Outbreak of pan-susceptible Klebsiella pneumoniae in a neonatal intensive care unit.

We describe the outbreak of a pan-susceptible Klebsiella pneumoniae strain in a neonatal intensive care unit. A total of 7 neonates developed bacteraemia (37% attack rate), of whom 3 died (43% case fatality rate). A birth weight < 1500 g was the only statistically significant risk factor. Despite an extensive environmental investigation, the source was not identified.

Antibiotic prescription and knowledge about antibiotic costs of physicians in primary health care centers in Greece.

The aim of this questionnaire-based study is to investigate antibiotic prescription practices among primary health care physicians in Greece using the 2007 Hellenic Center for Diseases Control and Prevention guidelines as the gold standard. Seven case scenarios were used. A total of 527 physicians participated. The mean compliance rate with the first recommended antibiotic by the guidelines was 51%, ranging from 22.9% to 71.5% by scenario. Younger physicians and female physicians had higher scores of compliance.

Attitudes toward mandatory occupational vaccinations and vaccination coverage against vaccine-preventable diseases of health care workers in primary health care centers.

BACKGROUND: The aim of this study was to assess the attitudes regarding mandatory occupational vaccinations and the vaccination coverage against vaccine-preventable diseases among health care workers (HCWs) working in primary health care centers in Greece. METHODS: A standardized questionnaire was distributed to HCWs working in all primary health care centers in Greece (n = 185). RESULTS: A total of 2,055 of 5,639 HCWs (36.4% response rate) from 152 primary health care centers participated. The self-reported completed vaccination rates were 23.3% against measles, 23.3% against mumps, 29.8% against rubella, 3% against varicella, 5.8% against hepatitis A, 55.7% against hepatitis B, and 47.3% against tetanus-diphtheria; corresponding susceptibility rates were 17%, 25%, 18.6%, 16.7%, 87.5%, 35%, and 52.6%. Mandatory vaccinations were supported by 65.1% of 1,807 respondents, with wide differences by disease. Multiple logistic regression analysis revealed higher rates of acceptance of mandatory vaccination in physicians compared with other HCW categories. CONCLUSIONS: Despite the fact that two-thirds of HCWs working in primary health care centers in Greece support mandatory vaccination for HCWs, completed vaccination rates against vaccine-preventable diseases are suboptimal.

Post‒cataract surgery endophthalmitis outbreak caused by multidrug-resistant Pseudomonas aeruginosa.

In June 2010, a severe outbreak of 13 cases of post-cataract surgery endophthalmitis caused by multidrug-resistant Pseudomonas aeruginosa occurred. Pulse-field gel electrophoresis in eye isolates found 95% genetic similarity; however, extensive environmental and carriage investigation revealed no source of infection.

Seroepidemiological study of pandemic influenza H1N1 following the 2009-2010 wave in Greece.

Knowledge of seroprevalence rates against 2009 pandemic H1N1 virus will assist vaccination recommendations and the preparation of the health-care system during subsequent years. This study was conducted in Greece during June-August 2010 to estimate the seroprevalence rate against pandemic H1N1 virus. Persons presenting in 29 health-care facilities across the country were studied. Seroprevalence was estimated employing a virus-free ELISA that specifically recognizes 2009 H1N1 virus antibodies in human sera. Sera collected from 2005 to April 2009 were also used to estimate pre-pandemic seroprevalence rates. A total of 954 persons were studied. The overall seroprevalence rate was 28.5% (95% confidence interval=25.6-31.3%). Age-specific rates were 34.2% in persons 0-4 years, 36.3% in persons 5-19 years, 25.0% in persons 20-39 years, 23.4% in persons 40-59 years, and 31.8% in persons ≥ 60 years. The highest rates were recorded in the Regions of Ionian Islands (67%) and Epirus (42.9%), while the lowest (8.4%) in the Region of Thessaly. Age-specific attack rates of infection during 2009-2010 were 28.8% in persons 0-4 years, 32.5% in persons 5-19 years, 14.3% in persons 20-39 years, 19.1% in persons 40-59 years, and 14.4% in persons ≥ 60 years. Multivariate analysis revealed that Region of residence and caring for children <5 years were associated with increased risk for seropositivity. Urbanity, personal and family characteristics, working in a health-care facility or in a school, history of pandemic H1N1 vaccination or history of influenza-like illness during 2009-2010 were not associated with increased risk for seropositivity.

