A survey of methicillin-resistant Staphylococcus aureus control strategies in Italy.

PURPOSE: Data regarding the implementation of state-of-the-art methicillin-resistant Staphylococcus aureus (MRSA) control procedures in Italy are lacking. There is a need to evaluate compliance with MRSA recommendations (CR) in Italian hospitals. METHODS: A 67-question closed-answer survey was sent to all Italian hospitals, in order to analyze and evaluate program consistency with CR [hand hygiene (HH), contact precautions, screening of high-risk patients, decolonization, feedback on surveillance data, and antimicrobial guidelines and education programs]. RESULTS: 205 hospitals, which account for 42 % of national admissions, returned questionnaires. 131 hospitals (64 %) did not have written MRSA control guidelines. Hospitals reported the following levels of compliance with CR: (1) HH: 67 hospitals (33 %); (2) contact precautions: 33 (16 %); (3) MRSA screening: 66 (32 %); (4) MRSA decolonization: 42 (20 %); (5) surveillance data feedback: 87 (43 %); and (6) antimicrobial guidelines and education programs: 41 (20 %). One hospital (0.5 % of responses) had implemented all recommendations and 28 hospitals (14 %) had implemented four or five recommendations. 31 % of hospitals surveyed had implemented none. Multivariate analysis showed that the only factor identified as being associated with the implementation of MRSA control recommendations was the number of meetings/year of the infection control team (ICT) (p = 0.004). CONCLUSIONS: Written MRSA control guidelines are available in only one-third of Italian facilities. An organized system, with ≥4 interventions, has been implemented in just 1 out of 7 hospitals. HH programs and ICT activity are related to better MRSA control. In Italy, there is significant opportunity for improvement in MRSA control.

Outbreak of skin and soft tissue infections in a hospital newborn nursery in Italy due to community-acquired meticillin-resistant Staphylococcus aureus USA300 clone.

BACKGROUND: Community-acquired meticillin-resistant Staphylococcus aureus (CA-MRSA) is responsible for severe infections in previously healthy people acquired in the community in different areas of the world. AIM: To report an outbreak of CA-MRSA in a hospital newborn nursery in northern Italy in September-October 2010, its investigation and control measures. METHODS: The epidemiology of the outbreak is reported. The investigation included screening neonates, parents and staff for MRSA carriage. Molecular strain typing was performed on MRSA isolates. FINDINGS: The outbreak affected nine neonates with three severe infections. In addition, four mothers had postpartum mastitis, and three mothers and one father had skin infection. The outbreak strain belonged to the USA300 CA-MRSA clone. Asymptomatic carriage of the outbreak strain was found among neonates, parents and hospital staff. The implementation of appropriate infection control measures in the hospital terminated the outbreak. CONCLUSIONS: To our knowledge, this is the first report of a hospital outbreak caused by the USA300 CA-MRSA clone in Europe. It is important to reinforce infection control measures, particularly in high-risk groups, such as neonates, to prevent USA300 from becoming endemic in European hospitals.

Carbapenem non-susceptible Klebsiella pneumoniae from Micronet network hospitals, Italy, 2009 to 2012.

Carbapenem-resistant Klebsiella pneumoniae has recently been reported as a new, multidrug-resistant nosocomial pathogen in several hospitals from various Italian regions. Through Micronet, a new Italian sentinel laboratory-based surveillance network, we studied the trend of non-susceptibility of K. pneumoniae to selected carbapenems (imipenem and/or meropenem) in 14 of the 15 hospitals participating in the network. Analysis of data from 1 January 2009 to 30 April 2012 revealed a statistically significant increasing trend (p<0.01) in the proportion of carbapenem non-susceptible K. pneumoniae isolates from clinical specimens (from 2.2 % in 2009 to 19.4% in 2012). The increase in the proportion of non-susceptibility was very large for isolates from the respiratory tract (from 5.3% in 2009 to 38.5% in 2012) and blood (from 5.4% in 2009 to 29.2% in 2012). The results demonstrate the urgent need in Italy for infection control, guidelines, antibiotic stewardship programmes and utilisation of surveillance systems, such as Micronet, which are capable of receiving data from hospitals in real time for many pathogens and types of clinical specimens.

[Measles, mumps, rubella and varicella: antibody titration and vaccinations in a large hospital]. / Morbillo, parotite, rosolia e varicella: titolazione anticorpale e vaccinazioni in un ospedale di grandi dimensioni.

