Colonization and infection due to carbapenemase-producing Enterobacteriaceae in liver and lung transplant recipients and donor-derived transmission: a prospective cohort study conducted in Italy.

OBJECTIVES: A prospective cohort study was conducted in Italy in order to describe the microbiologic aspects of colonization/infection by carbapenemase-producing Enterobacteriaceae (CPE) in donors and recipients of lung and liver transplants and the possible CPE transmission from donors to recipients. METHODS: Between 15 January 2014 and 14 January 2015, all recipients of solid organ transplants (SOT) at ten lung and eight liver transplantation centres and the corresponding donors were enrolled. Screening cultures to detect CPE were performed in donors, and screening and clinical cultures in recipients with a 28-day microbiologic follow-up after receipt of SOT. Detection of carbapenemase genes by PCR, genotyping by multilocus sequence typing, and pulsed-field gel electrophoresis and whole-genome sequencing were performed. RESULTS: Of 588 screened donors, 3.4% were colonized with CPE. Of the liver first transplant recipients (n = 521), 2.5% were colonized before receipt of SOT and 5% acquired CPE during follow-up. CPE colonization was higher in lung first transplant recipients (n = 111, 2.7% before SOT and 14.4% after SOT). CPE infections occurred in 1.9% and 5.3% of liver or lung recipients, respectively. CPE isolates were mostly Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae belonging to CG258. Three events of donor-recipient CPE transmission, confirmed by whole-genome sequencing and/or pulsed-field gel electrophoresis, occurred in lung recipients: two involving K. pneumoniae sequence type 512 and one Verona integron-encoded metallo-ß-lactamase (VIM)-producing Enterobacter aerogenes. CONCLUSIONS: This study showed a low risk of donor-recipient CPE transmission, indicating that donor CPE colonization does not necessarily represent a contraindication for donation unless colonization regards the organ to be transplanted. Donor and recipient screening remains essential to prevent CPE transmission and cross-infection in transplantation centres.

The Italian national surgical site infection surveillance programme and its positive impact, 2009 to 2011.

Programmes surveying surgical site infection (SSI) have been implemented throughout the world and are associated with a reduction in SSI rates. We report data on non-prosthetic surgery from the Italian SSI surveillance programme for the period 2009 to 2011. Participation in the programme was voluntary. We evaluated the occurrence of SSI, based on protocols from the European Centre for Disease Prevention and Control, within 30 days of surgery. Demographic data, risk factors, type of surgery and presence of SSI were recorded. The National Coordinating Centre analysed the pooled data. On 355 surgical wards 60,460 operations were recorded, with the number of surveyed intervention doubling over the study period. SSI was observed in 1,628 cases (2,6%) and 60% of SSI were diagnosed through 30-days post discharge surveillance. Operations performed in hospitals with at least two years of surveillance showed a 29% lower risk of SSI. Longer intervention duration, American Society of Anesthesiologists' (ASA) score of at least three, and pre-surgery hospital stay of at least two days were associated with increased risk of SSI, while videoscopic procedures had reduced SSI rates. Implementation of a national surveillance programme was helpful in reducing SSI rates and should be prioritised in all healthcare systems.

Infections and antimicrobial resistance in long term care facilities: a national prevalence study.

BACKGROUND: A point prevalence survey (PPS) was conducted in Italy in 2010, as part of the first European PPS in Long Term Care Facilities (LTCFs), conducted within the HALT Project. METHODS: The PPS was aimed at estimating the prevalence of infections, antimicrobial resistance, and antibiotic use and to assess the status of infections control programs in this setting. RESULTS: Ninety two LTCFs, located in 11 different Italian regions, participated to the study: 9391 residents were enrolled, 9285 of whom were eligible according to the study criteria. The prevalence of residents with signs/symptoms of infection was 6.5% (606 residents); 438 residents were on antimicrobial treatment (4.7%) and 526 had signs/symptoms (5.7%) but in 324 residents only (3.5/100 residents) the infection satisfied the modified McGeer criteria and was considered confirmed. The most frequent infection site was the respiratory tract (1.27/100 residents). Mostly of the antibiotics were prescribed for respiratory tract infections (42.8% of the antibiotics) and for urinary tract infections (26.6%). The most frequently prescribed classes were quinolones, followed by penicillin plus beta-lactamase inhibitor and 3rd generation cephalosporins. Few infection had a microbiological confirmation, but among the 143 isolated microorganisms 24% were multidrug resistant. CONCLUSIONS: The burden of infections and antimicrobial resistance in LTCFs is significant and infection control and surveillance program are urgently needed.

