Departamento de Alimentação e Nutrição
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- 6th International Conference on Food Contaminants: Challenges on Emerging Contaminants and Planetary Health: Book of AbstractsPublication . Vasco, Elsa; Alvito, PaulaThe 6th International Conference on Food Contaminants (ICFC2025), focused on Challenges in Emerging Contaminants and Planetary Health, was held in person from 25–26 September 2025 at the auditorium of the Museu de Eletricidade, Casa da Luz, in Funchal, Madeira, Portugal. The conference addressed the growing challenge posed by emerging contaminants (ECs) in food and the environment, emphasising how their spread through the food chain threatens food safety and public health. Discussions explored policies to reduce exposure to food contaminants, examined the health impacts of chemical and biological contaminants—including occurrence, exposure assessment, and biomonitoring—highlighted advances in analytical methods for detecting emerging contaminants, and considered the full spectrum of their toxicity. These interconnected themes framed a comprehensive dialogue on safeguarding both human health and the wider ecosystem. This multidisciplinary meeting provided a dynamic forum for established experts and early-career researchers to exchange the latest knowledge on food contaminants and their implications for human and planetary health. The scientific programme featured one keynote lecture, five invited lectures, 14 oral presentations, 43 poster presentations, and two round-table discussions. A Best Poster Award was also presented.
- Critérios Microbiológicos: referenciais nacionais e internacionaisPublication . Saraiva, MargaridaCritérios Microbiológicos (referenciais nacionais e internacionais). Análise de causas em caso de resultados não satisfatórios. Casos Práticos. Abordagem dos seguintes tópicos: I Critérios Microbiológicos - Grupos referência. II Critérios Microbiológicos – Objetivos. III. Critérios Microbiológicos - Itens constituintes. IV. Critérios Microbiológicos – Incerteza dos métodos. V. Critérios Microbiológicos - Alguns exemplos. VI. Critérios Microbiológicos - Valores-guia, INSA. VII. Casos Práticos & Exercícios.
- Ensaios microbiológicos/Interpretação de resultadosPublication . Belo Correia, CristinaAvaliação da Qualidade microbiológica. Amostras: alimentos, superfícies do ambiente de preparação e distribuição alimentar, incluindo mãos de manipuladores de alimentos; Colheita da amostra testemunha e de amostras para vigilância da qualidade microbiológica; Parâmetros microbiológicos: indicadores de alteração, indicadores de higiene e patogénicos. Casos Práticos
- Genomic diversity of Enterobacteriaceae on food-processing surfaces: an overlooked non-clinical setting with public health implicationsPublication . Peixoto, Andreia; Nova, Lúcia; Mourão, Joana; Matos, Cátia; Santos, Susana; Rodrigues, João; Saraiva, Margarida; Correia, Cristina Belo; Batista, Rita; Peixe, Luísa; Novais, Carla; Antunes, PatríciaBacterial hazards on contaminated surfaces in food-processing environments pose significant food safety risks. Hygiene monitoring of surfaces in direct or indirect contact with food typically relies on a limited set of bacterial indicators, such as Enterobacteriaceae counts. However, their genomic diversity remains poorly characterised. The aim of this study was to provide a comprehensive genomic characterisation of Enterobacteriaceae recovered from food-contact surfaces after cleaning and disinfection with biocides in foodservice units. Diverse strains were identified, with some STs shared across samples and/or foodservices. - A diverse Enterobacteriaceae population persists on food-contact surfaces even after cleaning and disinfection with biocides, with evidence of cross-contamination. - These surfaces represent critical points of contact for strains that are genetically similar to those circulating in food, environment, and human clinical sources, including strains carrying clinically relevant AMR genes. - Further research is needed to understand the factors driving their persistence and dissemination in foodservice environments, aiming to enhance food safety risk management protocols and protect public health.
- Higiene das superfícies em ambientes alimentares: desafios com a eficácia dos biocidas e a diversidade microbianaPublication . Peixoto, AndreiaA resistência antimicrobiana resulta da perda de eficácia dos antimicrobianos no controlo de microrganismos, constituindo uma ameaça global à saúde pública, à produção alimentar e ao ambiente. O uso inadequado de antibióticos e biocidas favorece a seleção de estirpes resistentes, reforçando a importância de práticas de higiene alimentar eficazes, especialmente na restauração, onde a ação dos biocidas pode ser comprometida por condições inadequadas de uso. A presença de bactérias indicadoras de higiene persistentes em superfícies de contacto com alimentos, mesmo após procedimentos de limpeza e desinfeção, evidencia fenómenos de contaminação cruzada. Estas superfícies constituem pontos críticos de contacto para estirpes geneticamente semelhantes às que circulam em alimentos, no ambiente e em fontes clínicas humanas. Esta realidade sublinha a necessidade de reforçar a higienização e a monitorização, de modo a reduzir a disseminação de microrganismos resistentes e assegurar a segurança alimentar.
