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1.
Indoor Air ; 30(2): 361-369, 2020 03.
Article in English | MEDLINE | ID: mdl-31724228

ABSTRACT

Lavash is a traditional flatbread commonly baked at home by women in Armenia and other Middle Eastern and Caucasus countries. The baking process follows centuries' old recipes and is done primarily in open fire ovens. Data are limited regarding the impact of baking on indoor air quality and health outcomes. This study aimed at assessing the effects of lavash baking on household air pollution and cardiovascular outcomes among women who bake lavash in rural Armenia. A convenience sample of 98 bakers, all women, never-smokers, representing 36 households were enrolled. Carbon monoxide (CO) concentrations and carboxyhemoglobin (COHb) levels were monitored before, during, and/or after baking. As expected, exposure to concentrations of CO peaking at/or above 35-ppm during baking was more likely to occur in homes with fully enclosed and poorly ventilated baking rooms, compared to those with three or fewer walls and/or one or more windows. Bakers in homes where CO concentrations peaked at/or above 35-ppm were more likely to have an increase in post-baking COHb levels compared to those in homes with lower CO concentrations.


Subject(s)
Air Pollution, Indoor/statistics & numerical data , Carbon Monoxide/analysis , Carboxyhemoglobin/metabolism , Environmental Exposure/statistics & numerical data , Armenia , Bread , Cooking/methods , Cooking/statistics & numerical data , Female , Humans , Rural Population
2.
Toxicology ; 394: 93-101, 2018 02 01.
Article in English | MEDLINE | ID: mdl-29233657

ABSTRACT

Polychlorinated biphenyls (PCB) exposure at low chronic levels is a significant public health concern. Animal and epidemiological studies indicate that low PCB body burden may cause neurotoxicity and be a risk factor for neurodegenerative diseases. In the current study, we measured the ability of two non-dioxin like PCBs, 2,2',4,4',5,5'-hexachlorobiphenyl (PCB153) and 2,2'3,5',6-pentachlorobiphenyl (PCB95), to alter dopamine (DA) levels and metabolism using the dopaminergic PC12 cell line. Our hypothesis is that treatment of PC12 cells with non-toxic concentrations of PCB153 or PCB95 for 12 and 24 h will have different effects due to different congener structures. Levels of DA and of 3,4-dihydroxyphenylacetaldehyde (DOPAL), 3, 4-dihyroxylphenylethanol (DOPET), and 3,4-dihyroxylphenylacetic acid (DOPAC) metabolite, gene expression of the dopamine synthesis enzyme tyrosine hydroxylase (TH) and the vesicular monoamine transporter (VMAT2), and gene expression of the anti-oxidant enzymes Cu/Zn and Mn superoxide oxidase (Cu/ZnSOD, MnSOD), glutathione peroxidase (GPx) and catalase were determined. PCB153 decreased intracellular and extracellular levels of DA after 12 h exposure and this was consistent with an increase in DA metabolites. After 24 h, the level of DA in medium increased compared to the control. In contrast, PCB95 exposure increased the intracellular DA level and decreased DA in medium consistent with a down-regulation of VMAT2 expression at 12 h. After 24 h exposure, PCB95 increased DA levels in media. Expression of TH mRNA increased slightly following 12 h but not at 24 h exposure. MnSOD mRNA increased up to 6-7 fold and Cu/ZnSOD increased less than two-fold after treatment with both congeners. Catalase expression was up-regulated following 24 h exposure to PCB153 and PCB95, but GPx expression was down-regulated after 12 h exposure to PCB95 only. These results suggest that PCB153 and PCB95 are neurotoxic and affect DA turnover with structure-dependent differences between these two congeners.


