SUISAG

Horgen / Allmend, Switzerland
Horgen / Allmend, Switzerland
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Kraemer J.G.,University of Geneva | Kraemer J.G.,University of Bern | Pires J.,University of Bern | Kueffer M.,University of Bern | And 4 more authors.
Science of the Total Environment | Year: 2017

The presence of Methicillin-Resistant Staphylococcus aureus (MRSA) in pig farms has been widely reported, and the emergence of extended-spectrum β-lactamase-producing Enterobacteriaceae (ESBL-E) has been documented in several countries. However, data for Switzerland are very scarce. This study aimed to compare changes in the prevalence of MRSA in Swiss pig farms between 2008 and 2015 and make the first ever estimates of the presence of ESBL-E and carbapenemase producers in pigs and pig farm workers. Results showed that ESBL-E was present in both pigs and farm workers and that the proportion of farms with MRSA had increased fourfold in seven years (from 7% to 31%). Associations between antibiotic use and resistant bacteria carriage were shown. © 2017 Elsevier B.V.


PubMed | University of Zürich, University of Bern, SUISAG and Hochschule fur Agrar
Type: Journal Article | Journal: Schweizer Archiv fur Tierheilkunde | Year: 2016

In the present study, risk factors for the use of oral antibiotics in weaned piglets were collected on 112 pig farms by a personal questionaire. The most common indication for an antibiotic group therapy was diarrhoea, and the most frequently used antibiotic was Colistin. On average, 27.33 daily doses in the control farms and 387.21 daily doses in the problem farms per 1000 weaners were administered on a given day. The significant risk factors in the multivariate model were poor hygiene in the water supply of suckling piglets, less than two doses of prestarter feed daily, lack of an all-in-and-all-out production system in weaners, no herd book performance data analysis, and less than two of the legally prescribed veterinary visits per year. Furthermore, the treatment incidence of weaners for oral antibiotics was calculated on the basis of the drug inventory. This study provides evidence that the use of oral antibiotics in weaners can be reduced by interventions in hygiene and management.


Masclaux F.G.,University of Geneva | Sakwinska O.,University of Lausanne | Sakwinska O.,Nestlé | Charriere N.,University of Geneva | And 2 more authors.
Annals of Occupational Hygiene | Year: 2013

Pigs are very often colonized by Staphylococcus aureus and transmission of such pig-associated S. aureus to humans can cause serious medical, hygiene, and economic problems. The transmission route of zoonotic pathogens colonizing farm animals to humans is not well established and bioaerosols could play an important role. The aim of this study was to assess the potential occupational risk of working with S. aureus-colonized pigs in Switzerland. We estimated the airborne contamination by S. aureus in 37 pig farms (20 nursery and 17 fattening units; 25 in summer, 12 in winter). Quantification of total airborne bacterial DNA, airborne Staphylococcus sp. DNA, fungi, and airborne endotoxins was also performed. In this experiment, the presence of cultivable airborne methicillin-resistant S. aureus (MRSA) CC398 in a pig farm in Switzerland was reported for the first time. Airborne methicillin-sensitive S. aureus (MSSA) was found in ~30% of farms. The average airborne concentration of DNA copy number of total bacteria and Staphylococcus sp. measured by quantitative polymerase chain reaction was very high, respectively reaching values of 75 (± 28) × 107 and 35 (± 9.8) × 105 copy numbers m-3 in summer and 96 (± 19) × 108 and 40 (± 12) × 106 copy numbers m-3 in winter. Total mean airborne concentrations of endotoxins (1298 units of endotoxin m -3) and fungi (5707 colony-forming units m-3) exceeded the Swiss recommended values and were higher in winter than in summer. In conclusion, Swiss pig farmers will have to tackle a new emerging occupational risk, which could also have a strong impact on public health. The need to inform pig farmers about biological occupational risks is therefore crucial. © 2013 The Author.


Caspari K.,SUISAG | Henning H.,University Utrecht | Schreiber F.,Boehringer Ingelheim | Maass P.,Boehringer Ingelheim | And 3 more authors.
Theriogenology | Year: 2014

