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PubMed2000

Epidemiology of invasive childhood pneumococcal infections in Greece.

UNLABELLED: A retrospective study was conducted to identify the epidemiologic characteristics of invasive pneumococcal infections among children <14 y of age in our geographic region. During a 5-y period, from 1995 to 1999, 590 cases of invasive pneumococcal infection were identified in Aghia Sophia Children's Hospital, Athens, Greece. The male to female ratio was 1.4:1 and 64% of patients were younger than 5 y of age. The overall annual incidence rate was estimated as 44/100,000 children <14y of age, whereas the incidence rate for children <5y of age was 100/100,000. The most common types of infections were pneumonia (472 cases; 133 definite and 339 probable), bacteraemia without focus (79 cases), and meningitis (33 cases). A seasonal variation of invasive pneumococcal infections was noted, with two peaks--one during spring and the other during autumn. Only two cases with meningitis died and one developed permanent neurological sequelae, representing a case-fatality rate for meningitis of 6%. Serogroups 14, 19, 6, 18, 23, 4 and 9 were the most prevalent, comprising 77% of 92 serotyped isolates. CONCLUSION: Invasive pneumococcal infections cause considerable morbidity in the paediatric population in the Athens metropolitan area. Sixty-six percent of the serotypes causing invasive pneumococcal disease in our region are included in the 7-valent conjugate vaccine.

Adolescent↗
PubMed2005

Prevalence and determinants of exclusive breastfeeding during hospital stay in the area of Athens, Greece.

AIM: To assess breastfeeding practices, focusing on the prevalence and the determinants of exclusive breastfeeding during hospital stay. METHODS: A cross-sectional study of 1603 healthy women, who delivered healthy infants weighing more than 2500 g, was conducted in the area of Athens, Greece. Participants completed a self-administered questionnaire on the day they were discharged from the maternity ward. Classification of breastfeeding and recall period from birth to discharge were in accordance with the WHO criteria. Hierarchical logistic regression analysis was used to study determinants of exclusive breastfeeding initiation. RESULTS: Breastfeeding initiation was reported by 96.1% of the participants. However, exclusive breastfeeding was initiated only in 19.1% and predominant breastfeeding in 7.2% of the cases. The univariate analysis showed that maternal younger age, low educational level, unemployment, vaginal delivery, infant birthweight >3000 g, multiparity, early initiation of breastfeeding, rooming-in and awareness on the existence of breastfeeding centres were associated with higher rates of exclusive breastfeeding. Logistic regression analysis revealed that rooming-in (OR 3.72, p<0.01), demand feeding (OR 2.18, p<0.01), type of delivery (OR 1.61, p<0.01) and the source of information received about breastfeeding are more important determinants of exclusive breastfeeding than the socio-demographic parameters. CONCLUSIONS: Exclusive breastfeeding during hospital stay in the area of Athens is low. Demand feeding and rooming-in positively influence exclusive breastfeeding initiation, while caesarean section and information by mass media have a negative impact.

Adolescent↗
PubMed2005

Vaccination coverage among adolescents in certain provinces of Greece.

AIM: To estimate the vaccination coverage in a sample of adolescents in Greece. METHODS: Vaccination status was estimated in 483 adolescents aged 15-19 y in four prefectures. The criteria for full vaccination were based on the recommendations of the Greek National Vaccination Schedule. RESULTS: The participation rate in the study was 78.7% (380/483 adolescents). The rates of full vaccination were 94.2% for poliomyelitis, 78.4% for hepatitis B, 77.4% for BCG, 65.0% for tetanus and 54.4% for diphtheria. The rates of full vaccination for measles, rubella and mumps were 65.0%, 57.6%, and 56.0%, respectively. For pertussis, the full vaccination rate was only 36.0%, and 7.1% of the study population was totally unvaccinated. The most missed dose for all vaccines was the final booster dose, which is usually administered in older children or adolescents. CONCLUSION: Adolescent vaccination coverage was not satisfactory in this study, mainly due to non-compliance to the final booster dose. Completion of missing vaccines at this age represents the last opportunity for massive intervention and would be of essential value for individual and community protection against common preventable diseases.

Adolescent↗
PubMed1998

Antimicrobial susceptibilities and beta-lactamase production of Shigella isolates in Crete, Greece, during the period 1991-1995.

