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Gram-negative bacteria in water distribution systems of hospitals 2008 Department of Occupational Biohazards, Institute of Agricultural Medicine, Jaczewskiego 2, 20-090 Lublin, Poland. nina@galen.imw.lublin.pl
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Annals of Agricultural and Environmental Medicine : AAEM
Periodical, Abbrev.
Ann.Agric.Environ.Med.
Pub Date Free Form
Volume
15
Issue
1
Start Page
135
Other Pages
142
Notes
LR: 20160325; JID: 9500166; ppublish
Place of Publication
Poland
ISSN/ISBN
1232-1966; 1232-1966
Accession Number
PMID: 18581992
Language
eng
SubFile
Journal Article; IM
DOI
15135 [pii]
Output Language
Unknown(0)
PMID
18581992
Abstract
A total of 67 samples of tap water were collected from faucets and showerheads in 6 hospitals located in the Lublin province (eastern Poland). The samples were examined for the presence and species composition of Legionella, Gram-negative bacteria belonging to family Enterobacteriaceae (GNB-E) and Gram-negative bacteria not belonging to family Enterobacteriaceae (GNB-NE), by filtering through cellulose filters and culture on respectively GVPC, EMB and tryptic soya agar media. On average, Legionella was isolated from 65.7% of the water samples taken in hospitals. Strains of the Legionella pneumophila types 2-14 predominated, forming 74.6% of total Legionella isolates. Legionella pneumophila type 1 strains constituted 13.5% of the total count, while other species of Legionella (referred to as Legionella spp.) formed 11.9% of the total. The concentrations of Legionella in positive water samples ranged from 3-350 cfu/100 ml. GNB-E were not found in the examined water samples. GNB-NE were isolated from 79.1% of the water samples taken in hospitals in the concentrations 11-300 cfu/100 ml. Species of the family Pseudomonadaceae predominated among GNB-NE strains isolated from the examined water samples, forming on average 71.5% of the total count. Altogether, 20 GNB-NE species were identified in the examined samples, out of which 12 were potentially pathogenic. In conclusion, Gram-negative flora of water samples taken in the examined hospitals complies with potable water sanitary standards by the lack of Enterobacteriaceae species, but creates a moderate health risk because of mediocre concentrations of Legionella and the presence of potentially pathogenic non-enterobacterial species.
Descriptors
Colony Count, Microbial, Enterobacteriaceae/isolation & purification, Filtration/methods/standards, Gram-Negative Bacteria/isolation & purification, Hospitals/standards, Humans, Legionella/isolation & purification, Poland, Risk Assessment, Water Microbiology, Water Supply/analysis/standards
Links
Book Title
Database
Publisher
Data Source
Authors
Stojek,N. M., Szymanska,J., Dutkiewicz,J.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Trajectories of smokeless tobacco use and of cigarette smoking in a cohort of Swedish adolescents: differences and implications 2008 Stockholm Center for Public Health - Tobacco Prevention, Stockholm County Council, Stockholm, Sweden. ingvar.rosendahl.sll.se
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco
Periodical, Abbrev.
Nicotine Tob.Res.
Pub Date Free Form
Jun
Volume
10
Issue
6
Start Page
1021
Other Pages
1027
Notes
LR: 20090217; JID: 9815751; ppublish
Place of Publication
England
ISSN/ISBN
1462-2203; 1462-2203
Accession Number
PMID: 18584465
Language
eng
SubFile
Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1080/14622200802097522 [doi]
Output Language
Unknown(0)
PMID
18584465
Abstract
Developmental trajectories of cigarette smoking have often been described, but there are no such analyses dealing with smokeless tobacco use. A semi-parametric group-based mixture modeling procedure was used to determine the development of smokeless tobacco (snus) use, as well as of cigarette smoking, over time in a cohort of 2,175 Swedish adolescents who were never-users of tobacco at the time of recruitment. An indicator of snus and of cigarette consumption in the previous year was used to model the development of the behavior between 11 and 18 years of age. For snus use three trajectories best described the cohort's experience, while four trajectories provided the best description of cigarette smoking in the cohort. For both tobacco types there were two escalation patterns and one sustained trial trajectory, while an extinction pattern was apparent for cigarette smoking only. Marked sex differences were found, since rapid escalation for snus use was found only among males while high consumption of cigarettes was observed only among females. Dual users (54.9% of all users) showed a trajectory of steeper and more prolonged increase of tobacco consumption than exclusive users of either snus or cigarettes. Several risk factors for tobacco use measured at baseline influenced individual probabilities of belonging to a particular trajectory. The developmental patterns of snus use and cigarette smoking showed high similarity, but they evolved differently in the two sexes. Dual users emerged as a high-risk group for tobacco dependence and tobacco-related harms.
