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A review of air quality, biological indicators and health effects of second-hand waterpipe smoke exposure 2015 New York University School of Medicine, New York, New York, USA.; New York University School of Medicine, New York, New York, USA.; Departments of Pediatrics and Environmental Medicine, New York University School of Medicine, New York University, New York
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Tobacco control
Periodical, Abbrev.
Tob.Control
Pub Date Free Form
Mar
Volume
24 Suppl 1
Issue
Start Page
i54
Other Pages
i59
Notes
LR: 20151119; CI: Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.; JID: 9209612; 0 (Biomarkers); 0 (Particulate Matter);
Place of Publication
England
ISSN/ISBN
1468-3318; 0964-4563
Accession Number
PMID: 25480544
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; Review; IM
DOI
10.1136/tobaccocontrol-2014-052038 [doi]
Output Language
Unknown(0)
PMID
25480544
Abstract
OBJECTIVE: There has been a rapid increase in the use of waterpipe tobacco and non-tobacco based shisha in many countries. Understanding the impact and effects of second-hand smoke (SHS) from cigarette was a crucial factor in reducing cigarette use, leading to clean indoor air laws and smoking bans. This article reviews what is known about the effects of SHS exposure from waterpipes. DATA SOURCES: We used PubMed and EMBASE to review the literature. Articles were grouped into quantitative measures of air quality and biological markers, health effects, exposure across different settings, different types of shisha and use in different countries. STUDY SELECTION: Criteria for study selection were based on the key words related to SHS: waterpipe, hookah, shisha and third-hand smoke. DATA EXTRACTION: Independent extraction with two reviewers was performed with inclusion criteria applied to articles on SHS and waterpipe/hookah/shisha. We excluded articles related to pregnancy or prenatal exposure to SHS, animal studies, and non-specific source of exposure as well as articles not written in English. DATA SYNTHESIS: A primary literature search yielded 54 articles, of which only 11 were included based on relevance to SHS from a waterpipe/hookah/shisha. CONCLUSIONS: The negative health consequences of second-hand waterpipe exposure have major implications for clean indoor air laws and for occupational safety. There exists an urgent need for public health campaigns about the effects on children and household members from smoking waterpipe at home, and for further development and implementation of regulations to protect the health of the public from this rapidly emerging threat.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Kumar,S.R., Davies,S., Weitzman,M., Sherman,S.
Original/Translated Title
URL
Date of Electronic
20141205
PMCID
PMC4345792
Editors
Effect of low-intensity continuous training on lung function and cardiorespiratory fitness in both cigarette and hookah smokers 2015 Laboratory of Pharmacology, Sfax Medicine Faculty SMF, University of Sfax, Tunisia; Bizerte Sciences Faculty, Department of Biology, University of Carthage. Tunisia; Research Unit (EM2S), Higher Institute of Sport and Physical Education of Sfax, Universit
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
African health sciences
Periodical, Abbrev.
Afr.Health.Sci.
Pub Date Free Form
Dec
Volume
15
Issue
4
Start Page
1170
Other Pages
1181
Notes
LR: 20160311; JID: 101149451; OID: NLM: PMC4765424; OTO: NOTNLM; ppublish
Place of Publication
Uganda
ISSN/ISBN
1729-0503; 1680-6905
Accession Number
PMID: 26958018
Language
eng
SubFile
Journal Article; IM
DOI
10.4314/ahs.v15i4.16 [doi]
Output Language
Unknown(0)
PMID
26958018
Abstract
BACKGROUND: The decline in cardiorespiratory fitness and lung function was higher in smokers. Training method could mitigate some of the negative consequences of smoking among smokers unable or unwilling to quit. OBJECTIVE: To examine the effects of continuous training on lungs functional capability and cardiorespiratory fitness in smokers. METHODS: Fifteen cigarette smokers, 14 hookah smokers, and 14 nonsmokers were assigned to low-intensity continuous training (20-30 minutes of running at 40% of maximum oxygen uptake (O2max)). Lung function and cardiorespiratory fitness parameters were determined using respectively spirometer and treadmill maximal exercise test. RESULTS: Continuous training improved forced expiratory volume in one second (FEV1) and forced expiratory flow at 50% of FVC (FEF50 %) in all participants, smokers and nonsmokers (p
Descriptors
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Database
Publisher
Data Source
Authors
Koubaa,A., Triki,M., Trabelsi,H., Masmoudi,L., Zeghal,K.N., Sahnoun,Z., Hakim,A.