The susceptibility to 11 antibiotics was determined for 52 strains of Shigella isolated from patients with diarrheal disease in Crete, Greece, during the period 1991-1995. Forty-six percent of the isolates were resistant to ampicillin, 48% to tetracycline, 44.2% to chloramphenicol, and 28.8% to cotrimoxazole. Shigella flexneri was more resistant than S. sonnei to ampicillin (82 vs 4.3%), to tetracycline (82 vs 8.7%) and to cotrimoxazole (42.8 vs 13%). Overall, 82% of all S. flexneri isolates were resistant to the three or four antimicrobial agents tested. The beta-lactamases produced by shigellae were identified by isoelectric focusing and were found to be OXA-1, TEM-1, and a low-level beta-lactamase with a pI>8. The results from the present study, which is the first carried out in Crete, emphasize the need for continuous surveillance of resistance and control of antibiotic usage.

Anti-Bacterial Agents↗
PubMed1990

The frequency of pseudoexfoliation in a region of Greece (Epirus).

A study of pseudoexfoliation syndrome frequency has been evaluated in the northwest of Greece (Epirus). In 700 examined patients (greater than or equal to 50 years old) pseudoexfoliation was found in 170 (24.3%). The frequency of pseudoexfoliation increases with age; no difference was noticed between sexes. Ocular hypertension (greater than 22 mmHg) was found in 39.5% of the patients.

Age Factors↗
PubMedDate not supplied

European practice database: results from Greece.

The survey (EPD) took place during December 2002-January 2003 and presents renal care in Greece. A questionnaire, structured at European level and translated into Greek, was sent to all dialysis centres (114) by post. The questionnaire was returned from 74 centres (64.9%). Some important results were: low use of peritoneal dialysis (13.3%), half of PD patients over 65 years old, one ninth of patients on transplantation waiting list, isolation for HBV positive patients (less for HCV and HIV), high use of AV fistulae (71.2%), maintenance and repair of dialysis machines by company technicians, absence of renal dieticians and social workers (but availability from hospital employees) one nurse every 5.54 patients (3.72 if nurse assistants are included), disinfection between shifts carried out chemically (hot or cold) and puncturing of vascular access performed mainly by nurses and nurse assistants. Data can be used to pressurise government for more scientists in the multidisciplinary team to be hired in hospitals, develop further research topics and to develop continuous education programmes.

Age Factors↗
PubMed1981

Community noise levels in Patras, Greece.

In the city of Patras (Greece), noise measurements were made for the purposes of determining the present noise-pollution levels and the reaction of the people to them. For the latter purpose, a social survey was conducted with the use of a relevant questionnaire which was applied to 500 citizens. Its results show that noise pollution is ranked second in order after air pollution, and that traffic was the principal noise pollutant. The mean noise levels, in 25 monitoring stations throughout the city, were found to be high and definitely unacceptable. For three representative locations, corresponding to high, medium, and low traffic volume, the various statistical noise descriptors, such as Leq, LNP Ldn and others, were used, together with the other measurements, to estimate the noise environment of the entire city. The high degree of annoyance of the people is justified by the high values of Leq, LNP, Ldn, and TNI that were found.

Behavior↗
PubMed2001

Multidrug-resistant strains of Neisseria gonorrhoeae in Greece.

Eighty-seven out of 575 gonococci isolated in Greece from 1991 to 1998 belonged to serovar Bropyst and exhibited resistance to penicillin, tetracycline, erythromycin, and chloramphenicol. Conventional and molecular typing showed three clusters, A, B, and C, that were associated with networks of high- frequency transmitters (cluster A with homosexuals and clusters B and C with refugees from Eastern Europe). Study of one isolate revealed mutations in the penA, mtrR, and porB genes that may explain the multidrug-resistant phenotype.

Anti-Bacterial Agents↗
PubMed1999

Spatial heterogeneity of bacterial populations along an environmental gradient at a shallow submarine hydrothermal vent near Milos Island (Greece).

