Stay alert: probability of African Swine Fever introduction from Eastern Asia is almost as high as from Eastern Europe.

INTRODUCTION: African Swine Fever (ASF) is a severe viral disease infecting all suid species. Since the first outbreak in Georgia in 2007, it has slowly spread towards Western Europe and reached the European Union when first cases were detected in Poland and the Baltic States in 2014. ASF was first reported in China in 2018 and since then, it has spread to 14 countries within two years. This study aimed to estimate the introduction probability of ASF from Eastern Asia in a qualitative risk assessment, and to compare it to the probability from Eastern Europe, which was assessed in an earlier risk assessment. A high probability of introduction was estimated for the import of meat and meat products, which was found to be the most likely route of introduction. Less important routes were introduction by human contamination (low probability) or import of feed or blood products (very low probability). Import of domestic pigs or free-ranging wild boar, contaminated means of transport, or infected semen, embryo or ticks were all estimated to be negligible. For Eastern Europe, import of meat and meat products was also estimated to pose a high risk and was therefore the most likely route of introduction. Higher probabilities were estimated for import of live pigs, contaminated feed or means of transport and human contamination. Overall, the probability of introduction from Eastern Asia is only slightly lower than from Eastern Europe. As it is important to detect the first case as quickly as possible, it is important not to fall victim to habituation effects, but to remain vigilant.

INTRODUCTION: La peste porcine africaine (PPA) est une maladie virale grave qui infecte toutes les espèces de suidés. Depuis le premier foyer en Géorgie en 2007, elle s'est lentement propagée vers l'Europe occidentale et a atteint l'Union européenne lorsque les premiers cas ont été détectés en Pologne et dans les États baltes en 2014. La PPA a été signalée pour la première fois en Chine en 2018 et depuis lors, elle s'est propagée dans 14 pays en deux ans. Cette étude visait à estimer la probabilité d'introduction de la PPA en provenance d'Asie orientale par une évaluation qualitative des risques et à la comparer à la probabilité en provenance d'Europe de l'Est, qui a été estimée dans une évaluation des risques antérieure. Une forte probabilité d'introduction a été estimée pour l'importation de viande et de produits carnés, qui s'est avérée être la voie d'introduction la plus probable. Les voies moins importantes étaient l'introduction par contamination humaine (faible probabilité) ou l'importation d'aliments pour animaux ou de produits sanguins (très faible probabilité). Les importations de porcs domestiques ou de sangliers sauvages, de moyens de transport contaminés ou de sperme, d'embryons ou de tiques infectés ont tous été estimés négligeables. Concernant l'Europe de l'Est, l'importation de viande et de produits carnés était également considérée comme présentant un risque élevé et était donc la voie d'introduction la plus probable. Des probabilités plus élevées ont été estimées pour l'importation de porcs vivants, d'aliments ou de moyens de transport contaminés et de contamination humaine. Dans l'ensemble, la probabilité d'introduction depuis L'Asie orientale n'est que légèrement inférieure à celle de l'Europe de l'Est. Comme il est essentiel de détecter le premier cas le plus rapidement possible, il est important de ne pas être victime d'effets d'accoutumance, mais de rester vigilant.

The clinical diagnosis of equine sarcoids-Part 2: Assessment of case features typical of equine sarcoids and validation of a diagnostic protocol to guide equine clinicians in the diagnosis of equine sarcoids.

Research has shown that the accuracy of the clinical diagnosis of equine sarcoids (ES) can be improved. Particularly, less experienced veterinarians are often mistaken in their clinical judgement despite a high level of diagnostic confidence. The aim of this study was to develop and assess the performance of a diagnostic protocol (DP) to improve diagnostic accuracy and identify diagnostically challenging cases. The design of the DP was based on typical clinical features of ES and its algorithm was optimised through repeated tests on clinical cases prior to validating its performance in a representative online examination. A total of 22 equine practitioners and 31 veterinary students used the DP to diagnose 40 standardised ES and non-ES cases in an online examination. Scores of these 53 respondents were compared to scores of 128 respondents of comparable levels of expertise, and 14 experts, all assessing the same cases without using the DP. Overall, respondents using the DP were significantly more likely (odds ratio (OR) 1.25; 95% confidence interval (95% CI) 1.09-1.43) to diagnose a case correctly compared to respondents not using the DP and felt significantly more confident of their diagnosis (OR 1.53; 95% CI 1.39-1.67). Thus, the DP proved to be a reliable tool to increase clinical diagnostic accuracy and diagnostic confidence. The DP algorithms may be further improved with experiences gained from its application in equine practice and clinicians will be able to optimise their diagnostic accuracy and selection of lesions requiring a biopsy.