Original/Translated Title
URL
Date of Electronic
PMCID
PMC4765424
Editors
Physicochemical and microbiological characterization of chicha, a rice-based fermented beverage produced by Umutina Brazilian Amerindians 2015 Food Sciences Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil. Electronic address: puerariclaudia@gmail.com.; Biology Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil. Electronic address: karynamagat@gmail.com.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Food Microbiology
Periodical, Abbrev.
Food Microbiol.
Pub Date Free Form
Apr
Volume
46
Issue
Start Page
210
Other Pages
217
Notes
LR: 20151119; CI: Copyright (c) 2014; JID: 8601127; OTO: NOTNLM; 2014/03/25 [received]; 2014/08/08 [revised]; 2014/08/11 [accepted]; 2014/08/27 [aheadofprint]; ppublish
Place of Publication
England
ISSN/ISBN
1095-9998; 0740-0020
Accession Number
PMID: 25475287
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.fm.2014.08.009 [doi]
Output Language
Unknown(0)
PMID
25475287
Abstract
Chicha is a traditional, fermented rice beverage produced by the indigenous Umutina people in Brazil. Culture-dependent and independent approaches were used to investigate the microbial community dynamic. The bacterial population ranged from 0.1 to 6.83 log mL(-1). Lactic acid bacteria (LAB) and Bacillus dominated throughout the fermentation process. Representative colonies were grouped by Repetitive Extragenic Palindromic and Polymerase Chain Reaction (Rep-PCR) and by biochemical features. Genera of Lactobacillus, Bacillus, Leuconostoc, Enterococcus, Streptomyces, Enterobacter, Acinetobacter, Escherichia, Cronobacter, and Klebsiella were identified by partial 16S rRNA gene sequence. As shown by Polimerase and Denaturing Gradient Gel Electrophoresis (PCR-DGGE) analysis, uncultivable Bifidobacterium and Propioniobacterium were found throughout fermentation. Uncultured fungi composed the fungal PCR-DGGE profile. The pH values decreased from 5.2 (time 0) to 3.9 at 36 h of fermentation. Ethanol was not found. The lactic acid concentration increased rapidly throughout fermentation until it reached a high final value (1.4 g L(-1)) and the average glycerol content in the beverage was 0.425 g L(-1). Chicha fermentation might be described by the following phenomena: (i) increasing bacterial population, with lactic acid bacteria (LAB) as the largest group detected; (ii) increasing concentrations of lactic and citric acids; and (iii) the final product is characterized by a high content of acids and the absence of ethanol, therefore characterizing rice chicha an acidic and nonalcoholic beverage. First, this study characterizes the microbial population involved in the nonalcoholic fermentation of chicha, which is produced from rice by Amerindians in Brazil. This study is important for promoting the appreciation of and safeguarding this Brazilian indigenous beverage as an immaterial cultural heritage.
Descriptors
Links
Book Title
Database
Publisher
Elsevier Ltd
Data Source
Authors
Puerari,C., Magalhaes-Guedes,K.T., Schwan,R.F.
Original/Translated Title
URL
Date of Electronic
20140827
PMCID
Editors
Interventions for waterpipe smoking cessation 2015 Department of Epidemiology, Robert Stempel College of Public Health and Social Work, Florida International University, Miami, Florida, USA.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
The Cochrane database of systematic reviews
Periodical, Abbrev.
Cochrane Database Syst.Rev.