Descriptors
Adolescent, Adolescent Behavior, Confidence Intervals, Cross-Sectional Studies, Female, Health Knowledge, Attitudes, Practice, Humans, Life Style, Male, Odds Ratio, Peer Group, Prevalence, Risk Factors, Risk-Taking, Smoking/epidemiology/psychology, Smoking Cessation/methods, Social Environment, Students/psychology/statistics & numerical data, Sweden/epidemiology, Tobacco Use Disorder/epidemiology/prevention & control, Tobacco, Smokeless
Links
Book Title
Database
Publisher
Data Source
Authors
Rosendahl,K. I., Galanti,M. R., Gilljam,H.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Linking Global Youth Tobacco Survey (GYTS) data to the WHO Framework Convention on Tobacco Control: the case for Indonesia 2008 Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, University of Indonesia. doctjand@indosat.net.id
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Preventive medicine
Periodical, Abbrev.
Prev.Med.
Pub Date Free Form
Sep
Volume
47 Suppl 1
Issue
Start Page
S11
Other Pages
4
Notes
JID: 0322116; 0 (Tobacco Smoke Pollution); 2007/08/02 [received]; 2008/04/19 [revised]; 2008/05/05 [accepted]; 2008/05/10 [aheadofprint]; ppublish
Place of Publication
United States
ISSN/ISBN
1096-0260; 0091-7435
Accession Number
PMID: 18585772
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.; IM
DOI
10.1016/j.ypmed.2008.05.003 [doi]
Output Language
Unknown(0)
PMID
18585772
Abstract
OBJECTIVES: Indonesia has the fifth highest rate of annual cigarette consumption per person of all countries worldwide. The Global Youth Tobacco Survey (GYTS) was developed to provide data on youth tobacco use to countries for their development of youth-based tobacco control programs. Data in this report can be used as baseline measures for future evaluation of the tobacco control program implemented by Indonesia's Ministry of Health. METHODS: The 2006 Indonesia GYTS is a school-based survey that included separate samples for Java and Sumatera, representing more than 84% of the population of Indonesia. Each sample used a two-stage cluster sample design that produced representative samples of students in secondary grades 1-3, which are associated with ages 13-15 years. RESULTS: This report shows that more than 1 in 10 students (12.6%) currently smoked cigarettes, with the prevalence among boys (24.5%) significantly higher than among girls (2.3%). Of the students who currently smoked, more than 7 in 10 (75.9%) reported that they desired to stop smoking now. Regarding secondhand smoke exposure, more than 6 in 10 students (64.2%) reported that they were exposed to smoke from other people in their home during the week before the survey. More than 9 in 10 students (92.9%) had seen a lot of advertisements for cigarettes on billboards during the past month and more than 8 in 10 (82.8%) had seen a lot of advertisements for cigarettes in newspapers or in magazines. CONCLUSIONS: Tobacco control in Indonesia will likely not move forward until the government evaluates and strengthens existing laws, considers passing new strong laws, and develops protocols for enforcing all laws. The Indonesian government also should strongly consider accession to the World Health Organization Framework Convention on Tobacco Control.
Descriptors
Adolescent, Adolescent Behavior/psychology, Environmental Exposure, Female, Humans, Indonesia/epidemiology, Male, Population Surveillance/methods, Prevalence, Sex Factors, Smoking/epidemiology/prevention & control/psychology, Smoking Cessation/psychology/statistics & numerical data, Tobacco Smoke Pollution/prevention & control/statistics & numerical data, World Health Organization
Links
Book Title
Database
Publisher
Data Source
Authors
Aditama,T. Y., Pradono,J., Rahman,K., Warren,C. W., Jones,N. R., Asma,S., Lee,J.
