Evaluation of the Risk of African Swine Fever Virus Transmission at the Interface between Feral and Domestic Pigs in Lombardy, with a View to Establishing Preventive Measures for Domestic Pigs.

African swine fever (ASF) continues to spread worldwide, and has reached multiple countries across Asia, the Caribbean, Europe, and the Pacific, representing a serious economic burden threatening pig health and welfare, as well as food security. The disease affects domestic pigs and wild boar, and in several European countries the disease is endemic in wild boars. The lack of vaccines or effective treatments highlights the importance of effective control measures used to keep domestic and feral pigs separated to prevent the spread of the virus. However, the study of the livestock-wildlife interface is quite complex and has many aspects to consider, including the uncertainty of wild-boar population data. In this study, we determined the risk of spread of the ASF virus at the interface between domestic pigs and wild boars using indicators that can indirectly indicate the presence of wild boars in order to target specific control measures in the highest risk areas. The results of the study were compared with those obtained by Pittiglio, in which the population data for wild boars was estimated using a geostatistical method and similar results were obtained. However, the present study used specific information relating to the wild-boar population and this allowed us to use fewer variables.

Epidemiological Features of the Highly Pathogenic Avian Influenza Virus H5N1 in a Densely Populated Area of Lombardy (Italy) during the Epidemic Season 2021-2022.

In the last two years, there have been three major epidemic seasons in the territory of the European Union and the HPAI epizootic in 2021-2022 is the most severe in recent history. In Italy, the disease was introduced to dense poultry areas with serious economic consequences for the entire sector. In Lombardy, the analysis of the risk factors was carried out, also taking into account the density of domestic birds. In the most affected areas, 66.7% of the outbreaks occurred in the areas with the highest poultry density and the likelihood of an outbreak occurring increased with an increase in the density of birds per km2. In cells 10 × 10 km with a density greater than 10,000 birds/km2, the probability of outbreak occurrence was over 66.7%. The provinces involved in the last epidemic were the same involved in previous epidemics and, given the risk factors present in the area, it is plausible that the risk remains high also for future epidemic seasons. Therefore, to avoid the repetition of similar events, certain control measures shall be strengthened and vaccination considered as a complementary tool for the control of HPAI virus in risk areas.

Analysis of Bee Population Decline in Lombardy during the Period 2014-2016 and Identification of High-Risk Areas.

The first events of bee decline in Italy were reported during 1999. Since then, population decline has frequently been reported in Lombardy. In this study, the association between bee decline and the type of land surrounding the apiary was evaluated. A risk map was developed to identify areas with the highest risk of decline. Apiaries in Lombardy were selected from the national beekeeping database (BDA). The study period was from 2014 to 2016. Apiaries were deemed "declined" if they reported at least one event of decline or tested positive for plant protection products; apiaries were "not declined" if they did not report any events of bee decline during the study period. Out of 14,188 apiaries extracted from the BDA, 80 were considered declined. The probability of an apiary being declined increases by 10% in orchards and by 2% in arable land for each additional km2 of land occupied by these crops. The study showed an association between bee decline and the type of territory surrounding the apiaries, and the areas at the greatest risk of decline in Lombardy were identified. This information can be used by Veterinary Services as a predictive parameter for planning prevention and control activities.

[Analysis of pigs' movement to Lombardy (Northern Italy) to assess the potential risk of pathogens introduction into this region and to plan mitigation measures]. / Analisi delle movimentazioni di suini in entrata in Lombardia al fine di valutare il potenziale rischio di introduzione di patogeni nella regione e pianificare misure di controllo.