Pub Date Free Form
31-Jul
Volume
(7):CD005549. doi
Issue
7
Start Page
CD005549
Other Pages
Notes
LR: 20160731; GR: P50 DA036105/DA/NIDA NIH HHS/United States; GR: R01 DA035160/DA/NIDA NIH HHS/United States; GR: TW05962/TW/FIC NIH HHS/United States; GR: TW07233/TW/FIC NIH HHS/United States; JID: 100909747; 01ZG3TPX31 (Bupropion); 059QF0KO0R (Water); N
Place of Publication
England
ISSN/ISBN
1469-493X; 1361-6137
Accession Number
PMID: 26228266
Language
eng
SubFile
Journal Article; Research Support, N.I.H., Extramural; Review; IM
DOI
10.1002/14651858.CD005549.pub3 [doi]
Output Language
Unknown(0)
PMID
26228266
Abstract
BACKGROUND: Waterpipe tobacco smoking is a traditional method of tobacco use, especially in the Eastern Mediterranean Region (EMR), but its use is now spreading worldwide. Recent epidemiological data, for example, show that waterpipe smoking has become the most prevalent tobacco use method among adolescents in the EMR, and the second most prevalent in the US. Waterpipes are used socially, often being shared between friends or family at home, or in dedicated bars and cafes that provide waterpipes to patrons. Because the smoke passes through a reservoir of water, waterpipe tobacco smoking is perceived as being less harmful than other methods of tobacco use. At least in some cultures, women and girls are more likely to use a waterpipe than to use other forms of tobacco, and it is popular among younger smokers. Accumulating evidence suggests that some waterpipe smokers become addicted, have difficulty quitting, and experience similar health risks as cigarette smokers. OBJECTIVES: To evaluate the effectiveness of tobacco cessation interventions for waterpipe users. SEARCH METHODS: We searched the Cochrane Tobacco Addiction Review Group specialized register in June 2015. We also searched MEDLINE, EMBASE, PsycINFO and CINAHL , using variant terms and spellings ('waterpipe' or 'narghile' or 'arghile' or 'shisha' or 'goza' or 'narkeela' or 'hookah' or 'hubble bubble'). We searched for trials, published or unpublished, in any language, and especially in regions where waterpipe use is widespread. SELECTION CRITERIA: We sought randomized, quasi-randomized or cluster-randomized controlled trials of smoking cessation interventions for waterpipe smokers of any age or gender. The primary outcome of interest was abstinence from tobacco use, measured at six months post-cessation or longer, regardless of whether abstinence was biochemically verified. We included interventions that were pharmacological (for example, nicotine replacement therapy (NRT) or bupropion) or behavioural, or both, and could be directed at individual waterpipe users or at groups of users. We only included tobacco cessation interventions, and did not consider trials of prevention of uptake. DATA COLLECTION AND ANALYSIS: Two review authors assessed abstracts of the studies retrieved by the search strategy, for possible inclusion in the review. We retrieved full-text articles for all abstracts that any of the authors believed might be suitable. Two review authors then extracted data and assessed trial quality independently in accordance with standard Cochrane Collaboration methodologies. We aimed to pool groups of studies that we considered to be sufficiently similar, provided there was no evidence of substantial statistical heterogeneity, and aimed to estimate a pooled risk ratio (RR) using the Mantel-Haenszel fixed-effect method. Where meta-analysis was not possible, we presented summary and descriptive statistics. MAIN RESULTS: Our search retrieved 1311 unique citations, of which 1289 were excluded after title and abstract screening. Of the remaining 22, we excluded 19 because they were empirical studies that were not randomized, quasi-randomized or cluster-randomized controlled trials (n = 12), because they were review articles (n = 3), because they described protocols only (n = 2), they were conducted among cigarette smokers only (n = 1), or they had only a three-month follow-up (n = 1).We identified three controlled trials which tested cessation interventions for waterpipe smokers. Studies were carried out in Egypt (Mohlman 2013), Pakistan (Dogar 2014), and the US (Lipkus 2011). One was a randomized controlled trial and two were cluster-randomized trials. Two studies tested individual-level interventions, and one tested a community-level intervention. Two studies included only behavioural interventions, and one study (Dogar 2014) included two intervention groups: one behavioural, and the other behavioural with bupropion. The Lipkus and Mohlman studies delivered waterpip
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Maziak,W., Jawad,M., Jawad,S., Ward,K.D., Eissenberg,T., Asfar,T.