Determinants of intention to get vaccinated against novel (pandemic) influenza A H1N1 among health-care workers in a nationwide survey.

A nationwide survey was conducted in October-November 2009 to investigate determinants of intention to get vaccinated against novel (pandemic) influenza A H1N1 among health-care workers (HCWs) in Greece. Out of 12,879 participating HCWs (response rate: 12.1%) working in 152 (40%) of 380 health-care facilities in Greece, 2814 (21.8%) reported that they intend to get vaccinated against novel influenza A N1H1. Intention rates to get vaccinated increased with age, male sex, being a physician, history of vaccination against seasonal influenza, training in use of personal protective equipment and hand hygiene, and training and involvement in the management of novel influenza cases. Main reasons for refusing vaccination were concerns about vaccine safety (43.1%), inadequate information about the vaccine (27.8%), and perception that they were not at risk for contracting novel influenza (10.7%). Given the low rates of acceptance of pandemic vaccination among HCWs, as found in this study, public health bodies should consider the implementation of a mandatory vaccination policy for HCWs for future pandemics, in order to prevent nosocomial transmission and to protect patients at high-risk for influenza-related complications and death, and to assure the continuity of the essential health-care infrastructure. New strategies should be explored to built safety perception towards influenza vaccines and enhance vaccination rates among HCWs.

Attitudes towards vaccination against seasonal influenza of health-care workers in primary health-care settings in Greece.

Vaccination of health-care workers (HCWs) against seasonal influenza has been consistently recommended worldwide in order to prevent nosocomial transmission and ensure delivery of health-care services during outbreaks. We describe the effects of a nationwide campaign to promote influenza vaccination among HCWs working in primary health-care centers in Greece. During 2008-2009 the mean vaccination rate among HCWs in primary health-care centers was 22.8% (range: 0-100%), with a considerable variability among Health Districts (range: 12.66-54.68%). Logistic regression showed that history of previous influenza vaccination, influenza vaccination the previous season, being a physician and a larger number of employees were associated with increased vaccination rates. Main reason for vaccination was self-protection (75.90%), while main reasons for refusing vaccination were belief that they are not at risk for contracting influenza (44.5%), doubts about vaccine effectiveness (20.79%), and fear of vaccine adverse effects (20.33%).

New nonlinear multivariable model shows the relationship between central corneal thickness and HRTII topographic parameters in glaucoma patients.

PURPOSE: In this paper a new nonlinear multivariable regression method is presented in order to investigate the relationship between the central corneal thickness (CCT) and the Heidelberg Retina Tomograph (HRTII) optic nerve head (ONH) topographic measurements, in patients with established glaucoma. METHODS: Forty nine eyes of 49 patients with glaucoma were included in this study. Inclusion criteria were patients with (a) HRT II ONH imaging of good quality (SD < 30 mum), (b) reliable Humphrey visual field tests (30-2 program), and (c) bilateral CCT measurements with ultrasonic contact pachymetry. Patients were classified as glaucomatous based on visual field and/or ONH damage. The relationship between CCT and topographic parameters was analyzed by using the new nonlinear multivariable regression model. RESULTS: In the entire group, CCT was 549.78 +/- 33.08 mum (range: 484-636 mum); intraocular pressure (IOP) was 16.4 +/- 2.67 mmHg (range: 11-23 mmHg); MD was -3.80 +/- 4.97 dB (range: 4.04 - [-20.4] dB); refraction was -0.78 +/- 2.46 D (range: -6.0 D to +3.0 D). The new nonlinear multivariable regression model we used indicated that CCT was significantly related (R(2) = 0.227, p < 0.01) with rim volume nasally and type of diagnosis. CONCLUSIONS: By using the new nonlinear multivariable regression model, in patients with established glaucoma, our data showed that there is a statistically significant correlation between CCT and HRTII ONH structural measurements, in glaucoma patients.

