The development of high-throughput omics technologies represents an unmissable opportunity for evidence-based prevention of adverse effects on human health. However, the applicability and access to multi-omics tests are limited. In Italy, this is due to the rapid increase of knowledge and the high levels of skill and economic investment initially necessary. The fields of human genetics and public health have highlighted the relevance of an implementation strategy at a national level in Italy, including integration in sanitary regulations and governance instruments. In this review, the emerging field of public health genomics is discussed, including the polygenic scores approach, epigenetic modulation, nutrigenomics, and microbiomes implications. Moreover, the Italian state of implementation is presented. The omics sciences have important implications for the prevention of both communicable and noncommunicable diseases, especially because they can be used to assess the health status during the whole course of life. An effective population health gain is possible if omics tools are implemented for each person after a preliminary assessment of effectiveness in the medium to long term.

Healthcare associated infections (HAIs) are a major public health concern both in acute hospitals and long-term care facilities (LTCFs), considering the clinical presentations and related costs. The study describes the first regional experience on HAIs and antimicrobials consumption obtained through point prevalence survey (PPS) 2016-2017 in the "Antonio Cardarelli" acute hospital, and in the LTCF of Larino municipality (Healthcare-associated infections and Antimicrobial use in European Long-Term care facilities, HALT-3) of Molise Region, Central Italy, both coordinated by the European Center for Disease Control (ECDC). PPS was carried out during 24-26 November 2016, while HALT-3 on 29 June 2017. Standardized protocols and software provided by ECDC were used to collect facilities information, patients/residents, HAIs and antibiotic consumption data. An active HAI was found in 16 (7.1%) of 224 admitted patients in the acute hospital, and 50% occurred in a clinical specialty ward. Bundles, checklist for HAIs prevention and antimicrobial stewardship were lacking. Among 29 LTCF residents the HAIs prevalence was 3.4%. Surveillance programs for HAIs and antimicrobial stewardship strategy were not available. The overall results identified the need and types of interventions to be implemented in both settings, either at organizational or individual level, to improve antibiotic prescription practice and limit risk factors involved in potentially preventable infections.

Listeria monocytogenes virulence depends on the activity of well-characterized virulence factors. In this study, transcription levels of inlA, inlB, hly, bsh and prfA genes in L. monocytogenes strains, and the ability of invasion into CaCo-2 cells were investigated. Serotyping, multiplex-PCR for serovar identification and restriction fragment analysis of inlA were performed. Transcription levels and invasiveness were evaluated by quantitative reverse-transcription PCR and by in vitro assays, respectively. The isolates were of serovars 1/2a, 4b, 1/2c, 1/2b and 3a. Full-length inlA profiles were found for nine of ten clinical isolates, while five of seven cultures from foods showed truncated profile. The analysis of transcription levels of virulence factors encoding genes demonstrated a substantial inter-strain heterogeneity, with clinical strains showing higher levels for almost all genes than isolates from food. A correlation between transcription levels of inlA and inlB, as well as between bsh and prfA, was observed. Significant differences between clinical strains and food isolates in the invasion of CaCo-2 cells were found. Analysis of gene transcription and invasiveness of human cells suggests different virulence phenotypes among L. monocytogenes populations, and this characterization could be a useful tool for risk assessment purposes and for the development of public health strategies.

This study describes a SARS-CoV-2 outbreak caused by the Delta (B.1.617.2) variant in a nursing home in Central Italy during October–November 2021. Trained interviewers collected data from residents, staff, and administration officers with an agreed informed consent procedure. Thirty-two (44.5%) out of 72 residents (median age 89 years) and six (26.1%) of 23 healthcare workers were found to be infected with SARS-CoV-2. Infections occurred more often among residents with a higher index of independence in daily living activities, suggesting an increased risk for those with more interactions. Twenty-five infected residents (78.1%) received the booster dose of mRNA anti-COVID-19 vaccine > 7 days before SARS-CoV-2 onset. Half of the infected residents had mild symptoms, and only three required hospitalisation, one of whom died from COVID-19 complications. The study underlines the effectiveness of a booster dose in providing a high protection against severe disease and hospitalisation even among vulnerable individuals infected with the Delta variant of concern.