Original/Translated Title
URL
Date of Electronic
20150731
PMCID
PMC4838024
Editors
Hookah-Related Twitter Chatter: A Content Analysis 2015 Department of Psychiatry, Washington University School of Medicine, 660 South Euclid Ave, Box 8134, St. Louis, MO 63110. Email: kraussm@psychiatry.wustl.edu.; Department of Psychiatry, Washington University School of Medicine, St. Louis.; Seattle Children
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Preventing chronic disease
Periodical, Abbrev.
Prev.Chronic Dis.
Pub Date Free Form
30-Jul
Volume
12
Issue
Start Page
E121
Other Pages
Notes
LR: 20151202; GR: K02 DA021237/DA/NIDA NIH HHS/United States; GR: R01 DA031288/DA/NIDA NIH HHS/United States; GR: R01 DA032843/DA/NIDA NIH HHS/United States; GR: R01 DA039455/DA/NIDA NIH HHS/United States; JID: 101205018; OID: NLM: PMC4523113; epublish
Place of Publication
United States
ISSN/ISBN
1545-1151
Accession Number
PMID: 26226068
Language
eng
SubFile
Journal Article; Research Support, N.I.H., Extramural; IM
DOI
10.5888/pcd12.150140 [doi]
Output Language
Unknown(0)
PMID
26226068
Abstract
INTRODUCTION: Hookah smoking is becoming increasingly popular among young adults and is often perceived as less harmful than cigarette use. Prior studies show that it is common for youth and young adults to network about substance use behaviors on social media. Social media messages about hookah could influence its use among young people. We explored normalization or discouragement of hookah smoking, and other common messages about hookah on Twitter. METHODS: From the full stream of tweets posted on Twitter from April 12, 2014, to May 10, 2014 (approximately 14.5 billion tweets), all tweets containing the terms hookah, hooka, shisha, or sheesha were collected (n = 358,523). The hookah tweets from Twitter users (tweeters) with high influence and followers were identified (n = 39,824) and a random sample of 5,000 tweets was taken (13% of tweets with high influence and followers). The sample of tweets was qualitatively coded for normalization (ie, makes hookah smoking seem common and normal or portrays positive experiences with smoking hookah) or discouragement of hookah smoking, and other common themes using crowdsourcing. RESULTS: Approximately 87% of the sample of tweets normalized hookah use, and 7% were against hookah or discouraged its use. Nearly half (46%) of tweets that normalized hookah indicated that the tweeter was smoking hookah or wanted to smoke hookah, and 19% were advertisements/promotions for hookah bars or products. CONCLUSION: Educational campaigns about health harms from hookah use and policy changes regarding smoke-free air laws and tobacco advertising on the Internet may be useful to help offset the influence of pro-hookah messages seen on social media.
Descriptors
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Book Title
Database
Publisher
Data Source
Authors
Krauss,M.J., Sowles,S.J., Moreno,M., Zewdie,K., Grucza,R.A., Bierut,L.J., Cavazos-Rehg,P.A.
Original/Translated Title
URL
Date of Electronic
20150730
PMCID
PMC4523113
Editors
Epidemiology of Oral Cancer in Iran: a Systematic Review 2015 Hematology and Oncology Ward, Urmia University of Medical Sciences, Urmia, Iran E-mail : saberazami@yahoo.com, Dr.naghavii@gmail.com.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Asian Pacific journal of cancer prevention : APJCP
Periodical, Abbrev.
Asian Pac.J.Cancer.Prev.