Antibiotic treatments for children ages 0-23 months in a northern Italy region: a cohort study.

BACKGROUND: This study aims to describe the pattern of antibiotic treatments in the community for children ages 0-23 months in Emilia-Romagna (a northern Italy region) pointing out possible changes of prescribed agents when first treatments in the life of each children are compared to successive ones. MATERIALS AND METHODS: The Regional Drug Prescription and the Resident Population databases were used as data sources to study the cohort of children born between January 1 and December 31, 2000 and resident in Emilia-Romagna. RESULTS: The cumulative incidences of children with at least one treatment were 22%, 55% and 82% at 6, 12 and 24 months of age, respectively. Broad spectrum penicillins were the most prescribed antibiotic class for children at their first treatment while cephalosporins were the most prescribed class for successive treatments and when pooling all treatments. CONCLUSION: Cephalosporins and other second line antibiotics are frequently prescribed to 0 to 23-month-old residents in Emilia-Romagna even when only first treatments are considered; further research is needed to quantify inappropriateness of antibiotic prescription.

[Surgical chemoprophylaxis in the Emilia Romagna region]. / Profilassi antibiotica in chirurgia nella regione Emilia Romagna.

The aim of this study is to assess the compliance with evidence based medicine of the practices of administration of perioperative surgical chemoprophylaxis in the Emilia Romagna region. Prospective study of 1 month duration including 31 of the 36 public hospital existing in the region. For all the patients admitted to one of the 121 participating units and undergoing a surgical operation, data were collected on the surgical prophylaxis administered, including type of antibiotic, time of administration and duration. Surgical prophylaxis was given in 4,946 surgical operations of the 6,167 included in the study. The median frequency of surgical prophylaxis administration was 81% ranging from 67% to 97% in different Local Health Authorities. Chemoprophylaxis was given also for surgical operations where, according to systematic literature reviews, the cost-benefit ratio is absolutely unfavourable to the use of antibiotics. In 2,120 cases (42.9%) the time of administration was not perioperative and, thus, differed from the recommended practice: in 264 cases (5%), antibiotics were administered after the operation. In 42.6% of the cases the duration of administration was not a short-term prophylaxis, being longer than 24 hours: in these 2,108 cases, the median duration was 4 days ranging form 1 to 90 days. In 48% of the cases cefazolin was administered; in 1,347 cases (23.4%), instead, a third or fourth generation cephalosporin was used. The survey pointed out an overuse of antibiotics, both for indications and duration, even when clear evidences of efficacy are lacking; moreover, the criteria for selection of specific antibiotics frequently did not take into account the risk of selecting antimicrobial resistance strains.

Can hospital discharge diagnoses be used for surveillance of surgical-site infections?

The aim of this study was to assess the data quality of postoperative infections in a hospital discharge registry in the Emilia-Romagna region of Italy. Data from a prospective regional study of postoperative infections in 6158 patients from 31 of the 36 public hospitals of the region were compared with data from the regional hospital discharge registry, using different classes of ICD-9-CM codes. The sensitivity of the hospital discharge database for postoperative surgical infections was 10% when ICD-9-CM codes directly indicative of postoperative infectious complications were used. When non-specific codes of postoperative complications, not necessarily of infectious origin, were added, the sensitivity reached 21%. At present, the hospital discharge registry is not suited for surveillance of hospital-acquired infection.