The occurrence contagious diseases such as measles, varicella, mumps and rubella in the hospital open creates situations of alarm, due to the potential involvement of workers, but most importantly for the oftentimes harmful consequences for critical patients, such as pregnant women or immunocompromised individuals. In 2007 antibody titration was initiated in our hospital for four infectious diseases, also pursuant to the Lombardy Region Resolution N. VIII/1587 of 22-12-2005 "Decisions regarding vaccinations in children and adults in the Lombardy Region" which indicate the departments in which a priority exists: maternity-neonatal and infectious illnesses. In 2011 a vaccination campaign was launched for unprotected operators in the Health and Medical Management departments: after an interview with the competent physician of reference, the subjects voluntary submitted themselves to vaccination. The protective antibody data encountered over the years are similar to that reported in the literature, with coverage percentages greater than 93% for varicella and rubella, over 89% for measles and over 85% for mumps. Approximately 80% of the operators are protected against all four diseases. However, the dramatic consequences of potential contagion lead us to strongly recommend vaccinations for non-protected subjects. At present 37 operators have been vaccinated with the trivalent MMR vaccine (Measles, Mumps and Rubella) and 14 for Varicella. The antibody response was verified in all cases.

Multiplex real-time PCR and blood culture for identification of bloodstream pathogens in patients with suspected sepsis.

Severe sepsis is increasingly a cause of death. Rapid and correct initial antimicrobial treatment reduces mortality. The aetiological agent(s) cannot always be found in blood cultures (BCs). A novel multiplex PCR test (SeptiFast (alpha version)) that allows identification of 20 bacterial and fungal species directly from blood was used, comparatively with BC, in a multicentre trial of patients with suspected bacterial or fungal sepsis. Five hundred and fifty-eight paired samples from 359 patients were evaluated. The rate of positivity was 17% for BC and 26% for SeptiFast. Ninety-six microorganisms were isolated with BC, and 186 microorganisms were identified with SeptiFast; 231 microorganisms were found by combining the two tests. Of the 96 isolates identified with BC, 22 isolates were considered to be contaminants. Of the remaining 74 non-contaminant BC isolates available for comparison with SeptiFast, 50 were identified as a species identical to the species identified with SeptiFast in the paired sample. Of the remaining 24 BC isolates for which the species, identified in the BC, could not be detected in the paired SeptiFast sample, 18 BC isolates were identified as a species included in the SeptiFast master list, and six BC isolates were identified as a species not included in the SeptiFast master list. With SeptiFast, 186 microorganisms were identified, 12 of which were considered to be contaminants. Of the 174 clinically relevant microorganisms identified with SeptiFast, 50 (29%) were detected by BC. More than half of the remaining microorganisms identified with SeptiFast (but not isolated after BC) were also found in routine cultures of other relevant samples taken from the patients. Future clinical studies should assess whether the use of SeptiFast is of significant advantage in the detection of bloodstream pathogens.

Phaeoacremonium parasiticum subcutaneous infection in a kidney-transplanted patient successfully treated by surgery.

Human infection caused by Phaeoacremonium parasiticum is increasingly being reported. However, only a few case reports show its role as a soil-related contaminant of kidney recipients. We report here a case of a subcutaneous infection by P. parasiticum in a transplanted man. After 4 years, he reported a nonpainful nodule on his forefinger. It was surgically excised. Histological examination revealed dense fibrous connective tissue showing an extensive granulomatous reaction, including the presence of a wooden sliver, and hyaline, branched, and septate hyphae. Six months later, the patient relapsed and underwent large excision. Culture was positive for P. parasiticum. No antifungal drug was administered. Surgical excision was successful.

Pheohyphomycotic soft tissue disease caused by Alternaria alternata in a kidney transplant patient: a case report and literature review.

A 61-year-old Italian man, who underwent a renal transplantation 8 years ago, receiving azathioprine, prednisone, and cyclosporine for immunosuppressive therapy, presented with a large reddish indurated plaque with a central ulcer, which was slowly enlarged, on the right knee. From the diseased tissue biopsy, a dematiaceous fungus matching Alternaria alternata in all essential characters was isolated in pure culture. This is an uncommon fungal complication in a kidney transplant patient. A detailed morphological description of the isolate is provided as well as review of the literature.