The spatial heterogeneity of bacterial populations at a shallow-water hydrothermal vent in the Aegean Sea close to the island of Milos (Greece) was examined at two different times by using acridine orange staining for total cell counts, cultivation-based techniques, and denaturing gradient gel electrophoresis (DGGE) analysis of PCR-amplified 16S rRNA gene fragments. Concurrent with measurements of geochemical parameters, samples were taken along a transect from the center of the vent to the surrounding area. Most-probable-number (MPN) counts of metabolically defined subpopulations generally constituted a minor fraction of the total cell counts; both counting procedures revealed the highest cell numbers in a transition zone from the strongly hydrothermally influenced sediments to normal sedimentary conditions. Total cell counts ranged from 3.2 x 10(5) cells ml(-1) in the water overlying the sediments to 6.4 x 10(8) cells g (wet weight) of sediment(-1). MPN counts of chemolithoautotrophic sulfur-oxidizing bacteria varied between undetectable and 1.4 x 10(6) cells g(-1). MPN counts for sulfate-reducing bacteria and dissimilatory iron-reducing bacteria ranged from 8 to 1.4 x 10(5) cells g(-1) and from undetectable to 1.4 x 10(6) cells g(-1), respectively. DGGE revealed a trend from a diverse range of bacterial populations which were present in approximately equal abundance in the transition zone to a community dominated by few populations close to the center of the vent. Temperature was found to be an important parameter in determining this trend. However, at one sampling time this trend was not discernible, possibly due to storm-induced disturbance of the upper sediment layers.

Acridine Orange↗
PubMed1999

Distribution and diversity of sulfur-oxidizing Thiomicrospira spp. at a shallow-water hydrothermal vent in the Aegean Sea (Milos, Greece).

A shallow-water hydrothermal vent system in the Aegean Sea close to the island of Milos (Greece) was chosen to study the diversity and distribution of the chemolithoautotrophic sulfur-oxidizing bacterium Thiomicrospira. Cell numbers in samples from different regions around a solitary vent decreased toward the center of the vent (horizontal distribution), as well as with depth (vertical distribution), corresponding to an increase in temperature (from ca. 25 to 60 degrees C) and a decrease in pH (from ca. pH 7 to 5). Thiomicrospira was one of the most abundant culturable sulfur oxidizers and was even dominant in one region. Phylogenetic analysis of Thiomicrospira spp. present in the highest most-probable-number (MPN) dilutions revealed that most of the obtained sequences grouped in two new closely related clusters within the Thiomicrospira branch. Two different new isolates, i.e., Milos-T1 and Milos-T2, were obtained from high-dilution (10(-5)) enrichments. Phylogenetic analysis indicated that isolate Milos-T1 is related to the recently described Thiomicrospira kuenenii and Hydrogenovibrio marinus, whereas isolate Milos-T2 grouped with the MPN sequences of cluster 2. The predominance of strain Milos-T2 was indicated by its identification in several environmental samples by hybridization analysis of denaturing gradient gel electrophoresis (DGGE) patterns and by sequencing of one of the corresponding bands, i.e., ML-1, from the DGGE gel. The results shown in this paper support earlier indications that Thiomicrospira species are important members of hydrothermal vent communities.

Colony Count, Microbial↗
PubMed2000

Identification of 16S ribosomal DNA-defined bacterial populations at a shallow submarine hydrothermal vent near Milos Island (Greece).

In a recent publication (S. M. Sievert, T. Brinkhoff, G. Muyzer, W. Ziebis, and J. Kuever, Appl. Environ. Microbiol. 65:3834-3842, 1999) we described spatiotemporal changes in the bacterial community structure at a shallow-water hydrothermal vent in the Aegean Sea near the isle of Milos (Greece). Here we describe identification and phylogenetic analysis of the predominant bacterial populations at the vent site and their distribution at the vent site as determined by sequencing of DNA molecules (bands) excised from denaturing gradient gels. A total of 36 bands could be sequenced, and there were representatives of eight major lineages of the domain Bacteria. Cytophaga-Flavobacterium and Acidobacterium were the most frequently retrieved bacterial groups. Less than 33% of the sequences exhibited 90% or more identity with cultivated organisms. The predominance of putative heterotrophic populations in the sequences retrieved is explained by the input of allochthonous organic matter at the vent site.

Bacteria↗
PubMed2005

Detection of Mycobacterium avium subsp. paratuberculosis in retail cheeses from Greece and the Czech Republic.

We investigated the presence of Mycobacterium avium subsp. paratuberculosis in retail cheeses from Greece and the Czech Republic. We found that 31.7% and 3.6% of our samples reacted positive by PCR and culture, respectively. Consumption of these cheeses is likely to result in human exposure to M. avium subsp. paratuberculosis, albeit at a low level for viable cells.