OBJECTIVES: to analyse the trade flow of pigs to Lombardy (Northern Italy) to single out the farms more involved in animal movements to identify the holdings and areas most exposed to the risk of introducing pathogens into the region and to plan proper mitigation measures. Indeed, the movement of live animals and of the means of transport is one of the main risk factors in the spread of diseases and this is particularly relevant in areas with high stocking density. DESIGN: statistical analysis on movements of pigs entering Lombardy was carried out. Data on pigs' movements and farm characteristics were collected from the National and Regional databases. Social Network Analysis (SNA) was used to analyse the flows of pigs to Lombardy, to identify the holdings and geographical areas that are central in the trading network and that could have a role in the introduction of swine pathogens into the region. SETTING AND PARTICIPANTS: data on pigs' movements introduced into Lombardy in 2016 were analysed. Lombardy is a region of Northern Italy with intensive livestock husbandry. The pig sector is of particular economic relevance also in view of the processing industry, suited to the production of high quality pork products. Annually about 1.8 million pigs are introduced into the region also to satisfy the request of the processing industry for the production of pork products. MAIN OUTCOME MEASURES: in this study, the farms that buy pigs from outside the region were identified as well as the territories where the largest number of pigs are introduced. The analysis was carried out also considering certain factors related to the movement of animals, which can be relevant for the transmission of pathogens, such as number of commercial partners, number of exchanged animals, and number of shipments. RESULTS: in 2016, 1,782,568 pigs were introduced into Lombardy; by using SNA, it was possible to highlight a complex trade network of pigs, mainly involving the Northern regions. Indeed, the pigs were mostly purchased from Emilia Romagna (33.4%), followed by Veneto and Piedmont. These regions have been the most closely analysed in this study. SNA was also used to identify Lombardy territories (provinces and municipalities) which, based on the number of introduced pigs, are potentially most exposed to the introduction of pathogens from outside the region. Mantua and Brescia provinces resulted the most exposed area. CONCLUSIONS: Italy is one of most important European producers of pigs and about 50% of national pig assets is present in Lombardy; furthermore, about 1.8 million pigs are introduced yearly into the region. Currently, the region is free from the main diseases of pigs and the introduction of an epidemic disease into the pig population could adversely affect the entire productive sector. For this reason, an analysis of the movements of pigs entering the region was carried out to identify the areas (provinces, municipalities) and holdings most exposed to the risk of introduction of pathogens. This information is relevant for the veterinary authorities to plan appropriate control activities (official controls, surveillance, biosecurity, and vaccination, where possible) in order to enhance disease prevention and promote early detection.

Analysis of Risk Factors for African Swine Fever in Lombardy to Identify Pig Holdings and Areas Most at Risk of Introduction in Order to Plan Preventive Measures.

In 2019, the area of the European Union (EU) affected by African swine fever (ASF) expanded progressively in a southwestern direction from Baltic and eastern countries. The disease can severely affect and disrupt regional and international trade of pigs and pork products with serious socioeconomic damages to the pig industry. Lombardy is one of the most important European pig producers and the introduction of ASF into the pig population could adversely affect the entire sector. A study was carried out to identify the farms and territories in the region most at risk of ASF introduction to plan preventive measures. The pig holdings were identified through a descriptive analysis of pig movements and Social Network Analysis (SNA), while, for the identification of the most exposed municipalities, an assessment of risk factors was carried out using the ranking of summed scores attributed to the Z-score. From the analysis, it was found that 109 municipalities and 297 pig holdings of the region were potentially more at risk, and these holdings were selected for target surveillance. This information was provided to veterinary authority to target surveillance in pig farms, in order to early detect a possible incursion of ASF and prevent its spread.

3D Printing of Cantilever-Type Microstructures by Stereolithography of Ferromagnetic Photopolymers.

In the present work, prototypes of polymeric cantilever-based magnetic microstructures were fabricated by means of stereolithography (SL). To this end, a UV-curable system suitable for high-resolution SL-processing was formulated by blending a bifunctional acrylic monomer with photoinitiator and visible dye whose content was tuned to tailor resin SL sensitivity. Subsequently, to confer ferromagnetic properties to the photopolymer, two different strategies were implemented. A two-step approach involved selective deposition of a metal layer on photopolymer SL-cured surfaces through an electroless plating process. On the other hand, SL-processable ferromagnetically responsive nanocomposites (FRCs) were obtained by directly loading magnetite nanoparticles within the photopolymer matrix. In order to achieve high-printing resolution, resin SL sensitivities were studied as a function of the various additives contents. Photocalorimetric analyses were also performed to investigate the photopolymer conversion efficiency upon light exposure. High-performing formulations were characterized by reduced penetration depth (<50 µm) and small critical energies thus enabling for fast printing of micrometric structures. Finally, the self-standing characteristics of the resin combined with the layered-fashion deposition typical of the 3D printing technologies were exploited for the fabrication of cantilever (CL)-based beams presented as possible magnetic sensors. As a demonstration of the feasibility of the two approaches, the magnetic beams were successfully actuated and their sensing performances in terms of static deflection vs applied magnetic field applied were qualitatively studied. Being not restricted to CL-based geometries, the combination of SL-printing with the formulation of novel smart photopolymers open the way toward the fabrication of high-customized complex 3D models integrating functional microstructures.