Scedosporium apiospermum soft-tissue infection: a case report and review of kidney transplant literature.

Scedosporium apiospermum is an environmental mould. Human infections caused by this organism have been observed; however, only a few case reports show its role as a telluric contaminant to kidney recipients. We have reported here a case of a dramatic soft tissue infection by S. apiospermum in a kidney-transplanted man. Surgical drainage together with voriconazole systemic therapy was successful.

Aetiology and prognosis of bacteraemia in Italy.

A prospective multi-centre study was conducted to assess the microbiological pattern and prognostic factors of bacteraemia and their impact on clinical outcome. All patients admitted to 41 Italian hospitals over 2 months, from whom one or more clinically significant organisms were isolated from blood culture, were studied according to a standardized protocol and case definition. A total of 156 episodes of bacteraemia were identified in 20,601 patients. There were 3.9 episodes of nosocomially acquired bacteraemia and 3.7 episodes of community-acquired bacteraemia per 1000 admissions. The most frequent pathogens isolated were Gram-negative bacteria (44.9%) but Gram-positive species accounted for 40.4 % of episodes. Fungal infections due to Candida spp. were found in 3.8 % of episodes, and multiple pathogens were recovered from 9.6% of episodes. The clinical response to bacteraemia was classified as sepsis in 90 episodes (577%), severe sepsis in 21 (13.5%) and septic shock in 26 (167%); 19 episodes (12.2%) showed no clinical response. The total in-hospital mortality was 25.0%. By multivariate logistic regression, the variables which independently predicted mortality were increasing age, the presence of septic shock, infection with Gram-positive bacteria or fungi and nosocomial acquisition.

Phenotyping of Cryptococcus neoformans strains in Bergamo, Italy (1985-2000).

Cryptococcus neoformans is the cause of the most common life-threatening fungal infection in patients with AIDS. Thirty strains of C. neoformans were collected from inpatients and typied evaluating activity, morphotyping, serotyping, chemosensitivity and adhesivity. Cryptococcus neoformans strains showed different aspectotype profile, the sole presence of serotypes A and D, good susceptibility to azoles and Amphotericin B. Phenotypic epidemiologic markers can be used: characterization of clinical strains excludes a common source.

Urinary detection of Streptococcus pneumoniae antigen for diagnosis of pneumonia.

Streptococcus pneumoniae is one of most common causes of community-acquired pneumonia. We evaluated a newly available rapid immunochromatographic test to detect S. pneumoniae in urine samples verifying its importance in the diagnosis of pneumococcal pneumonia. Our data, obtained from 104 patients with community-acquired pneumonia, show that Now S. pneumoniae Urinary Test is characterized by a sensitivity value of 77.7%, a specifity of 98.8%: positive and negative predictive values are 93.3% and 95.5%, respectively. In conclusion, Now S. pneumoniae Urinary Test should be a useful test to establish the etiology of community-acquired pneumonia.

Proficiency of Italian clinical laboratories in detecting reduced glycopeptide susceptibility in Enterococcus and Staphylococcus spp. using routine laboratory methodologies.