Original/Translated Title
URL
Date of Electronic
20080510
PMCID
Editors
Study on method for benzene and its homologues in indoor air monitored by portable gas chromatography 2008 Institute for Environmental Health and Related Products Safety, Chinese Center for Disease Control and Prevention, Beijing 100021, China.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Wei sheng yan jiu = Journal of hygiene research
Periodical, Abbrev.
Wei Sheng Yan Jiu
Pub Date Free Form
Mar
Volume
37
Issue
2
Start Page
164
Other Pages
167
Notes
LR: 20131121; JID: 9426367; 0 (Benzene Derivatives); 3FPU23BG52 (Toluene); J64922108F (Benzene); L5I45M5G0O (ethylbenzene); ppublish
Place of Publication
China
ISSN/ISBN
1000-8020; 1000-8020
Accession Number
PMID: 18589598
Language
chi
SubFile
English Abstract; Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
Output Language
Unknown(0)
PMID
18589598
Abstract
OBJECTIVE: To set up a method for the low concentration of benzene and its homologues (toluene, ethylbenzene and xylene, BTEX) in indoor air monitored simultaneously by portable gas chromatography (GC). METHODS: The target gas of individual benzene and its homologues was prepared in Tedlar bag by liquid standard solution. The air samples were collected with the on- board sampling pump and preconcentrated on a sorbent tube, then thermally desorbed into capillary column and detected by MAID detector to determine the retention time. Retention time was used to confirm the target compound. The mix calibration gas of benzene and its homologues was prepared by liquid external standard method. Peak area was used to determine the amount of mixture. RESULTS: The benzene and its homologues were separated very well in the selected analysis parameter. The analytical period was less than 15 min. The concentration ranges that could be determined were 0.018-0.879 mg/m3 of benzene, and 0.035-1.299 mg/m3 of toluene, and 0.035-1.300 mg/m3 of ethylbenzene, and 0.035-1.320 mg/m3 of m, p-xylene, and 0.035-1.296 mg/m3 of o-xylene, respectively. The minimum detectable concentration of benzene, toluene, m, p-xylene and o-xylene were 7.5, 11.5, 28.8, 30.3 and 30.6 microg/m3 respectively. The relative deviations between this method and standard method were less than 13.9% and 20.0% in laboratory and in filed study, respectively. In the precision experiment, the relative standard deviations of BTEX were less than 8.4% in different concentrations within one day and one week. CONCLUSION: This method which has high sensitivity and precision, and strong anti-interference ability could be used to detect the low concentration of benzene and its homologues in indoor air.
Descriptors
Air Pollution, Indoor/analysis, Benzene/analysis, Benzene Derivatives/analysis, Chromatography, Gas/methods, Environmental Monitoring/methods, Humans, Sensitivity and Specificity, Toluene/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Xu,C., Xu,D., Dong,X.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Linking Global Youth Tobacco Survey (GYTS) data to the WHO Framework Convention on Tobacco Control (FCTC): the case for Lebanon 2008 Non-Communicable Disease Program World Health Organization, Beirut Office Glass Building 4th Floor, Museum Square Beirut Lebanon. saadeg@leb.emro.who.int
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Preventive medicine
Periodical, Abbrev.
Prev.Med.
