Effect of ClO2 on the distribution of Legionella pneumophila serogroups in a Teaching Hospital

The prevention of Legionella colonization of water systems is one of the goals of hospital management. Among chemical disinfection methods, chlorine dioxide (ClO2) has been largely used to control Legionella in water systems. We analysed the distribution of Legionella pneumophila serogroups (sg) and Legionella other spp before (PRE) and after (POST) installation of chlorine dioxide (ClO2) continuous disinfection systems in a Teaching Hospital in Rome.

According to the Italian National Guidelines, our surveillance plan involved a systematic sampling of the water system. The sampling was performed from Jan. 2010 to Dec. 2019. From 2011 to 2019, ClO2 continuous disinfection systems were installed in all hot water system of the hospital, and maintained at a concentration of 0.25 mg/l at the end point. The isolated strains of Legionella were first serotyped using a kit that identifies sg1, other species and that discriminate sg from 2 to 15.

1505 hot water samples were collected from the Hospital and analysed. 363 samples are PRE and 1142 are POST activation of ClO2. Only the 16.74% of monitored sampling points were colonized by Legionella during the study period. This percentage decrease from 31.40% of PRE samples, to 12.08% of POST samples (p ≤ 0.000). The sg isolated were: sg3 (60.31%), sg8 (17.12%), sg1 (16.73%), sg6 (1.95%) and other species (3.89%). Comparing the distribution of sg between the PRE and POST samples, the sg8 showed a high increase (+136.84%) and the sg3 a slight decrease (-17.94%). These variations were statistically significative.

The results showed a predominance of Legionella pneumophila sg3, compared to what was observed in a multicenter study conducted between different hospitals of various regions of Italy, where sg6 was the major isolate. The ClO2 affect the distribution of sg, in particular for sg8. This interesting result will be further investigated.

Key messages

Our data deriving from an environmental monitoring plan, show that the ClO2 affects the distribution of Legionella’s serogroups. The ClO2 reduces the percentage of samples colonized by Legionella. The ClO2 reduces the percentage of samples colonized by Legionella.

FLUChallenge: an innovative strategy to increase flu vaccination in two Italian Teaching Hospitals

In Europe flu vaccination among healthcare workers (HCWs) is strongly recommended even though not mandatory such as elsewhere (USA). Despite this, vaccination coverage in EU countries is usually low: 30.2% in 2016-17. In Italy, at the end of the same season it was 15.6%. Aim of this study is to describe and evaluate the new strategy adopted by Gemelli and Humanitas Research Hospitals, two Italian Teaching Hospitals (THs) part of the MIRO Public Health Center, to increase the vaccination coverage among their HCWs.

Before the 2019-20 campaign, experts of the two THs met up to identify a common strategy to promote flu vaccination among HCWs in addition to the ones already implemented. It was decided to launch a FLUChallenge: a platform of monitoring updated bi-weekly and available on the THs' internal websites with the vaccination coverage overall and stratified by job category and macro-areas of activity. Descriptive and inferential analysis were performed.

Preliminary Results

6673 HCWs included (4241 Gemelli, 2432 Humanitas). The overall flu vaccination coverage at the end of the 2019-20 campaign was 28.4% (1026 HCWs vaccinated Gemelli, equal to 24.2%; 869 HCWs vaccinated Humanitas, 35.7%). Both THs significantly increased the vaccination coverage compared to the previous year (+10% Gemelli, 22% in 2018-19, p = 0.01; +45.7% Humanitas, 24.5% in 2018-19, p < 0.001). Physicians had the highest coverage both in Gemelli (483/1320, 36.6%) and Humanitas (443/979, 45.2%), while the lowest was registered among nurses in Gemelli (357/2017, 17.7%) and other HCWs in Humanitas (134/605, 22.1%). Infectious disease was the macro-area with highest coverage in Gemelli (32.3%), while in Humanitas the emergency department (63.9%).

The FLUChallenge intervention was an effective strategy to increase flu vaccination coverage in the two TH. The website platform was useful for the purpose of accountability and able to create a positive challenge between the HCWs working in the two THs involved.

Key messages

Flu vaccination among healthcare workers (HCWs) is recommended to prevent influenza and to avoid its transmission. It is important to promote new engagement and innovative strategies to increase flu vaccination coverage among HCWs, when it is not mandatory.

Flu vaccination coverage among healthcare workers: the example of younger generations

Flu vaccination is highly recommended among Healthcare Workers (HCWs). The low coverage in Italy among HCWs (mean 15.6% for 2016/17 flu season, ECDC) calls for new approaches. The aim of this study was to evaluate in which measure the vaccination coverage among HCWs registered during the 2019-2020 flu vaccination campaign in a large Teaching Hospital in Rome was affected by age and education.