Porcine circovirus type-2 (PCV2) is widespread in domestic pig populations. It can be shed with boar semen, but the role boars have in epidemiology is still unclear. Vaccinating boars against PCV2 can reduce disease and virus load in semen, but may have unwanted side effects, that is, impairment of spermatogenesis. Therefore, the aim of this study was to investigate the effect and impact of two different PCV2 vaccines on boar semen quality and quantity. Healthy normospermic Large White boars in three groups of 12 each were vaccinated with either Circovac, Ingelvac CircoFLEX, or received NaCl. Eight ejaculates were collected starting 1week after vaccination and assessed for quantitative traits. In general, sperm quantity and quality parameters did not change due to the vaccination (P>0.05). Only DNA integrity between the Circovac and control group was P<0.05 but remained at a low level (<2%). One boar showed clinical signs with body temperature up to 39.9°C and went off feed. For this animal, a clear relation between vaccination, fever period, and impaired sperm quality could be observed. The results indicate that both vaccines did not have a major impact on sperm quality or quantity. Therefore, vaccination of boars against PCV2 seems to be feasible. However, one boar treated with the oil-based vaccine showed a temporarily impaired semen quality after elevated body temperature after vaccination. Thus, possible systemic reactions and the subsequent impact on sperm quality should be taken into account when choosing a PCV2 vaccine for boars. © 2014 Elsevier Inc.


PubMed | University Utrecht, Boehringer Ingelheim, SUISAG and University of Veterinary Medicine Hannover
Type: Journal Article | Journal: Theriogenology | Year: 2014

Porcine circovirus type-2 (PCV2) is widespread in domestic pig populations. It can be shed with boar semen, but the role boars have in epidemiology is still unclear. Vaccinating boars against PCV2 can reduce disease and virus load in semen, but may have unwanted side effects, that is, impairment of spermatogenesis. Therefore, the aim of this study was to investigate the effect and impact of two different PCV2 vaccines on boar semen quality and quantity. Healthy normospermic Large White boars in three groups of 12 each were vaccinated with either Circovac, Ingelvac CircoFLEX, or received NaCl. Eight ejaculates were collected starting 1week after vaccination and assessed for quantitative traits. In general, sperm quantity and quality parameters did not change due to the vaccination (P>0.05). Only DNA integrity between the Circovac and control group was P<0.05 but remained at a low level (<2%). One boar showed clinical signs with body temperature up to 39.9C and went off feed. For this animal, a clear relation between vaccination, fever period, and impaired sperm quality could be observed. The results indicate that both vaccines did not have a major impact on sperm quality or quantity. Therefore, vaccination of boars against PCV2 seems to be feasible. However, one boar treated with the oil-based vaccine showed a temporarily impaired semen quality after elevated body temperature after vaccination. Thus, possible systemic reactions and the subsequent impact on sperm quality should be taken into account when choosing a PCV2 vaccine for boars.


Baes C.,Bern University of Applied Sciences | Mattei S.,University of Zürich | Luther H.,SUISAG | Ampuero S.,Agroscope Liebefeld Posieux ALP | And 4 more authors.
Animal | Year: 2013

Genetically reducing boar taint using low-taint lines is considered the most sustainable and economic long-term alternative to surgical castration of male pigs. Owing to the high heritability of the main boar taint components (androstenone, skatole and indole), breeding is an excellent tool for reducing the number of tainted carcasses. To incorporate boar taint into breeding programmes, standardized performance testing is required. The objective of this study was to develop and formally present a performance test for the main boar taint compounds on live breeding candidates. First, a standardized performance test for boar taint was established. A biopsy device was developed to extract small tissue samples (200 to 300 mg) from breeding candidates. Quantification of boar taint components from these small samples using specialized chemical extraction methods proved accurate and repeatable (r = 0.938). Following establishment of the method, biopsy samples of 516 live boars (100 to 130 kg live weight) were collected in the second step. Various mixed linear models were tested for each boar taint compound; models were ranked in terms of their information content. Pedigree information of 2245 ancestors of biopsied animals was included, and genetic parameters were estimated using univariate and multivariate models. Androstenone (in μg/g liquid fat (LF): mean = 0.578, σ = 0.527), skatole (in μg/g LF: mean = 0.033, σ = 0.002) and indole (in μg/g LF: mean = 0.032, σ = 0.002) levels obtained by biopsy were plausible. Heritability estimates for androstenone calculated with univariate (0.453) and multivariate (0.452) analyses were comparable to those in the literature. Heritabilities for skatole (0.495) and indole (0.550) were higher than that for androstenone. Genetic and phenotypic correlations were similar to those published previously. Our results show that data on boar taint compounds from small adipose samples obtained by biopsy provide similar genetic parameters as that described in the literature for larger samples and are therefore a reliable performance test for boar taint in live breeding candidates. Copyright © The Animal Consortium 2012.