Pub Date Free Form
Sep
Volume
47 Suppl 1
Issue
Start Page
S15
Other Pages
9
Notes
JID: 0322116; 0 (Tobacco Smoke Pollution); 2008/02/14 [received]; 2008/05/28 [revised]; 2008/06/04 [accepted]; 2008/06/12 [aheadofprint]; ppublish
Place of Publication
United States
ISSN/ISBN
1096-0260; 0091-7435
Accession Number
PMID: 18590759
Language
eng
SubFile
Journal Article; IM
DOI
10.1016/j.ypmed.2008.06.003 [doi]
Output Language
Unknown(0)
PMID
18590759
Abstract
OBJECTIVES: The purpose of this paper is to use data collected in the 2001 and 2005 Lebanon Global Youth Tobacco Survey (GYTS) to monitor articles in the WHO Framework Convention on Tobacco Control (WHO FCTC). This information is necessary to enhance the capacity of the Ministry of Health and relevant organizations to design, implement, and evaluate tobacco control and prevention programs in Lebanon, especially among adolescents. METHODS: The GYTS is a school-based survey which uses a two-stage sample design to produce representative, independent, cross-sectional estimates. The GYTS was conducted in 2001 and 2005 in Lebanon to produce representative national estimates. Data in this report are limited to students aged 13-15 years. In total, 5035 students from 50 schools participated in 2001; and 3341 students from 50 schools participated in 2005. RESULTS: The data in this report show that, in 2005, 8.6% of the students currently smoked cigarettes, but 33.9% currently smoked narguileh. Half of current smokers wanted to stop smoking and 6 in 10 have tried to stop during the past year but have failed. In 2005, exposure to SHS at home (78.4%) and in public places (74.4%) was very high; while 85.2% thought smoking should be banned in public places. Nearly 9 in 10 students who usually buy their cigarettes in stores were not refused purchase because of their age. Overall, only half of the students in Lebanon reported that during the past school year they had been taught about the dangers of smoking. CONCLUSIONS: Data in this report can be used as baseline measures for future evaluation of the tobacco control programs implemented by the Ministry of Health with particular attention to youth. The key for the Lebanese parliament is to develop, endorse, implement and enforce these new tobacco control laws and use the data from GYTS to monitor progress toward achieving the goals of the WHO FCTC. One key component of tobacco control needs to be the monitoring of Narguileh use among youth, a new emergency.
Descriptors
Adolescent, Adolescent Behavior, Advertising as Topic, Female, Humans, Lebanon/epidemiology, Male, Population Surveillance, Prevalence, Sex Factors, Smoking/epidemiology/prevention & control, Smoking Cessation/psychology/statistics & numerical data, Substance-Related Disorders/epidemiology/prevention & control, Tobacco Smoke Pollution/legislation & jurisprudence/prevention & control/statistics & numerical data
Links
Book Title
Database
Publisher
Data Source
Authors
Saade,G., Warren,C. W., Jones,N. R., Asma,S., Mokdad,A.
Original/Translated Title
URL
Date of Electronic
20080612
PMCID
Editors
Prevalence of patent foramen ovale (PFO) and MRI-lesions in mild neurological decompression sickness (type B-DCS/AGE) 2008 German Naval Medical Institute, Kiel-Kronshagen, Germany.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc
Periodical, Abbrev.
Undersea Hyperb.Med.
Pub Date Free Form
May-Jun
Volume
35
Issue
3
Start Page
197
Other Pages
205
Notes
JID: 9312954; ppublish
Place of Publication
United States
ISSN/ISBN
1066-2936; 1066-2936
Accession Number
PMID: 18619115
Language
eng
SubFile
Journal Article; IM; S
DOI
Output Language
Unknown(0)
PMID
18619115
Abstract
BACKGROUND: Neurological decompression sickness (DCS/AGE) may cover two variants with either severer and probably central nervous (Type A) or milder and sometimes doubtful neurological symptoms (Type B). The pathophysiology of the Type B-DCS/AGE might be different from the Type A-variant. In Type A-DCS/AGE a higher PFO-prevalence (patent foramen ovale) points towards an embolic origin of the Type A-symptomatology. This is not necessarily expected for the Type B-DCS/AGE if the pathophysiology here is micro-embolic or even non-embolic. METHODS: 18 patients with Type B-DCS/AGE were tested against matched controls for presence and size of a PFO with echocardiography and transcranial ultrasound with echo-contrast. Prevalence and number of Type A-brain lesions were visualized by cranial MRI as possible sequelae from gas-embolic events. RESULTS: PFO-prevalence in both groups, the patients with Type B-DCS/AGE (5/18) as well as the controls (7/18) was similar to published PFO-prevalences in normals without any difference between patients and controls (p = 0.725). Also the number of MRI-lesions (ACFs) was the same for Type B-DCS/AGE cases (15 ACFs in 5 patients) and controls (37 ACFs in 8 divers). CONCLUSION: Indirect findings suggesting embolic brain injuries are found with similar frequency in patients with Type B-DCS/AGE and normal controls, which is in contrast to data about Type A-DCS/AGE. This is compatible with different pathophysiological mechanisms involved in the Type A- and Type B-DCS/AGE.