- Hygiene challenges in Foodservice Units: Biocide efficacy and bacterial diversity across surfacesPublication . Peixoto, Andreia; Santos, Susana; Rodrigues, João; Saraiva, Margarida; Correia, Cristina Belo; Batista, Rita; Novais, Carla; Antunes, PatríciaContaminated surfaces in food-processing environments represent a significant food safety risk, making the monitoring of hygiene on hands and food-contact surfaces a priority. This study aimed to assess the occurrence and diversity of hygiene indicator bacteria in Portuguese foodservice facilities and to evaluate their association with biocide use. A total of 1,128 hand and surface samples were collected from 107 facilities, with bacterial identification performed by MALDI-TOF-MS and information gathered on the type and concentration of biocides used. More than half of the samples showed unsatisfactory hygiene results, mainly due to high total viable counts and Enterobacteriaceae levels. Forty bacterial species were identified, with Enterobacter cloacae, Klebsiella pneumoniae and Klebsiella oxytoca being the most prevalent. Hygiene performance varied according to the type of biocide applied, with quaternary ammonium compound-based products showing greater effectiveness. Despite appropriate biocide concentrations, the persistence and diversity of bacteria highlight the need to further investigate microbial susceptibility and persistence in order to improve hygiene practices.
- Lista de Verificação, INSA - Avaliação das condições em Unidades de Alimentação ColetivaPublication . Maia, Carla; Santos, SusanaApresentação de divulgação e atualização: Atividades essenciais do Laboratório de Microbiologia dos Alimentos. Vigilância microbiológica em unidades de alimentação coletiva. Análise da estrutura e dos diferentes módulos que compõem a a Lista de Verificação INSA. Aplicação da Lista de Verificação INSA em Unidades de alimentação coletiva, para avaliação das condições das instalações, dos equipamentos e dos procedimentos. Apresentação e análise dos resultados relativos a 2023 e 2024.
- Nutrition remains a top priority in Ukraine despite the ongoing war: the fight against trans fatsPublication . Gonzales, Gerard Bryan; Fino Alberto da Motta, Carla Alexandra; Farrand, Clare; Habicht, Jarno; Kuriata, Olena; Phyo, Pyi Pyi; Skipalskyi, Andrii; Wickramasinghe, KremlinDespite the ongoing war, nutrition remains a top priority in Ukraine. In collaboration with the WHO, Ukraine remains steadfast in its mission to eliminate trans fats in the food supply as a measure to reduce non-communicable diseases in the country. Ukraine has passed legislation on the monitoring and regulation of trans fats in foods, and WHO has been supporting the country in building laboratory capacity to achieve this goal.
- Nutritional composition of ultra-processed plant-based foods in the out-of-home environment: a multi-country survey with plant-based burgersPublication . Vellinga, Reina E.; Rippin, H.L.; Gonzales, G.B.; Temme, E.H.M.; Farrand, C.; Halloran, A.; Clough, B.; Wickramasinghe, K.; Santos, M.; Fontes, T.; Pires, M.J.; Nascimento, A.C.; Santiago, S.; Burt, H.E.; Brown, M.K.; Jenner, H.K.; Alessandrini, R.; Marczak, A.M.; Flore, R.; Sun, Y.; Motta, C.Ultra-processed plant-based foods, such as plant-based burgers have gained in popularity. Particularly in the out-of-home (OOH) environment, evidence regarding their nutritional profile and environmental sustainability is still evolving. Plant-based burgers available at selected OOH sites were randomly sampled in cities of four WHO European Member States; Amsterdam, Copenhagen, Lisbon, and London. Plant-based burgers (patty, bread and condiment) (n=41) were lab-analysed for their energy, macronutrients, amino acids, and minerals content per 100g and serving, and were compared with reference values. For the plant-based burgers, the median values per 100g were: 234 kcal, 20.8g carbohydrates, 3.5g dietary fibre, and 12.0g fat, including 0.08g TFA and 2.2g SFA. Protein content was 8.9g/100g, with low protein quality according to amino acid composition. Median sodium content was 389mg/100g, equivalent to 1g salt. Compared with references, the median serving of plant-based burgers provided 31% of energy intake based on a 2,000 kcal per day, and contributed to carbohydrates(17-28%), dietary fibre(42%), protein(40%), total fat(48%), SFA(26%), and sodium(54%). One serving provided 15-23% of the reference values for calcium, potassium, and magnesium, while higher contributions were found for zinc(30%), manganese(38%), phosphorus(51%), and iron(67%). The ultra-processed plant-based burgers, provide protein, dietary fibre and essential minerals, but also contain relatively high levels of energy, sodium, and total fats. The amino acid composition of the plant-based burgers indicated low protein quality. The multifaceted nutritional profile of plant-based burgers highlights the need for manufacturers to implement improvements to better support healthy dietary habits. These improvements should include reducing energy, sodium and total fats.
- Surface hygiene in food environments: challenges with biocide efficacy and bioindicatorsPublication . Peixoto, Andreia; Matos, Cátia; Santos, Susana; Rodrigues, João; Saraiva, Margarida; Belo Correia, Cristina; Batista, Rita; Peixe, Luísa; Novais, Carla; Antunes, PatríciaThe presence of bacterial hazards on contaminated surfaces in food-processing environments poses significant food safety risks. Monitoring and hygiene verification of surfaces in direct or indirect contact with food remains a top priority for food business operators. Sanitation uses antimicrobial compounds, biocides (disinfectants/antiseptics), whose effectiveness on surface microbiota depends on microorganisms’ susceptibility and factors such as concentration and contact time. The aim of this stydy was to assess the post-disinfection occurrence and diversity of hygiene indicator bacteria on kitchen surfaces of Portuguese foodservice facilities and correlate their presence with biocide usage. Despite recommended biocide use, poor hygiene of surfaces in direct or indirect contact with food was observed. The presence of diverse, potentially pathogenic and recurrent bacterial species suggests persistence, reintroduction, and/or cross-contamination. Identifying phenotypic and genetic markers of persistence, including biocide susceptibility, is crucial for developing real-time hygiene bioindicators and ensuring food safety.