Base Sequence↗
PubMed2006

Use of the GenoType Mycobacterium CM and AS assays to analyze 76 nontuberculous mycobacterial isolates from Greece.

Seventy-six nontuberculous mycobacterial isolates obtained from patients living in Greece were analyzed with the GenoType Mycobacterium CM (for common mycobacteria) and AS (for additional species) assays. GenoType correctly identified all but one of the mycobacterial species. For this species, additional probes should be designed and added to the strip.

Bacterial Typing Techniques↗
PubMed1997

Molecular epidemiology of antibiotic resistance of Salmonella enteritidis during a 7-year period in Greece.

A significant increase in the frequency of isolation of Salmonella enteritidis has been observed during recent years in Greece, parallelled by an increasing rate of resistance of this organism to antibiotics. A substantial proportion of ampicillin- and doxycycline-resistant isolates exhibited cross-resistance to drugs of other classes, such as sulfonamides and streptomycin. Isolates of human origin were overall less resistant than those of animal or food-feed origin. Indeed, strains associated with animal infections were characterized by the highest rates of resistance to several antibiotics. These phenotypic data were correlated with genotypic information concerning two distinct populations: isolates from all sources that were resistant only to ampicillin, the drug toward which resistance rates were highest, and a control group of sensitive isolates. Ampicillin resistance was due to a 34-MDa conjugative plasmid. DNA fingerprinting by macrorestriction of genomic DNA revealed two types, A and B, common to both ampicillin-resistant and -sensitive strains, with 80 to 90% of strains being of type A. However, a third type, C, was specific for the sensitive population, representing 17% of those strains. Therefore, although the majority of resistant isolates were genetically related to sensitive ones, there existed a susceptible clone which had not acquired any resistance traits.

Ampicillin↗
PubMed2000

Characterization of Neisseria gonorrhoeae strains with decreased susceptibility to fluoroquinolones isolated in Greece from 1996 to 1999.

Of the 331 Neisseria gonorrhoeae strains isolated in Greece from 1996 to 1999, 39 (11.8%) exhibited decreased susceptibility to quinolones due to gyrA and parC mutations. Conventional typing and pulsed-field gel electrophoresis showed that 34 of these isolates were clonally related. Epidemiological data indicated that the epidemic clone was sustained in a group of high-frequency transmitters.

Anti-Infective Agents↗
PubMed2001

Isolation of Dobrava virus from Apodemus flavicollis in Greece.

Dobrava virus (DOBV) carried by Apodemus flavicollis is the causative agent of severe hemorrhagic fever with renal syndrome (HFRS). DOBV was isolated from an A. flavicollis mouse trapped in northeastern Greece. This is the third DOBV cell culture isolate in the world, clustering together with other Greek DOBV sequences from HFRS patients and rodents.

Animals↗
PubMed2002

Extended-spectrum beta-lactamase-producing Klebsiella pneumoniae in a neonatal intensive care unit in the high-prevalence area of Athens, Greece.

Extended-spectrum beta-lactamase-producing Klebsiella pneumoniae (EPKP) strains are frequently implicated in outbreaks in neonatal intensive care units (NICUs). During the period from 1997 to 1998, 21 infections and 23 colonizations with EPKP were recorded in the NICU of a children's hospital in Athens, Greece. Seventeen of the infected and 12 of the colonized neonates had been referred from other hospitals. The remaining infections and colonizations occurred during the current hospitalization. Pulsed-field gel electrophoresis typing showed that the latter cases were due to an outbreak strain that persisted in the unit, while the repeated introduction of EPKP carriers was mostly due to clonal outbreaks in two maternity hospitals.

Electrophoresis, Gel, Pulsed-Field↗
PubMed2003

First isolation and identification of Rickettsia conorii from ticks collected in the region of Fokida in Central Greece.

Three different spotted-fever group rickettsiae-Rickettsia conorii, R. massiliae, and R. rhipicephali-were detected and identified by PCR-restriction fragment length polymorphism analysis in Rhipicephalus ticks collected from domestic animals in the Fokida region of Greece, where a high seroprevalence of antibodies to R. conorii was previously demonstrated. The infection rate of ticks was 1.6%. Moreover, R. conorii was isolated from one Rhipicephalus sanguineus tick.

Animals↗