Enz A.,Abteilung Schweinemedizin | Schupbach-Regula G.,University of Bern | Bettschart R.,Abteilung fur Anasthesiologie | Fuschini E.,SUISAG | And 2 more authors.
Schweizer Archiv fur Tierheilkunde | Year: 2013

The objectives of this study were a description of the practical implementation of the painless castration under inhalational anaesthesia with an objective assessment of animal welfare, workplace safety and time exposure. 600 questionnaires were sent to farmers all over Switzerland and 100 farms were visited during castration under inhalation anaesthesia. 44% of the visited farmers administered analgetics during anaesthesia or less than 10 minutes before castration. 14% of the piglets were insufficiently anaesthetised (moving or vocalising) and 18% showed stronger bleeding tendency after castration. The mortality rate was less than 0.1%. 22% of the swine farmers reported headache or dizziness during or after castration work. The Isoflurane level on 2 farms was above the Swiss safety limits. The time needed for castration was with 4.3 minutes clearly above the time necessary without anaesthesia. The additional financial costs and time are at the moment not adequately compensated to the farmers. © 2013 Verlag Hans Huber, Hogrefe AG, Bern.


Rangkasenee N.,Leibniz Institute for Farm Animal Biology | Murani E.,Leibniz Institute for Farm Animal Biology | Brunner R.,Leibniz Institute for Farm Animal Biology | Schellander K.,University of Bonn | And 6 more authors.
Molecular Biology Reports | Year: 2013

The liability to lesions of dysfunctions of bone and joints in pigs, summarized as leg weakness and mostly expressed as osteochondrosis, is an animal welfare and economic issue in pig production. The objective of this study was to identify polymorphisms in the functional and positional candidate genes keratin 8 (KRT8), Fas-associated factor 1 (FAF1) and parathyroid hormone type I receptor (PTH1R) and to evaluate their association with leg weakness traits. Therefore, osteochondrosis lesions were scored in animals of a Duroc × Pietrain F2 population (DuPi; n = 310) and commercial herds of the breed Large White (n = 298). In addition, bone mineralization traits were observed in DuPi population. SNPs were identified in genes KRT8 (g.8,039G > A), FAF1 (g.380,914T > C) and PTH1R (c.1,672C > T). KRT8 showed significant association with bone mineral density and content (P ≤ 0.05). FAF1 was association with OC lesions score of all joints inspected (P ≤ 0.05). PTH1R showed significant dominance effects on OC lesion scores of the distal femur articular cartilage (P = 0.01) and epiphysis of the distal ulna (P = 0.05) as well as sums of scores of all joints (OCsum, P = 0.04) and assignment to groups of either severely or gently affected animals (OCcat, P = 0.01). This study reveals clear genetic-statistical evidence for a link of KRT8, FAF1 and PTH1R with some of leg weakness related traits in pigs. © 2012 Springer Science+Business Media Dordrecht.


Becker D.,University of Bern | Wimmers K.,Leibniz Institute for Farm Animal Biology | Luther H.,SUISAG | Hofer A.,SUISAG | Leeb T.,University of Bern
PLoS ONE | Year: 2013

The improvement of meat quality and production traits has high priority in the pork industry. Many of these traits show a low to moderate heritability and are difficult and expensive to measure. Their improvement by targeted breeding programs is challenging and requires knowledge of the genetic and molecular background. For this study we genotyped 192 artificial insemination boars of a commercial line derived from the Swiss Large White breed using the PorcineSNP60 BeadChip with 62,163 evenly spaced SNPs across the pig genome. We obtained 26 estimated breeding values (EBVs) for various traits including exterior, meat quality, reproduction, and production. The subsequent genome-wide association analysis allowed us to identify four QTL with suggestive significance for three of these traits (p-values ranging from 4.99×10-6 to 2.73×10-5). Single QTL for the EBVs pH one hour post mortem (pH1) and carcass length were on pig chromosome (SSC) 14 and SSC 2, respectively. Two QTL for the EBV rear view hind legs were on SSC 10 and SSC 16. © 2013 Becker et al.


Schupbach-Regula G.,University of Bern | Bettschart R.,Abteilung fur Anasthesiologie | Fuschini E.,SUISAG
Schweizer Archiv fur Tierheilkunde | Year: 2013

The aim of this study was to describe the practical implementation of the painless castration under injection anaesthesia in Switzerland. 30 swine farms were visited and 60 farmers answered a questionnaire. 34% of the piglets showed movements during castration under injection anaesthesia and 17% had excitations during recovery from anaesthesia. After 48 minutes half of the piglets were in sternal position and after 112 minutes half of them showed coordinated movements. The body temperature decreased by 3.1 °C until 60 minutes after castration, especially small piglets reached critical temperature levels. 38% of the piglets showed strong bleeding after castration. The healing of the wound was good according to 82% of the farmers. 83% of the farmers reported piglet losses, especially at the beginning of the anaesthesia period. The anaesthesia may be improved by using butorphanol in addition to the combination of ketamine and azaperone. The recovery of the piglets should be in a warm place without any risk of injury by obstacles or the sow. Increased bleeding can be controlled by using an emasculator. © 2013 Verlag Hans Huber, Hogrefe AG, Bern.

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