Surveillance of Mosquitoes and Selected Arthropod-Borne Viruses in the Context of Milan EXPO 2015.

From 1 May 2015 to 31 October 2015 over 20 million visitors from all over the world visited the Universal Exhibition (EXPO) hosted by Milan (Lombardy region, Italy), raising concerns about the possible introduction of mosquito-borne diseases from endemic countries. The entomological surveillance protocol performed in Lombardy over the last three years was implemented in the EXPO area and in the two major regional airports using both Center for Disease Control CO2 and Biogents Sentinel traps. This surveillance aimed to estimate the presence and densities of putative vectors, and also to support investigations, including the vector species involved and area of diffusion, on the local spread of Chikungunya, Dengue and West Nile viruses (WNV) by competent vectors. From 3544 mosquitoes belonging to five different species, 28 pools of Culex spp. and 45 pools of Aedes spp. were screened for the presence of WNV, and for both Chikungunya and flaviviruses, respectively. The entomological surveillance highlighted a low density of potential vectors in the surveyed areas and did not reveal the presence of Chikungunya or Dengue viruses in the local competent vectors inside the EXPO area or in the two airports. In addition, the surveillance reported a low density of Culex spp. mosquitoes, which all tested negative for WNV.

Donepezil modulates the endogenous immune response: implications for Alzheimer's disease.

OBJECTIVE: Donepezil (DNPZ) is a drug commonly used for Alzheimer's disease (AD) that may favour a T helper 2 phenotype leading to increased naturally occurring auto-antibodies (NAb) against beta-amyloid (Aß). We hypothesized the involvement of the cholinergic receptors [α7-nicotnic acetylcholine receptor (α7nAChR)] expressed on peripheral blood mononuclear cells (PBMC). METHODS: Fifty patients with mild-to-moderate AD, DNPZ treated (DNPZ+, n = 25) or not (DNPZ-, n = 25), and 25 matched controls were enrolled and PBMC extracted for both in vitro cultures, and real-time polymerase chain reaction and chromatin immunoprecipitation assay. Plasma samples were also obtained for Aß and NAb determination. RESULTS: Donepezil increased in vitro the expression of the transcription factor GATA binding protein 3 (GATA3) through α7nAChR, because prevented by the specific antagonist methyllycaconitine. Ex vivo PBMC α7nAChR mRNA expression was increased in both AD groups, while GATA3 expression was not. A significant increase in the GATA3/interleukin 5 promoter association was found in DNPZ+ patients. Finally, DNPZ+ patients showed both significantly higher plasma levels of anti-Aß NAb with respect to DNPZ- patients and Aß 1-42 with respect to normal controls. CONCLUSIONS: Donepezil might modulate a T helper 2 bias via α7nAChR leading to increased expression of NAb. Further studies on the role of the modulation of the immune response against Aß may pave the way to innovative therapeutic strategies for AD. Copyright © 2016 John Wiley & Sons, Ltd.

Brain targets: can you believe your own eyes?

The unquestionable advantages provided by modern neuroimaging techniques have recently led some to question the duty of the neurologist, traditionally struggling first and foremost to establish the semeiotic localization of brain lesions and only then to interpret them. The present brief report of six clinical patients who came recently to our attention aims to emphasize that the interpretation of neuroimaging results always requires integration with anamnestic, clinical and laboratory data, together with knowledge of nosography and the literature. The solutions of the reported cases always originated from close interaction between the neurologist and the neuroradiologist, based on the initial diagnostic uncertainty linked to the finding of isolated or multiple brain target or ring lesions, too often considered paradigmatic examples of the pathognomonic role of neuroimaging.