OBJECTIVE: To assess the ability of 59 clinical microbiology laboratories distributed throughout Italy to correctly identify and detect reduced susceptibility to glycopeptides in staphylococci and VanA-, VanB- or VanC-mediated glycopeptide resistance in enterococci. METHODS: Eight test strains comprising three staphylococci (S. aureus ATCC 29212 and two vancomycin-intermediate S. haemolyticus [11105301, 10030683Y]) and five enterococci (E. faecalis ATCC 29212, E. faecalis ATCC 51299 VanB, E. faecium AIB40 VanA, E. faecalis V583 VanB and E. gallinarum AIB39 VanC1) were distributed to 59 Italian clinical microbiology laboratories. Each isolate was blind-coded, and laboratories were instructed to identify the strains and test isolates for susceptibility to teicoplanin and vancomycin using their standard methods. Results were assessed against consensus test results obtained by a reference laboratory. In addition, to complement data interpretation, laboratories were asked to provide retrospective routine test results from their respective hospitals. RESULTS: All 59 laboratories participating in the study completed the susceptibility testing and provided data for analysis. A total of 53 laboratories provided retrospective routine data. Overall, laboratories were able to identify isolates to the genus level successfully. E. gallinarum and S. haemolyticus posed problems for species identification, with only 40.6 and 71.2%, respectively, of results reported correctly; most incorrect results were reported as 'other species'. For enterococcal test strains, VanA phenotypes were detected correctly by 96.6% of laboratories; VanB by 30.5% (E. faecalis ATCC 51299) and 88.1% (E. faecalis V583); and VanC1 by 67.8%. For staphylococcal test strains, 28.8% (S. haemolyticus 11105301) and 23.7% (S. haemolyticus 10030683Y) of the laboratories were able to detect reduced susceptibility to vancomycin. Errors in detecting vancomycin resistance in VanB and VanC1 enterococci were made with all methods, most noticeably by disk diffusion users. For staphylococci, most errors in reporting vancomycin-intermediate resistance occurred with disk diffusion and Vitek (software version 5.04) users. Overall, considerably fewer errors occurred with the detection of teicoplanin resistance, especially for staphylococci. For 1999, routine results show that 41/1749 (2.4%) of E. faecium, 220/11 180 (2.0%) of E. faecalis, 29/24 927 (0.12%) of S. aureus and 54/22 102 (0.24%) of coagulase-negative staphylococci were reported as resistant to vancomycin. CONCLUSION: Italian laboratories are able to identify staphylococci and enterococci adequately, although all methodologies used have problems in identifying E. gallinarum and coagulase-negative staphylococci to the species level. While VanA phenotypes were efficiently detected, problems were experienced in detecting VanB and VanC phenotypes. The majority of laboratories were unable to detect reduced vancomycin susceptibility in staphylococci adequately, especially with disk diffusion and older Vitek systems. Teicoplanin appeared useful as a marker for detecting vancomycin resistance, particularly with disk diffusion. Should enterococcal VanB or staphylococcal glycopeptide-intermediate phenotypes become prevalent in Italy, it is likely that they would be under-detected. New systems under development, such as Vitek2, should improve this situation.

Comparison of MB/Bact alert 3D system with radiometric BACTEC system and Löwenstein-Jensen medium for recovery and identification of mycobacteria from clinical specimens: a multicenter study.

The MB/BacT ALERT 3D System (MB/BacT) (Organon Teknika, Boxtel, The Netherlands) is a fully automated, nonradiometric system with a revised antibiotic supplement kit designed for the recovery of mycobacteria from clinical specimens. In a multicenter study, the recovery rate of acid-fast bacilli (AFB) and the mean time to their detection from clinical specimens was determined by using the MB/BacT system. Data were compared to those assessed by the radiometric BACTEC 460 system (B460) and by culture on Löwenstein-Jensen (L-J) solid medium. A total of 2,859 respiratory and extrapulmonary specimens were processed by the N-acetyl-L-cysteine (NALC)-NaOH method using two different concentrations of sodium hydroxide; 1.5% was adopted in study design A (1,766 specimens), and 1.0% was used in study design B (1,093 specimens). The contamination rates for MB/BacT were 4.6% (study design A) and 7.1% (study design B). One hundred seventy-nine mycobacterial isolates were detected by study design A, with 148 Mycobacterium tuberculosis complex (MTB) isolates and 31 nontuberculous mycobacteria (NTM) isolates. Overall recovery rates were 78.8% for MB/BacT (P = 0.0049), 64.2% for L-J (P < 0.0001), and 87.1% for B460, whereas they were 84.5, 70.9, and 91.2%, respectively, for MTB alone. A total of 125 mycobacteria were detected by study design B, with 46 MTB and 79 NTM. Overall recovery rates by the individual systems were 57.6% (P = 0.0002), 56.8% (P = 0.0001), and 80% for MB/BacT, L-J, and B460, respectively, whereas the rates were 91.3, 78.3, and 97.8% for MTB alone. By study design A, the mean times to detection of smear-positive MTB, smear-negative MTB, and NTM were 11.5, 19.9, and 19.6 days, respectively, with the MB/BacT; 8.3, 16.8, and 16.6 days, respectively, with the B460; and 20.6, 32.1, and 27.8 days, respectively, with L-J medium. By study design B, the mean times were 15.1, 26.7, and 26 days with the MB/BacT; 11.7, 21.3, and 24.8 days with the B460; and 20.4, 28.7, and 28.4 days with L-J medium. Identification was attempted by probing (Accuprobe) MB/BacT-positive bottles within the first working day following instrument positive flag. Results were compared to those obtained in the B460 positive vials by the p-nitro-alpha-acetylamino-beta-hydroxypropiophenone (NAP) test (study design A) or by the Accuprobe assay (study design B). About 90% of MTB and 100% of NTM could be identified, showing turnaround times closely related to those obtained by combining B460 and the NAP test or the Accuprobe assay. In conclusion, even though recovery rates were shown to be lower than B460, especially for NTM, and contaminants were somewhat higher, MB/BacT represents a valuable alternative to the radiometric system, especially in those laboratories where disposal of radioactive waste is restricted. Finally, when AFB are cultured in nonradiometric liquid media, our data (detection times and bacterial overgrowth rates) suggest that decontamination with 1.5% NaOH may be more suitable than the standard NALC-NaOH.