Evaluation of a rapid antigen detection test in the diagnosis of streptococcal pharyngitis in children and its impact on antibiotic prescription.

OBJECTIVES: To study the performance of the Becton-Dickinson Link 2 Strep A Rapid Test, a rapid antigen detection test (RADT) for diagnosing streptococcal pharyngitis in children presenting to private offices and to the Pediatric Outpatient Clinic of a university hospital, in relation to clinical criteria (fever, tender anterior cervical lymph nodes, tonsillar exudate and absence of cough), and its impact on antibiotic prescription. METHODS: Children were enrolled in Group A (enrolment by private-practice paediatricians; diagnosis by clinical picture only), Group B (enrolment by private-practice paediatricians; diagnosis by RADT and culture) or Group C (enrolment by hospital-affiliated paediatricians in the Pediatric Outpatient Clinic; diagnosis by RADT and culture). RESULTS: During a 2 year period, 820 children were enrolled [369 (45%) in Group A, 270 (33%) in Group B and 181 (22%) in Group C]. Streptococcal pharyngitis was diagnosed by RADT and culture in 146 (32.4%) of the 451 tested children. The sensitivity, specificity and positive and negative predictive values of the RADT were 83.1%, 93.3%, 82.4% and 93.6%, respectively. A stepwise increase in the sensitivity of the RADT was noted among children with one, two, three or four clinical criteria (60.9% to 95.8%). Paediatricians without access to laboratory tests were more likely to prescribe antibiotics compared with paediatricians with access to tests (72.2% versus 28.2%, P < 0.001). Private-practice paediatricians prescribed antibiotics more frequently compared with hospital-affiliated paediatricians (55.7% versus 19.9%, P < 0.001). CONCLUSIONS: Our findings support screening of all children with pharyngitis for Centor criteria and subsequently performing an RADT to guide decision for antibiotic administration. Such a strategy has an important impact on limiting throat culture testing and is associated with reduced antibiotic prescription.

Influenza vaccination acceptance among health-care workers: a nationwide survey.

We conducted a nationwide survey to investigate reasons for influenza vaccine uptake or refusal among health-care workers (HCWs) in Greece. Vaccination rates increased with increasing age, and among HCWs working in Northern Greece, in direct contact with patients, and with influenza vaccination in the past. Self-protection was the main reason for vaccination (89.1%), whereas 55.2% of HCWs reported vaccination to protect patients. Main reasons for refusing vaccination were perception of not being at risk for influenza (43.2%) and fear of vaccine adverse effects (33.4%).

Strategies to increase influenza vaccine uptake among health care workers in Greece.

The aim of the current study was to investigate the contribution of various strategies to increase influenza vaccine uptake among health care workers (HCWs) working in hospitals in Greece during the 2005-2006 season. A total of 132 Greek public hospitals participated in the study. The mean HCWs vaccination rate against influenza during 2005-2006 was 16.36% compared with 1.72% during the previous season. Logistic regression analysis showed that the implementation of the following strategies was significantly associated with influenza vaccination rates above the mean vaccination rate: a mobile vaccination team (OR 2.942, 95% CI 1.154-5.382, p-value 0.016) and lectures on influenza and influenza vaccine (OR 2.386, 95% CI 0.999-5.704, p-value 0.036). In conclusion, in Greece influenza vaccination rates among HCWs remain low; however, the implementation of specific strategies was associated with increased vaccine uptakes.