Descriptors
Adult, Brain Diseases/diagnosis/physiopathology, Case-Control Studies, Decompression Sickness/physiopathology, Echocardiography, Embolism, Air/diagnosis/physiopathology, Female, Foramen Ovale, Patent/diagnosis/epidemiology/physiopathology, Humans, Intracranial Embolism/diagnosis/physiopathology, Magnetic Resonance Imaging, Male, Prevalence, Statistics, Nonparametric
Links
Book Title
Database
Publisher
Data Source
Authors
Koch,A. E., Kirsch,H., Reuter,M., Warninghoff,V., Rieckert,H., Deuschl,G.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Underutilization of echocardiography for patent foramen ovale in divers with serious decompression sickness 2008 Center for Hyperbaric Medicine and Environmental Physiology, Department of Anesthesiology, Duke University Medical Center, Durham, NC, USA.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc
Periodical, Abbrev.
Undersea Hyperb.Med.
Pub Date Free Form
May-Jun
Volume
35
Issue
3
Start Page
207
Other Pages
211
Notes
JID: 9312954; ppublish
Place of Publication
United States
ISSN/ISBN
1066-2936; 1066-2936
Accession Number
PMID: 18619116
Language
eng
SubFile
Journal Article; IM; S
DOI
Output Language
Unknown(0)
PMID
18619116
Abstract
The presence of a patent foramen ovale (PFO) in compressed gas diving has been considered a risk factor for serious decompression illness (DCS) for more than 20 years. We conducted a ten year retrospective chart review aimed at determining if physicians treating DCS in a university medical center setting used echocardiography to assess PFO in patients with severe DCS, and if so whether PFO is over-represented in that population. Over the ten-year period, 113 divers underwent recompression therapy for decompression sickness. Of these patients, 48 had serious DCS defined by at least one objective neurological finding. We reviewed medical records for the presence of agitated saline contrast echocardiogram testing and whether or not PFO was present. Only 12 of 48 patients with serious DCS underwent transthoracic agitated saline contrast echocardiogram testing. Of these 12 patients, 6 (50%) had a resting PFO. Binomial proportion testing yielded 95% confidence limits of 21% and 79%. Given 27% PFO prevalence in the general population, PFO may be over-represented in our group of most seriously injured DCS patients yet 75% of patients with objective neurological signs did not undergo echocardiography.
Descriptors
Adult, Aged, Decompression Sickness/ultrasonography, Diving, Echocardiography/utilization, Embolism, Air/ultrasonography, Female, Foramen Ovale, Patent/ultrasonography, Humans, Male, Middle Aged, Retrospective Studies
Links
Book Title
Database
Publisher
Data Source
Authors
Harrah,J. D., O'Boyle,P. S., Piantadosi,C. A.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
The effect of smoke-free homes on smoking behavior in the U.S 2008 Cancer Prevention and Control Program, Moores UCSD Cancer Center, University of California San Diego, La Jolla, California 92093-0901, USA.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
American Journal of Preventive Medicine
Periodical, Abbrev.
Am.J.Prev.Med.
Pub Date Free Form
Sep
Volume
35
Issue
3
Start Page
210
Other Pages
216
Notes
JID: 8704773; 2008/04/10 [received]; 2008/05/16 [revised]; 2008/05/19 [accepted]; 2008/07/11 [aheadofprint]; ppublish
Place of Publication
Netherlands
ISSN/ISBN
0749-3797; 0749-3797
Accession Number
PMID: 18620837
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.amepre.2008.05.023 [doi]
Output Language
Unknown(0)
PMID
18620837
Abstract
BACKGROUND: Evidence from longitudinal population surveys is needed to establish whether smoke-free homes might influence smoking behavior. METHODS: The Tobacco Use Supplement of the nationally representative U.S. Current Population Survey (TUS-CPS) interviewed 3292 adult recent smokers in 2002 and again 12 months later. Both surveys measured smoking status, rules on smoking in the home, and the number of cigarettes smoked per day (cpd). For the main study outcome, an early marker of successful cessation (>or=90 days quit) was used. Analysis was completed in 2008. RESULTS: In the 12 months ending February 2003, the prevalence of smoke-free homes among recent smokers increased from 33% to 39%. A smoke-free home at baseline was associated with >or=90 days cessation at follow-up (10.9% vs 6.2%, AOR=1.44; 95% CI=0.97, 2.21), and those who maintained a smoke-free home were more likely to be >or=90 days quit than those who did not (12.9% vs 5.7%, AOR=1.99; 95% CI=0.93, 4.25). However, adopting a smoke-free home during the year was associated with a nearly fivefold increase in the percentage of >or=90 days quit (AOR=4.81; 95% CI=3.06, 7.59). This increase was seen among all smokers, including moderate-to-heavy smokers (>or=90 days quit: a smoke-free home=13.0% vs no smoke-free home=2.9%, p<0.001). Among continuing smokers with a smoke-free home at baseline, maintenance of te smoke-free home was associated with a decline in consumption (micro=or-2.18; 95 CI=or-1.24; -3.10 cpd). Among continuing smokers with no smoke-free home at baseline, adoption of that status was also associated with a decline in consumption (micro=or-1.72; 95% CI=or-0.58; -2.85 cpd). CONCLUSIONS: This study provides strong evidence that the adoption of a smoke-free home is associated with successful quitting among smokers in the U.S.