The clinical diagnosis of equine sarcoids - Part 1: Assessment of sensitivity and specificity using a multicentre case-based online examination.

Equine clinicians and researchers often make the diagnosis of equine sarcoids (ES) on clinical assessment alone, without histopathological confirmation. However, the accuracy of the clinical diagnosis of ES has not been critically assessed. To assess sensitivity, specificity, positive and negative predictive values of the clinical diagnosis of ES, 40 clinical cases with histologically confirmed equine skin lesions (26 ES and 14 non-ES) were compiled in a representative online examination. For each case and lesion, at least one photograph and all relevant information were presented in a standardised format. This included the horse's signalment, lesion localisation, lesion progression, presence of other skin lesions, earlier treatments and response to treatment. No information relevant for the assessment of the lesion was intentionally withheld. Fourteen ES experts, 39 board-certified equine specialists, 103 equine practitioners and 25 novices categorised the cases into ES or non-ES and graded their level of diagnostic confidence on a scale from 1 to 6 for each case. The overall success rate was 82.0% while sensitivity and specificity were 83.3% and 79.6%, respectively. The positive and negative predictive values were 88.4% and 72.0%, respectively, in the tested population with a 66% prevalence of ES. However, less experienced veterinarians were frequently wrong in their clinical judgement despite a high level of diagnostic confidence. Therefore, the authors propose to develop a diagnostic tool to help clinicians optimise their selection of lesions requiring a biopsy. Ultimately, this will help reduce costs and morbidity generated by unnecessary diagnostic and therapeutic efforts.

[Diagnosis, therapy and prophylactic measures of parturient paresis in dairy cattle: results of an online survey for Swiss veterinarians]. / Diagnose, Therapie und prophylaktische Massnahmen der Gebärparese beim Rind: Ergebnisse der Online-Umfrage bei Schweizer Tierärzten.

INTRODUCTION: The aim of this study was to obtain the diagnostic, therapeutic and prophylactic approach among Swiss veterinary practitioners in cows with parturient hypocalcemia. All members of the Association for Ruminant Health were contacted per e-mail. The survey was completed by 108 (28%) of 393 that were contacted. According to the questionnaire responses, the typical presentation of a parturient paresis cow is a pluriparous middle-yielding dairy cow one day post-partum in sternal recumbency with normal consciousness. The diagnosis is usually based upon the medical history. Therapy of parturient paresis consists of mixed infusions (with calcium, phosphorus, magnesium or glucose) as well as oral preparations with calcium. The veterinarians estimate that 25-50% of the cows treated for parturient paresis need more than one treatment and that one case of parturient paresis costs CHF 200-300. Prophylactic treatments are usually used for cows, which have suffered from parturient paresis in the previous lactation, elder cows (≥ 3 lactations) as well as cows with a high body condition score (> 3.25). Prophylactic measures used by the veterinarians are vitamin D3 injections and oral preparations with calcium. They recommended a special diet, for example a low calcium diet ante-partum.

INTRODUCTION: Le but de la présente enquête en ligne était de relever les méthodes de diagnostic, de traitement et de prophylaxie utilisées en pratique en matière de parésie puerpérale hypocalcémique. Tous les membres de l'Association suisse pour la santé des ruminants ont été contactés par courriel. Sur les 393 questionnaires envoyés, 108 (28%) ont été remplis complètement et exploités. L'anamnèse typique est un animal pluripare avec une production de parésie puerpérale, il est mentionné des animaux pluripares avec une production laitière moyenne, incapables de se lever un jour après le vêlage et présentant un état de conscience normal. Le diagnostic est fréquemment posé sur la base de l'anamnèse. Les vaches laitières concernées sont traitées avec des perfusions mixtes (produits à base de calcium et de phosphore, parfois avec du magnésium et du glucose) et des préparations de calcium orales. Les vétérinaires estiment que 25 à 50% des vaches nécessitent plusieurs traitements et que les coûts totaux par animal de l'ordre de CHF 200 à 300. Du point de vue prophylactique, ce sont principalement les animaux ayant déjà souffert d'une parésie lors de la lactation précédente ainsi que les vaches plus âgées (3ème lactation et plus) et celles présentant un indice de condition élevé (> 3.25) qui sont traitées. Les vétérinaires utilisent pour cette prophylaxie des injections de vitamine D3 ainsi que des préparations orales de calcium et/ou conseillent aux propriétaires une alimentation pauvre en calcium ante partum.

