Publications by authors named "Lucia DeCastelli"

Notification of foodborne outbreaks has been mandatory in Europe since 2005, and surveillance is carried out along the entire food chain. Here we report the results obtained from laboratory investigations about four cases of foodborne outbreaks that occurred in Sicily between 2009 and 2016, deemed to be related to staphylococcal enterotoxins (SEs) and coagulase-positive (CPS) by the Local Public Health Authority. cheese samples were processed by culture methods for enumeration of CPS and immunoenzymatic assays for detection and differentiation of the SEs possibly contained in food samples.

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The spread of antimicrobial resistant strains, linked to antimicrobials use and abuse in humans and food animals, has become a global public health problem. In this study, we determine the prevalence of antimicrobial resistance (AMR) in human isolates (n = 820) collected in Piedmont, Italy, from March 2020 to July 2023. The strains underwent susceptibility testing to determine the minimal inhibitory concentration for erythromycin, ciprofloxacin, gentamicin, streptomycin, and tetracycline: 80.

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In accordance with U.S. FDA Foods Program Regulatory Science Steering Committee guidelines, with this study, we optimized and validated a commercial real-time PCR method for the detection of low amounts of lupin in four classes of food matrices: chocolate cookies, ragù, Olivier salad, and barley and rice flour.

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  • The study examines the presence of zoonotic pathogens and antibiotic resistance genes in game meat from animals hunted in northwest Italy between 2020 and 2022.
  • Samples were collected from various animals, including chamois, roe deer, deer, and wild boar, using microbiological methods to detect and characterize the pathogens.
  • Findings revealed multiple strains of antibiotic-resistant pathogens in wild boar and chamois, highlighting the public health risk associated with consuming game meat from wildlife.
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In this study, we evaluated the use of hydrolates, co-products of essential oil distillation, as processing aids to improve the depuration process of Pacific oysters () as a post-harvest method aimed at reducing the norovirus (NoV) viral load. Live oysters were kept in water to which hydrolates of and at 1% were added for 24 h. The concentration of NoV was quantified using the ISO 15216-1 quantitative real-time RT-PCR method in the oyster digestive tissue both before and after the treatment.

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  • * In July 2022, six children experienced these symptoms after eating döner kebab from a takeaway in Turin, prompting a microbiological analysis that revealed high coagulase-positive staphylococci levels.
  • * The analysis confirmed the presence of staphylococcal enterotoxins type B; the contamination likely originated from food handlers, as nasal swabs from them also tested positive for CPS.
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Salmonella is the second most frequent bacterial pathogen involved in human gastrointestinal outbreaks in the European Union; it can enter the food-production chain from animal or environmental sources or from asymptomatic food operators. European food legislation has established microbiological criteria to ensure consumer protection. is listed under both process hygiene criteria and food safety criteria.

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During the last decades, plant-based milk has become very appreciated by consumers, becoming a staple ingredient, especially for alternative breakfasts. Milk contains lactose, which is a sugar hydrolysed by the lactase enzyme. Lactose intolerance and lactose malabsorption are very common food intolerances among individuals.

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On August 2019 a staphylococcal food poisoning outbreak occurred in an elderly home in Piedmont, Italy. The epidemiological investigation performed among the persons that consumed the meal identified chicken salad as the most likely source of the outbreak. Staphylococcus aureus was isolated from a total of seven samples, namely one vomit sample from a guest of the nursing home, two food samples (chicken salad with and without mayonnaise) and nasal swabs collected from a total of four persons working in the kitchen of the nursing home.

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is among the most common causes of foodborne outbreaks in humans in Europe. The global emergence of resistance to antimicrobials calls for close monitoring of the spread and prevalence of resistant strains. In this study, we investigated the occurrence of antimicrobial resistance of serotypes isolated from humans between 2012 and 2021 in Piedmont, northwest Italy.

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  • The study focuses on a coagulase-positive pathogen that poses risks to human health and food safety, particularly due to its ability to survive in a wide temperature range and produce thermostable enterotoxins.
  • Researchers analyzed 3604 food samples over five years (2016-2020) to assess how seasonality and food type affect bacterial counts and enterotoxin presence.
  • Results revealed winter had the highest bacterial counts, while autumn (especially October) had the highest enterotoxin production risk, with dairy products being most vulnerable to contamination.
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Reptile-associated salmonellosis (RAS), infection in humans, is acquired through contact with reptiles. Reptiles have become popular pet animals, and RAS is likely to be an underestimated but growing problem. No epidemiological data about RAS are routinely collected in Italy.