Descriptors
Adolescent, Adult, Aged, Confidence Intervals, Female, Health Behavior, Health Promotion, Health Surveys, Humans, Longitudinal Studies, Male, Middle Aged, Prevalence, Risk-Taking, Smoking/epidemiology/prevention & control, Smoking Cessation, Social Marketing, United States/epidemiology, Young Adult
Links
Book Title
Database
Publisher
Data Source
Authors
Messer,K., Mills,A. L., White,M. M., Pierce,J. P.
Original/Translated Title
URL
Date of Electronic
20080711
PMCID
Editors
Cell density and cell aging as factors modulating antifungal resistance of Candida albicans biofilms 2008 Faculty of Dentistry, Oral Biosciences, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong. lakshman@hku.hk
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Antimicrobial Agents and Chemotherapy
Periodical, Abbrev.
Antimicrob.Agents Chemother.
Pub Date Free Form
Sep
Volume
52
Issue
9
Start Page
3259
Other Pages
3266
Notes
LR: 20140903; JID: 0315061; 0 (Antifungal Agents); 0 (Culture Media); 0 (Polystyrenes); OID: NLM: PMC2533466; 2008/07/14 [aheadofprint]; ppublish
Place of Publication
United States
ISSN/ISBN
1098-6596; 0066-4804
Accession Number
PMID: 18625775
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1128/AAC.00541-08 [doi]
Output Language
Unknown(0)
PMID
18625775
Abstract
Biofilm formation is a major virulence attribute of Candida pathogenicity which contributes to higher antifungal resistance. We investigated the roles of cell density and cellular aging on the relative antifungal susceptibility of planktonic, biofilm, and biofilm-derived planktonic modes of Candida. A reference and a wild-type strain of Candida albicans were used to evaluate the MICs of caspofungin (CAS), amphotericin B (AMB), nystatin (NYT), ketoconazole (KTC), and flucytosine (5FC). Standard, NCCLS, and European Committee on Antibiotic Susceptibility Testing methods were used for planktonic MIC determination. Candida biofilms were then developed on polystyrene wells, and MICs were determined with a standard 2,3-bis(2-methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino)carbonyl]-2H-tetrazolium hydroxide assay. Subsequently, antifungal susceptibility testing was performed for greater inoculum concentrations and 24- and 48-h-old cultures of planktonic Candida. Furthermore, Candida biofilm-derived planktonic cells (BDPC) were also subjected to antifungal susceptibility testing. The MICs for both C. albicans strains in the planktonic mode were low, although on increasing the inoculum concentration (up to 1 x 10(8) cells/ml), a variable MIC was noted. On the contrary, for Candida biofilms, the MICs of antifungals were 15- to >1,000-fold higher. Interestingly, the MICs for BDPC were lower and were similar to those for planktonic-mode cells, particularly those of CAS and AMB. Our data indicate that higher antifungal resistance of Candida biofilms is an intrinsic feature possibly related to the biofilm architecture rather than cellular density or cellular aging.