Subject(s)
Dopamine/metabolism , Neurotoxicity Syndromes/etiology , Neurotoxicity Syndromes/metabolism , Polychlorinated Biphenyls/toxicity , 3,4-Dihydroxyphenylacetic Acid/analogs & derivatives , 3,4-Dihydroxyphenylacetic Acid/metabolism , Animals , Male , PC12 Cells , Rats
3.
Article in English | MEDLINE | ID: mdl-28758942

ABSTRACT

Burn-related injuries are a significant burden in children, particularly in low- and middle-income countries (LMICs), where more than 90% of burn-related pediatric deaths occur. Lack of adult supervision of children is a major risk for pediatric burn injuries. The goal of this paper was to examine the general characteristics of burns and identify burn injury outcomes among adult-supervised children compared to those who were not supervised. The study examined burn injury and clinical characteristics among all burn patients admitted to two trauma hospitals in The Gambia, West Africa. At intake in the emergency room, the treating physician or nurse determined the need for admission based on body surface area burned (BSAB), depth of burn, and other clinical considerations such as co-occurring injuries and co-morbidities. During the study period of 1 April 2014 through 31 October 2016, 105 burn patients were admitted and data were collected by the treating physician for all of them. Information about supervision was only asked for children aged five years or less. More than half (51%) of the burn patients were children under 18 years, and 22% were under 5 years. Among children under five, most (86.4%) were supervised by an adult at the time of burn event. Of the 19 supervised children, 16 (84.2%) had body area surface burned (BSAB) of less than 20%. Two of the three children without adult supervision at the time of burn event had BSAB ≥ 20%. Overall, 59% of the patients had 20% + BSAB. Females (aOR = 1.25; 95% CI = 0.43-3.62), those burned in rural towns and villages (aOR = 2.29; 95% CI = 0.69-7.57), or burned by fire or flames (aOR = 1.47; 95% CI = 0.51-4.23) had increased odds of having a BSAB ≥ 20%, although these differences were not statistically significant. Children 0-5 years or 5-18 years (aOR = 0.04, 95% CI = 0.01-0.17; aOR = 0.07, 95% CI = 0.02-0.23, respectively) were less likely to have BSAB ≥ 20% than adults. Those burned in a rural location (aOR = 9.23, 95% CI = 2.30-37.12) or by fire or flames (aOR = 6.09, 95% CI = 1.55-23.97) were more likely to die. Children 0-5 years or 5-18 years (aOR = 0.2, 95% CI = 0.03-1.18; aOR = 0.38; 95% CI = 0.11-1.570, respectively) were less likely to die. Children constitute a significant proportion of admitted burn patients, and most of them were supervised at the time of the burn event. Supervised children (compared to unsupervised children) had less severe burns. Programs that focus on burn prevention at all levels including child supervision could increase awareness and reduce burns or their severity. Programs need to be designed and evaluated with focus on the child development stage and the leading causes of burns by age group.


Subject(s)
Burns/epidemiology , Child, Hospitalized/statistics & numerical data , Adolescent , Caregivers , Child , Child, Preschool , Female , Fires , Gambia/epidemiology , Hospitalization , Humans , Infant , Infant, Newborn , Male , Trauma Centers/statistics & numerical data
4.
J Environ Public Health ; 2017: 8612953, 2017.
Article in English | MEDLINE | ID: mdl-28512475

ABSTRACT

We identified risk factors for road traffic injuries among road users who received treatment at two major trauma hospitals in urban Gambia. The study includes pedestrians, bicyclists, motorcyclists, and drivers/passengers of cars and trucks. We examined distributions of injury by age, gender, collision vehicle types and vehicle category, and driver and environment factors. Two hundred and fifty-four patients were included in the study. Two-thirds were male and one-third female. Two-thirds (67%) of road traffic injuries involved pedestrians, bicyclists, and motorcyclists; and these were more common during weekdays (74%) than weekends. Nearly half (47%) of road traffic injuries involved pedestrians. One-third (34%) of injured patients were students (mean age of students was less than 14 years), more than half (51%) of whom were injured on the roadway as pedestrians. Head/skull injuries were common. Concussion/brain injuries were 3.5 times higher among pedestrians, bicyclists, and motorcyclists than vehicle occupants. Crashes involving pedestrians were more likely to involve young people (<25 years; aOR 6.36, 95% CI: 3.32-12.17) and involve being struck by a motor car (aOR 3.95, 95% CI: 2.09-7.47). Pedestrians contribute the largest proportion of hospitalizations in the Gambia. Young pedestrians are at particularly high risk. Prevention efforts should focus on not only vehicle and driver factors, but also protecting pedestrians, bicyclists, and motorcyclists.