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  • Food safety labs use validated methods to find hidden allergens, crucial for protecting allergic consumers.
  • A real-time PCR test for detecting peanut traces was validated across various food types, including bakery items, meats, and dairy, with a detection limit of 0.5 ppm in most products.
  • The method showed excellent sensitivity (98%) and specificity (100%), with no cross-reactions with other allergens, confirming its robustness and reliability.
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subsp. s (MAP) is the causative agent of chronic proliferative enteritis found in ruminants, known as paratuberculosis (PTB). The spread of PTB is increasing in countries with advanced animal husbandry practices, leading to significant economic losses.

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spp. is an important zoonotic agent. Wild boars might host this pathogen in the intestinal tract and might represent a risk for spp.

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Antibiotic residues in milk are a serious health and technological problem in dairy processes. This study aims to verify the absence of administered antimicrobials after therapeutic treatments, taking into consideration the withdrawal period, and to evaluate the reliability of screening tests under field conditions after confirmatory HPLC-HRMS (High Performance Liquid Chromatography-High-Resolution Mass Spectrometry) Orbitrap analysis. Moreover, the presence of expected or non-targeted metabolites was investigated using the new Compound Discoverer approach.

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  • * A total of 39 C. difficile strains were analyzed, revealing 14 ribotypes that were found in both community-acquired patients and domestic animals, emphasizing a shared environmental connection.
  • * The study's findings indicate that certain ribotypes, especially RT078 and RT020, could suggest that animals may serve as a reservoir for C. difficile, which may contribute to enteric infections in humans.
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Food contamination by staphylococcal enterotoxins (SEs) is responsible for many food poisoning outbreaks (FPOs) each year, and they represent the third leading cause of FPOs in Europe. SEs constitute a protein family with 27 proteins. However, enzyme immunoassays can only detect directly in food the five classical SEs (SEA-SEE).

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Small food businesses, because of their limited resources, are hard pressed to comply with the requirements of a conventional food safety management system (FSMS). To overcome it, the European legislation provides some flexibility in the application of FSMS. With this study, we evaluated the change in the perception and awareness of hazards in food production and in the attitudes of food business operators (FBOs) after a regional regulation was introduced to allow flexibility and a campaign of training activities on the FSMS simplification opportunities.

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Large population studies estimated that the frequency of food allergies is increasing worldwide. In the last two decades, a 'second wave' of the allergy epidemic has emerged as a growing public health problem. EU regulation strengthened information to consumers about allergens in pre-packed food, since December 2014 it has been extended to non-prepacked foods by the Regulation (EU) No 1169/2011 of the European Commission.

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Listeriosis is a foodborne illness characterized by a relatively low morbidity, but a large disease burden due to the severity of clinical manifestations and the high case fatality rate. Increased listeriosis notifications have been observed in Europe since the 2000s. However, the reasons for this increase are largely unknown, with the sources of sporadic human listerioris often remaining elusive.

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In Italy, the Banco Alimentare Onlus manages a network of 8,000 charitable organizations that distribute 67,000 tons of foodstuffs to 1.6 million needy persons. To provide their volunteers with the required food safety knowledge, the Banco Alimentare del Piemonte Onlus commissioned the Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta to hold training courses in food safety.

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spp. has been recognized as an emerging foodborne pathogen and a hazard to human health. In the dairy chain, it has been isolated from different sources, nevertheless data on occurrence in raw milk provided by vending machines are few.

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  • Staphylococcus aureus is a significant human pathogen linked to food poisoning and livestock infections, producing various enterotoxins that can cause illness.
  • This study characterized six enterotoxigenic strains through molecular, phenotypical, and computational techniques, identifying various virulence factors (VFs) and their roles in pathogenicity.
  • The analysis included an examination of plasmids and transposons in these strains, and the strains were also used to produce contaminated cheese, aiding in the screening for staphylococcal enterotoxins and establishing reference material for future studies.
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Campylobacter species are common foodborne pathogens associated with cases of human gastroenteritis worldwide. A detailed understanding of the prevalence, contamination levels and molecular characteristics of Campylobacter spp. in cattle and chicken, which are likely the most important sources of human contamination, is imperative.

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