died during a one-year period was significantly lower among HM herds (13 days) than in LM herds (24 days) (p = 0.0013) The results indicate that gastrointestinal disorders may be an important cause of calf mortality in large Swedish dairy herds. Furthermore, our study provides additional indications that fat soluble vitamins might play an important role for calf health. © 2010 Elsevier B.V. Source

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