High-content analysis of factors affecting gold nanoparticle uptake by neuronal and microglial cells in culture.

Owing to their ubiquitous distribution, expected beneficial effects and suspected adverse effects, nanoparticles are viewed as a double-edged sword, necessitating a better understanding of their interactions with tissues and organisms. Thus, the goals of the present study were to develop and present a method to generate quantitative data on nanoparticle entry into cells in culture and to exemplarily demonstrate the usefulness of this approach by analyzing the impact of size, charge and various proteinaceous coatings on particle internalization. N9 microglial cells and both undifferentiated and differentiated SH-SY5Y neuroblastoma cells were exposed to customized gold nanoparticles. After silver enhancement, the particles were visualized by epipolarization microscopy and analysed by high-content analysis. The value of this approach was substantiated by assessing the impact of various parameters on nanoparticle uptake. Uptake was higher in microglial cells than in neuronal cells. Only microglial cells showed a distinct size preference, preferring particles with a diameter of 80 nm. Positive surface charge had the greatest impact on particle uptake. Coating with bovine serum albumin, fetuin or protein G significantly increased particle internalization in microglial cells but not in neuronal cells. Coating with wheat germ agglutinin increased particle uptake in both N9 and differentiated SH-SY5Y cells but not in undifferentiated SH-SY5Y cells. Furthermore, internalization was shown to be an active process and indicators of caspase-dependent apoptosis revealed that gold nanoparticles did not have any cytotoxic effects. The present study thus demonstrates the suitability of gold nanoparticles and high-content analysis for assessing numerous variables in a stringently quantitative and statistically significant manner. Furthermore, the results presented herein showcase the feasibility of specifically targeting nanoparticles to distinct cell types.

[Lung and pleural lesions before and after implementation of a national eradication program against enzootic pneumonia and actinobacillosis as well as changes of slaughter carcass organs in slaughter pigs in Switzerland]. / Lungen- und Pleuraläsionen vor und nach der Flächensanierung gegen Enzootische Pneumonie und Actinobazillose sowie Organ- und Schlachtkörperveränderungen bei Schlachtschweinen in der Schweiz.

In a representative cross-sectional study during 12 months of the years 2008/2009 in four abattoirs in Switzerland, lung and pleura lesions as well as lesions of slaughter carcasses and organs of 34 706 pigs were studied for frequency and type of macroscopic lesions. Of the 24276 examined pigs, 91.2% of the lungs, 94.4% of the heart and 95.5% of the livers showed no macroscopically visible lesions. Pigs that were produced for a label program had significantly less bronchopneumonia and pneumonia residuals, pleuritis and liver lesions due to echinococcosis. Pigs supervised by the Swiss Pig Health Service (SGD), showed significantly less bronchopneumonia and pneumonia residuals, diffuse pleuritis, pleuritis/pericarditis and milkspots compared to the non-SGD supervised farms. Thanks to the national eradication program for enzootic pneumonia (EP) and actinobacillosis, the health-status of lungs has been considerably improved and the prevalence of pleurisy decreased considerably. The results of this study indicate a good herd health in Swiss pig production.

Time-series analysis of Campylobacter incidence in Switzerland.

Campylobacteriosis has been the most common food-associated notifiable infectious disease in Switzerland since 1995. Contact with and ingestion of raw or undercooked broilers are considered the dominant risk factors for infection. In this study, we investigated the temporal relationship between the disease incidence in humans and the prevalence of Campylobacter in broilers in Switzerland from 2008 to 2012. We use a time-series approach to describe the pattern of the disease by incorporating seasonal effects and autocorrelation. The analysis shows that prevalence of Campylobacter in broilers, with a 2-week lag, has a significant impact on disease incidence in humans. Therefore Campylobacter cases in humans can be partly explained by contagion through broiler meat. We also found a strong autoregressive effect in human illness, and a significant increase of illness during Christmas and New Year's holidays. In a final analysis, we corrected for the sampling error of prevalence in broilers and the results gave similar conclusions.