PCDD/Fs and PCBs in Mytilus galloprovincialis from a contaminated area in Italy: the role of mussel size, temperature and meteorological factors.

Mussels represent a food at risk of contamination because they are filter-feeding organisms with high bioaccumulation and low biotransformation potential for organic contaminants. Taranto, Southern Italy, is of particular relevance in this context due to the presence of industrial sources of POPs. The aim of this study was to analyse the role of mussel size, temperature and other meteorological factors in determining PCDD/Fs and PCBs concentrations in mussels. Mussels were collected on a monthly basis with random sampling between 2012 and 2020 according to the extraordinary monitoring plan of the Prevention Department. Samples were analysed by the National Reference Laboratory for Halogenated POPs in food and feed. A total of 787 mussel samples were collected between 2012 and 2020. Higher median concentrations were observed in Mar Piccolo First Inlet: PCDD/Fs 1.49 pg WHO-TEQ/g ww; PCDD/Fs + DL-PCBs 6.35 pg WHO-TEQ/g ww; DL-PCBs 4.74 pg WHO-TEQ/g ww; NDL-PCBs 65.10 ng/g ww. In all basins, PCDD/Fs + DL-PCBs, DL-PCBs and NDL-PCBs showed higher concentrations in mussels ≥ 5 cm. Temperature showed positive association with all pollutants in all basins. Higher relative humidity was associated with higher concentrations of some pollutants, while number of rain days was associated with lower values. Our findings showed higher PCDD/Fs and PCBs concentrations in adult mussels, with dependence on temperature and some other meteorological factors. These results could help guide public health strategies and mussel sampling according to mussel size and meteorological conditions in areas affected by POPs contamination.

Dioxins and PCBs contamination in milk and dairy products from Province of Taranto (Puglia Region, Southern Italy): a six years spatio-temporal monitoring study.

INTRODUCTION: Taranto Province (Puglia Region, Southern Italy) is of particular Public Health relevance due to the presence of industrial sources of dioxins and PCBs. The aim of this study was to analyze the spatio-temporal distribution of these pollutants in milk and cheese produced from 2013 to 2018. MATERIALS AND METHODS: Raw milk and dairy products were sampled in the farms located within 20 km from the industrial area. RESULTS: 1005 milk samples were collected. Median (IQR) concentrations were: dioxins 0.21 (0.21) pg WHO-TEQ/g fat; dioxins+DL-PCBs 0.83 (0.71) pg WHO-TEQ/g fat; NDL-PCBs 1.92 (1.56) ng/g fat. Overall, only 6 (0.6%) samples were found to be non-compliant for at least one pollutants group. Temporal analysis showed a decreasing trend in dioxins and PCBs concentrations over the observed years and higher values in the first trimester. Spatial analysis showed higher levels of PCBs in areas closest to the industrial pole. 70 dairy products samples were collected. Median pollutants concentrations were far below the EU limits and no exceedances were observed. CONCLUSIONS: The extremely low number of exceedances appeared as an encouraging result and supported the validity of the Public Health measures adopted by the Department of Prevention of Taranto.

Dioxins and PCBs contamination in mussels from Taranto (Ionian Sea, Southern Italy): a seven years spatio-temporal monitoring study.

INTRODUCTION: Taranto is of particular Public Health relevance for the presence of industrial sources of dioxins and PCBs. The aim of this study was to monitor these pollutants in mussels produced from 2012 to 2018. MATERIALS AND METHODS: Mussels were collected on a monthly basis with random sampling. Concentrations were determined through accredited methods. RESULTS: 622 samples were collected. Dioxins and PCBs showed higher median concentrations in Mar Piccolo 1st Inlet (p s <0.0001; Dioxins: 1.43 pg WHO-TEQ/g ww; Dioxins+DL-PCBs: 5.98 pg WHO-TEQ/g ww; DL-PCBs: 4.57 pg WHO-TEQ/g ww; NDL-PCBs: 61.54 ng/g ww) and in III trimester for all basins (p s <0.02). In Mar Piccolo 1 st Inlet, there was a linear increase of dioxins and PCBs moving North (p s <0.05). CONCLUSIONS: These findings confirmed higher concentrations in Mar Piccolo 1 st Inlet during the summer period and supported the validity of the Public Health measures adopted by the Department of Prevention of Taranto.

Compliance with immunization and a biological risk assessment of health care workers as part of an occupational health surveillance program: The experience of a university hospital in southern Italy.

BACKGROUND: The active immunization of health care workers (HCWs) is a primary measure to prevent nosocomial infection; despite this, vaccine coverage among HCWs in most countries is low. To increase vaccine coverage in the health care setting, the hygiene and occupational medicine departments of Bari Policlinico General University-Hospital implemented a vaccination procedure. This operative procedure requires that during the occupational medical examination, all employees are evaluated for immunity/susceptibility to vaccine-preventable diseases, with vaccination offered to those determined to be susceptible. METHODS: The study sample comprised HCWs who attended the biological risk assessment program from December 2017 to January 2019 (n = 449). RESULTS: Susceptibility was higher for hepatitis B virus (23%), followed by rubella (11%), varicella (9%), mumps (8%), and measles (7%). The seroconversion rate after the administration of booster dose(s) was >80% for all vaccines. Overall, 15% of the HCWs refused the offered vaccine(s), and the main determinants of vaccination compliance were younger age (P < .0001) and being a physician (P < .05). DISCUSSION: Despite the several recommendations and campaigns to promote vaccinations, achieving high immunization rates among HCWs is still a challenge. CONCLUSIONS: In this scenario, public health institutions have to choose between the enforcement of the promotion or the adoption of a mandatory policy.