Pub Date Free Form
Volume
16
Issue
13
Start Page
5427
Other Pages
5432
Notes
JID: 101130625; ppublish
Place of Publication
Thailand
ISSN/ISBN
1513-7368; 1513-7368
Accession Number
PMID: 26225689
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; Review; IM
DOI
Output Language
Unknown(0)
PMID
26225689
Abstract
BACKGROUND: Oral cancer stands among the 10 top causes of cancer death in the world. Considering the role of epidemiologic information on planning and effective interventions, the present study aimed to investigate the epidemiology of oral cancer in Iran. MATERIALS AND METHODS: The required information for this systematic review study was obtained from PubMed, Google Scholar, CINAHL,SID, Medlib, Magiran and Iranmedex databases, using key words "cancer", "oral cancer", "squamous cell carcinoma", "oral cavity carcinoma" and their Persian equivalents in combination with keywords of epidemiology, prevalence, etiology, frequency, and Iran from 1990 to 2014. From 1,065 related studies found, finally 25 were included to the study. RESULTS: The mean age of 8,248 patients in 25 studies was 54.0+/-15.1 years. The male/female ratio for oral cancer was 1.91. Tongue with average percentage of 29.9 was the most involved site. Regarding microscopic grade, 65.7% of cases were grade 1. SCCs, accounting for an average of 70.0%, was the most common among all types of oral cancer. In the majority of studies, smoking including cigarette, hookah, and tobacco consumption was found to be a risk factor. CONCLUSIONS: The epidemiological pattern of oral cancer in Iran is somewhat similar to that of other countries. Yet the information on hand in this field is limited and considering the role of epidemiological data we suggest conducting more accurate studies to catch data that is required for effective programs and interventions.
Descriptors
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Database
Publisher
Data Source
Authors
Maleki,D., Ghojazadeh,M., Mahmoudi,S.S., Mahmoudi,S.M., Pournaghi-Azar,F., Torab,A., Piri,R., Azami-Aghdash,S., Naghavi-Behzad,M.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Waterpipe tobacco smoking: what is the evidence that it supports nicotine/tobacco dependence? 2015 Center for Clinical and Translational Research and Center for the Study of Tobacco Products, Virginia Commonwealth University, Richmond, Virginia, USA.; Department of Psychology, Center for the Study of Tobacco Products, Virginia Commonwealth University,
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Tobacco control
Periodical, Abbrev.
Tob.Control
Pub Date Free Form
Mar
Volume
24 Suppl 1
Issue
Start Page
i44
Other Pages
i53
Notes
LR: 20150618; CI: Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.; GR: P50 DA036105/DA/NIDA NIH HHS/United States; GR: P
Place of Publication
England
ISSN/ISBN
1468-3318; 0964-4563
Accession Number
PMID: 25492935
Language
eng
SubFile
Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Review; IM
DOI
10.1136/tobaccocontrol-2014-051910 [doi]
Output Language
Unknown(0)
PMID
25492935
Abstract
OBJECTIVE: Waterpipe tobacco smoking (WTS) involves passing tobacco smoke through water prior to inhalation, and has spread worldwide. This spread becomes a public health concern if it is associated with tobacco-caused disease and if WTS supports tobacco/nicotine dependence. A growing literature demonstrates that WTS is associated with disability, disease and death. This narrative review examines if WTS supports nicotine/tobacco dependence, and is intended to help guide tobacco control efforts worldwide. DATA SOURCES: PUBMED search using: (("waterpipe" or "narghile" or "arghile" or "shisha" or "goza" or "narkeela" or "hookah" or "hubble bubble")) AND ("dependence" or "addiction"). STUDY SELECTION: Excluded were articles not in English, without original data, and that were not topic-related. Thirty-two articles were included with others identified by inspecting reference lists and other sources. DATA SYNTHESIS: WTS and the delivery of the dependence-producing drug nicotine were examined, and then the extent to which the articles addressed WTS-induced nicotine/dependence explicitly, as well as implicitly with reference to criteria for dependence outlined by the WHO. CONCLUSIONS: WTS supports nicotine/tobacco dependence because it is associated with nicotine delivery, and because some smokers experience withdrawal when they abstain from waterpipe, alter their behaviour in order to access a waterpipe and have difficulty quitting, even when motivated to do so. There is a strong need to support research investigating measurement of WTS-induced tobacco dependence, to inform the public of the risks of WTS, which include dependence, disability, disease and death, and to include WTS in the same public health policies that address tobacco cigarettes.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Aboaziza,E., Eissenberg,T.