A retrospective observational quasi-experimental study was conducted. Descriptive and inferential statistical analysis (chi-square test, significance level of 0.05) were performed. The 2019-2020 flu vaccination campaign was aimed at more than 4000 employed HCWs (total coverage 24.2%). Vaccination was also extended to not-employed HCWs such as Medical Residents (MRs) and Medical Students (MSs) in clinical training. The coverage in this groups was higher (46.0% and 63.2% respectively) and the difference between them and the coverage among employed HCWs was statistically significant (p < 0.05); Further analysis was performed comparing MRs / MSs in clinical training with their respective professional group of employed HCWs, with a percentage of vaccinated Medical Doctors (MD) of 36.6%. MRs / MSs in clinical training coverage was higher than MDs coverage and the difference still proved to be statistically significant (p < 0.05).

The higher coverage among MRs / MSs in clinical training could be explained, in general, in light of the more open-mindedness to prevention and to healthy lifestyles that characterizes young people with an up-to-date education. It could also be explained considering the specific culture and sense of responsibility of Medical Students and Medical Residents towards their high-demanding educational path and clinical training as an incentive not to get ill.

Flu vaccination is highly recommended among HCWs. Younger generations, who represent the future of Healthcare, prove to be more open-minded and responsible towards good prevention practices such as this.

Key messages

Flu vaccination is highly recommended among HCWs. Younger generations, who represent the future of Healthcare, prove to be more open-minded and responsible towards good prevention practices.

Acute uncomplicated diverticulitis: key points for early management. A single-centre retrospective study

OBJECTIVE

Acute uncomplicated diverticulitis is an important clinical condition usually managed in clinical practice with antibiotic therapies and hospitalization in ward. In this setting, recent papers and guidelines suggest to limit the use of antibiotics in selected cases and encourage an early discharge in low-risk patients. The purpose of this retrospective study is to identify serological inflammatory markers and CT findings of acute uncomplicated diverticulitis (AUD) at the onset of the disease and the correlation with the need for in-patient or out-patient management.

PATIENTS AND METHODS

It was used a database drawn from the collection of the patients admitted to our Emergency Room from January 2016 to 2019 and undergoing urgent abdominal CT-scan for suspicious of acute diverticulitis. For each patient we considered biochemical and radiological parameters at the onset of the disease and if patients were managed as in-patients (hospitalization in ward) or as out-patient (early discharged or after observation in Short Stay Unit).

RESULTS

Among patients with early diagnosis of AUD, 108 (65%) were hospitalized in ward with mean time of in-stay of 6.94 days, while only 58 (35%) patients with same diagnosis were managed as out-patient and early discharged from emergency room or after observation in short stay unit with a mean time of in-stay significantly shorter (3.39 days, p-value 0.0007). Higher levels of C reactive protein and the length of colon involved considered as percentage (%) in comparison with the entire colon were significantly related to the need for hospitalization (p-value 0.03).

CONCLUSIONS

Biochemical parameters and a more advanced radiological evaluation, as the length (%) of colon involved, could allow a stratification of patients with diagnosis of AUD at the admission and help physicians in the early management.

Flu vaccination coverage in a large Italian teaching hospital: the example of the leaders

Key messages

Annual flu vaccination among healthcare workers (HCWs) is recommended to prevent influenza and to avoid its transmission especially to frail patients. This study shows the growing flu vaccination coverage rate in our teaching hospital and the effectiveness of the example given by the vaccinated leaders in increasing the coverage among all HCWs.

A six-years point prevalence survey of healthcare-associated infections in an Italian hospital

Key messages

Point prevalence from 2013 to 2018 seems to be stable. An accurate incidence survey is needed in order to identify the main risk factors of HAI and to realize more specific hospital programmes. Length of stay at the moment of detection is useful to meaningfully predict HAIs prevalence although the cause-and-effect relationship is still not clear.

Knowledge, attitudes and behaviors of the Italian population towards Neisseria meningitidis, Streptococcus pneumoniae and HPV diseases and vaccinations: A cross-sectional multicentre study

OBJECTIVES

This study addressed knowledge of Streptococcus pneumoniae, Neisseria meningitidis and human papillomavirus (HPV), and attitudes and behaviours towards vaccines against them.

STUDY DESIGN

This is a cross-sectional, multicentre study.

METHODS

Data were collected through a questionnaire administered to 530 adults who accessed four Departments of Prevention of the Italian National Health Service in 2013.

RESULTS

Less than 50% of people gave the right answer to all the questions concerning the three diseases, but 96.2%, 94% and 92.7% agreed with the importance of vaccination against N. meningitidis, S. pneumoniae and HPV, respectively, and 58.4% expressed own willingness to have their children vaccinated with N. meningitidis B vaccine. The attitude towards vaccination was more positive in women for N. meningitidis and in people having children for HPV. Furthermore, individuals giving correct answers to all knowledge items were more in favour of both HPV and S. pneumoniae vaccination. A total of 68.8%, 82.6% and 84.5% of respondents vaccinated their own children against N. meningitidis C, S. pneumoniae and HPV, respectively. About 50% of the respondents reported paediatricians' or other health professionals' recommendations as the main reason for vaccination.

CONCLUSIONS

Vaccinations may be promoted through actions aimed at increasing citizens' knowledge. Health professionals should be educated to actively provide information on vaccinations in a clear, comprehensive and effective way.