Report of human nocardiosis in Italy between 1993 and 1997.

During a 5-year period, from 1993 to 1997, nocardial infection was diagnosed in 26 patients admitted to hospitals in 11 cities in Italy. Pathogens were identified as Nocardia asteroides in 18 cases, as N. farcinica in five cases, as N. nova in two and as N. brasiliensis in one case. All cases were difficult to diagnose, as usually it happens with this disease: physicians have to be alert to suspect nocardial infection so that appropriate therapy can be early given. This is the second retrospective report on Nocardia spp. infection conducted in Italy, suggesting the utility to organise a permanent network for a national survey system for nocardiosis.

Nosocomial pseudo-outbreak of Fusarium verticillioides associated with sterile plastic containers.

Twenty-six patients were implicated in a nosocomial pseudo-outbreak of Fusarium verticillioides. Examination of clinical records and handling procedures revealed a fungal contamination of supposedly sterile containers used for biological materials. An accurate system of monitoring permitted us to determine the origin of the infection and the means of its spread.

Anti-inflammatory response of IL-4, IL-10 and TGF-beta in patients with systemic inflammatory response syndrome.

The systemic inflammatory response syndrome (SIRS) is an inflammatory process seen in association with a large number of clinical infective and non-infective conditions. The aim of this study was to investigate the role of anti-inflammatory cytokines such as interleukin-4 (IL-4), interleukin-10 (IL-10), and transforming growth factor-beta (TGF-beta). Serum levels of IL-4, IL-10 and TGF-beta were determined in 45 patients with SIRS: 38 patients had SIRS of infectious origin, whereas seven patients had non-infectious SIRS. Twenty healthy subjects were used as controls. Serum levels of IL-4, IL-10 and TGF-beta were determined by an immunoenzyme assay. A significant increase of IL-4 was observed in these patients at the time of diagnosis and 5 days later. In contrast, serum levels of IL-10 were not increased at the time of diagnosis, but a slight decrease was noted after 5 days. Serum levels of TGF-beta were not increased at time of diagnosis, and a slight increase was observed after 5 days. Serum levels of IL-4 were significantly higher in patients with infectious SIRS at the time of diagnosis, whereas no significant difference between infectious and non-infectious SIRS was noted for serum levels of IL-10 and TGF-beta at the time of diagnosis and 5 days later. During SIRS, serum levels of IL-4 were significantly increased with a significant correlation between IL-4 and mortality, and only levels of IL-4 were significantly increased in the SIRS caused by infectious stimuli.

Fungaemia survey: a 10-year experience in Bergamo, Italy.

The authors analysed 10 years of experience of fungaemia at a Regional Italian Hospital, the Azienda Ospedaliera (A.O.) 'Ospedali Riuniti di Bergamo', Bergamo, Italy, from 1988 to 1997. One hundred and sixty-eight cases were observed, with a global incidence corresponding to 3.43/10,000 in-patients. Median age was 38.5 years and mean age was 38.9 years (range: 0-94 years). Female:male ratio was 1:1.75. Fungaemia occurred 25.7 days (mean value) after admission to the hospital. Aetiology was: 134 Candida spp. (70%), 11 Cryptococcus neoformans (6.5%), seven Torulopsis inconspicua (4.1%), three Trichosporon beigelii (1.8%), one Hansenula anomala (0.6%); three Fusarium verticillioides (1.8%), three Geotrichum candidum (1.8%) and one Histoplasma capsulatum (0.6%). Total mortality was 50.6%, and particularly related to Candida kefyr and Candida krusei, to Cr. neoformans and Fusarium spp.