Original/Translated Title
URL
Date of Electronic
20141209
PMCID
PMC4345797
Editors
Prevalence and predictors of habitual snoring in a sample of Saudi middle-aged adults 2015 Sleep Medicine and Research Center, King Abdulaziz University Hospital, Jeddah, Kingdom of Saudi Arabia. E-mail. sowali@kau.edu.sa.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Saudi medical journal
Periodical, Abbrev.
Saudi Med.J.
Pub Date Free Form
Aug
Volume
36
Issue
8
Start Page
920
Other Pages
927
Notes
LR: 20150902; JID: 7909441; OID: NLM: PMC4549587; ppublish
Place of Publication
Saudi Arabia
ISSN/ISBN
0379-5284; 0379-5284
Accession Number
PMID: 26219441
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.15537/smj.2015.8.11848 [doi]
Output Language
Unknown(0)
PMID
26219441
Abstract
OBJECTIVES: To determine the prevalence of habitual snoring among a sample of middle-aged Saudi adults, and its potential predictors. METHODS: A cross-sectional study was conducted from March 2013 until June 2013 in randomly selected Saudi Schools in Jeddah, Kingdom of Saudi Arabia. The enrolled subjects were 2682 school employees (aged 30-60 years, 52.1% females) who were randomly selected and interviewed. The questionnaire used for the interview included: the Wisconsin Sleep Questionnaire to assess for snoring, medical history, and socio-demographic data. Anthropometric measurements and blood pressure readings were recorded using standard methods. RESULTS: Forty percent of the 2682 enrolled subjects were snorers: 23.5% were habitual snorers, 16.6% were moderate snorers, and 59.9%, were non-snorers. A multivariate analysis revealed that independent predictors of snoring were ageing, male gender, daytime sleepiness, hypertension, family history of both snoring and obstructive sleep apnea, water-pipe smoking, and consanguinity. CONCLUSION: This study shows that snoring is a common condition among the Saudi population. Previously reported risk factors were reemphasized but consanguinity was identified as a new independent predictive risk factor of snoring. Exploring snoring history should be part of the clinical evaluation.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Wali,S.O., Abaalkhail,B.A.
Original/Translated Title
URL
Date of Electronic
PMCID
PMC4549587
Editors
Probabilistic models to describe the dynamics of migrating microbial communities 2015 Infrastructure and Environment Research Division, School of Engineering, University of Glasgow, Glasgow, United Kingdom; The Marine Biological Association of the UK, Plymouth, UK.; Infrastructure and Environment Research Division, School of Engineering, U
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
PloS one
Periodical, Abbrev.
PLoS One
Pub Date Free Form
24-Mar
Volume
10
Issue
3
Start Page
e0117221
Other Pages
Notes
LR: 20150405; JID: 101285081; OID: NLM: PMC4372544; 2015 [ecollection]; 2014/07/18 [received]; 2014/12/21 [accepted]; 2015/03/24 [epublish]; epublish
Place of Publication
United States
ISSN/ISBN
1932-6203; 1932-6203
Accession Number
PMID: 25803866
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; IM
DOI
10.1371/journal.pone.0117221 [doi]
Output Language
Unknown(0)
PMID
25803866
Abstract
In all but the most sterile environments bacteria will reside in fluid being transported through conduits and some of these will attach and grow as biofilms on the conduit walls. The concentration and diversity of bacteria in the fluid at the point of delivery will be a mix of those when it entered the conduit and those that have become entrained into the flow due to seeding from biofilms. Examples include fluids through conduits such as drinking water pipe networks, endotracheal tubes, catheters and ventilation systems. Here we present two probabilistic models to describe changes in the composition of bulk fluid microbial communities as they are transported through a conduit whilst exposed to biofilm communities. The first (discrete) model simulates absolute numbers of individual cells, whereas the other (continuous) model simulates the relative abundance of taxa in the bulk fluid. The discrete model is founded on a birth-death process whereby the community changes one individual at a time and the numbers of cells in the system can vary. The continuous model is a stochastic differential equation derived from the discrete model and can also accommodate changes in the carrying capacity of the bulk fluid. These models provide a novel Lagrangian framework to investigate and predict the dynamics of migrating microbial communities. In this paper we compare the two models, discuss their merits, possible applications and present simulation results in the context of drinking water distribution systems. Our results provide novel insight into the effects of stochastic dynamics on the composition of non-stationary microbial communities that are exposed to biofilms and provides a new avenue for modelling microbial dynamics in systems where fluids are being transported.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Schroeder,J.L., Lunn,M., Pinto,A.J., Raskin,L., Sloan,W.T.