Descriptors
Antifungal Agents/pharmacology, Biofilms/drug effects/growth & development, Candida albicans/drug effects/growth & development/physiology, Cell Adhesion, Colony Count, Microbial, Culture Media, Drug Resistance, Fungal, Humans, Microbial Sensitivity Tests/methods, Polystyrenes, Time Factors
Links
Book Title
Database
Publisher
Data Source
Authors
Seneviratne,C. J., Jin,L. J., Samaranayake,Y. H., Samaranayake,L. P.
Original/Translated Title
URL
Date of Electronic
20080714
PMCID
PMC2533466
Editors
Trends in species distribution and susceptibility of bloodstream isolates of Candida collected in Monterrey, Mexico, to seven antifungal agents: results of a 3-year (2004 to 2007) surveillance study 2008 Departamento de Microbiologia, Facultad de Medicina, Universidad Autonoma de Nuevo Leon, Colonia Mitras Centro, Monterrey, NL, Mexico. gmglez@yahoo.com.mx
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of clinical microbiology
Periodical, Abbrev.
J.Clin.Microbiol.
Pub Date Free Form
Sep
Volume
46
Issue
9
Start Page
2902
Other Pages
2905
Notes
LR: 20141120; JID: 7505564; 0 (Antifungal Agents); 0 (ER 30346); 0 (Echinocandins); 0 (Pyrimidines); 0 (Thiazoles); 0 (Triazoles); 304NUG5GF4 (Itraconazole); 6TK1G07BHZ (posaconazole); 7XU7A7DROE (Amphotericin B); 8VZV102JFY (Fluconazole); F0XDI6ZL63 (cas
Place of Publication
United States
ISSN/ISBN
1098-660X; 0095-1137
Accession Number
PMID: 18632907
Language
eng
SubFile
Journal Article; IM
DOI
10.1128/JCM.00937-08 [doi]
Output Language
Unknown(0)
PMID
18632907
Abstract
During a 3-year surveillance program (2004 to 2007) in Monterrey, Mexico, 398 isolates of Candida spp. were collected from five hospitals. We established the species distribution and in vitro susceptibilities of these isolates. The species included 127 Candida albicans strains, 151 C. parapsilosis strains, 59 C. tropicalis strains, 32 C. glabrata strains, 11 C. krusei strains, 5 C. guilliermondii strains, 4 C. famata strains, 2 C. utilis strains, 2 C. zeylanoides strains, 2 C. rugosa strains, 2 C. lusitaniae strains, and 1 C. boidinii strain. The species distribution differed with the age of the patients. The proportion of candidemias caused by C. parapsilosis was higher among infants 45 years old). MICs were calculated following the criteria of the Clinical Laboratory Standards Institute reference broth macrodilution method. Overall, C. albicans, C. parapsilosis, and C. tropicalis isolates were susceptible to fluconazole and amphotericin B. However, 31.3% of C. glabrata isolates were resistant to fluconazole (MIC >or= 64 microg/ml), 43.3% were resistant to itraconazole (MIC >or= 1 microg/ml), and 12.5% displayed resistance to amphotericin B (MIC >or= 2 microg/ml). Newer triazoles, namely, voriconazole, posaconazole, and ravuconazole, had a notable in vitro activity against all Candida species tested. Also, caspofungin was active against Candida sp. isolates (MIC(90) <or= 0.5 microg/ml) except C. parapsilosis (MIC(90) = 2 microg/ml). It is imperative to promote a national-level surveillance program to monitor this important microorganism.
Descriptors
Adolescent, Adult, Age Factors, Aged, Aged, 80 and over, Amphotericin B/pharmacology/therapeutic use, Antifungal Agents/pharmacology/therapeutic use, Candida/drug effects, Candida albicans/drug effects, Candida glabrata/drug effects, Candida tropicalis/drug effects, Candidiasis/drug therapy/microbiology, Child, Child, Preschool, Echinocandins/pharmacology/therapeutic use, Female, Fluconazole/pharmacology/therapeutic use, Humans, Infant, Infant, Newborn, Itraconazole/pharmacology/therapeutic use, Male, Mexico, Microbial Sensitivity Tests, Middle Aged, Pyrimidines/pharmacology/therapeutic use, Thiazoles/pharmacology/therapeutic use, Triazoles/pharmacology/therapeutic use, Voriconazole, Young Adult
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Authors
Gonzalez,G. M., Elizondo,M., Ayala,J.
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Date of Electronic
20080716
PMCID
PMC2546732
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