Original/Translated Title
URL
Date of Electronic
20150324
PMCID
PMC4372544
Editors
Prospective Predictors of Novel Tobacco and Nicotine Product Use in Emerging Adulthood 2015 Oregon Research Institute, Eugene, Oregon. Electronic address: sarah@ori.org.; Oregon Research Institute, Eugene, Oregon.; Oregon Research Institute, Eugene, Oregon.; Oregon Research Institute, Eugene, Oregon.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
The Journal of adolescent health : official publication of the Society for Adolescent Medicine
Periodical, Abbrev.
J.Adolesc.Health
Pub Date Free Form
Aug
Volume
57
Issue
2
Start Page
186
Other Pages
191
Notes
LR: 20160801; CI: Copyright (c) 2015; GR: DA010767-14S2/DA/NIDA NIH HHS/United States; GR: R01 DA010767/DA/NIDA NIH HHS/United States; GR: R01DA10767/DA/NIDA NIH HHS/United States; JID: 9102136; 6M3C89ZY6R (Nicotine); NIHMS685766; OID: NLM: NIHMS685766; O
Place of Publication
United States
ISSN/ISBN
1879-1972; 1054-139X
Accession Number
PMID: 26206439
Language
eng
SubFile
Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S.; IM
DOI
10.1016/j.jadohealth.2015.04.015 [doi]
Output Language
Unknown(0)
PMID
26206439
Abstract
PURPOSE: The purpose of this study was to investigate whether risk factors for cigarette smoking assessed in adolescence predict the use of novel tobacco and nicotine products (hookah, little cigars, and e-cigarettes) in early emerging adulthood. METHODS: In a longitudinal study (N = 862), risk factors were measured in middle and high school, and novel product use was measured in emerging adulthood (mean age 22.4 years). Structural equation modeling was used to test a model predicting lifetime use of any of hookah, little cigars, and e-cigarettes in early emerging adulthood from distal predictors (gender, maternal smoking through Grade 8; already tried alcohol, cigarettes, or marijuana by Grade 8; and sensation seeking at Grade 8) and potential mediators (intentions to smoke cigarettes, drink alcohol or smoke marijuana at Grade 9, and smoking trajectory across high school). RESULTS: The most prevalent novel tobacco product was hookah (21.7%), followed by little cigars (16.8%) and e-cigarettes (6.6%). Maternal smoking, having already tried substances, and sensation seeking each predicted the use of at least one of these products via an indirect path through intentions to use substances and membership in a high-school smoking trajectory. CONCLUSIONS: Risk factors for cigarette smoking were found to predict novel tobacco use, suggesting that interventions to prevent cigarette smoking could be extended to include common novel tobacco products.
Descriptors
Links
Book Title
Database
Publisher
Society for Adolescent Health and Medicine. Published by Elsevier Inc
Data Source
Authors
Hampson,S.E., Andrews,J.A., Severson,H.H., Barckley,M.
Original/Translated Title
URL
Date of Electronic
PMCID
PMC4514910
Editors