Subject(s)
Accidents, Traffic/classification , Accidents, Traffic/statistics & numerical data , Wounds and Injuries/epidemiology , Adolescent , Adult , Female , Gambia/epidemiology , Hospitalization/statistics & numerical data , Humans , Male , Risk Factors , Wounds and Injuries/etiology , Young Adult
5.
Int J Occup Environ Health ; 23(3): 187-192, 2017 07.
Article in English | MEDLINE | ID: mdl-29528276

ABSTRACT

Background Herbal formulations, traditional medicine, and complementary and alternative medicine are used by the majority of the world's population. Toxicity associated with use of Ayurvedic products due to metal content is an increasingly recognized potential public health problem. Objectives Report on toxic metals content of Ayurvedic products obtained during an investigation of lead poisoning among users of Ayurvedic medicine. Methods Samples of Ayurvedic formulations were analyzed for metals and metalloids following established US. Environmental Protection Agency methods. Results Lead was found in 65% of 252 Ayurvedic medicine samples with mercury and arsenic found in 38 and 32% of samples, respectively. Almost half of samples containing mercury, 36% of samples containing lead and 39% of samples containing arsenic had concentrations of those metals per pill that exceeded, up to several thousand times, the recommended daily intake values for pharmaceutical impurities. Conclusions Lack of regulations regarding manufacturing and content or purity of Ayurvedic and other herbal formulations poses a significant global public health problem.


Subject(s)
Environmental Pollutants/analysis , Medicine, Ayurvedic , Metalloids/analysis , Metals/analysis , Plant Preparations/chemistry , Arsenic/analysis , Iowa , Lead/analysis , Lead Poisoning , Mercury/analysis , Public Health
6.
Int J Public Health ; 62(2): 317-325, 2017 Mar.
Article in English | MEDLINE | ID: mdl-27592360

ABSTRACT

OBJECTIVES: Data are lacking on environmental and occupational health risks and resources available for the prevention of related diseases in the West African subregion. METHODS: A needs assessment survey was conducted to identify environmental and occupational health concerns, and needs and strategies for skills training in the region. The survey was followed by a consensus-building workshop to discuss research and training priorities with representatives from countries participating in the study. RESULTS: Two hundred and two respondents from 12 countries participated in the survey. Vector-borne diseases, solid waste, deforestation, surface and ground water contamination together with work-related stress, occupational injury and pesticide toxicity were ranked as top environmental and occupational health priorities, respectively, in the region. Top training priorities included occupational health, environmental toxicology and analytic laboratory techniques with semester-long Africa-based courses as the preferred type of training for the majority of the courses. Major differences were found between the subregion's three official language groups, both in perceived health risks and training courses needed. CONCLUSIONS: The study results have implications for regional policies and practice in the area of environmental and occupational health research and training.


Subject(s)
Environmental Health , Needs Assessment , Occupational Health , Africa, Western , Biomedical Research , Humans , Surveys and Questionnaires , Teaching
7.
Int J Occup Environ Health ; 22(2): 121-7, 2016 04.
Article in English | MEDLINE | ID: mdl-27142581

ABSTRACT

BACKGROUND: Although the relation between radiographic abnormalities and spirometric impairment in people with asbestosis has been studied extensively, the extent of spirometric impairment associated with milder radiographic abnormalities is not established. OBJECTIVE: To test associations between mild radiographic abnormalities and Lower Limit of Normal (LLN)-based spirometry interpretation. METHODS: Spirometry and CXRs were collected for 1,026 at low risk of exposure to pneumoconiotic agents participants in a medical screening program. RESULTS: Individuals with each type of isolated or combined International Labour Organization (ILO) abnormalities had up to over sixfold statistically significant increase in odds of LLN-based restrictive pattern physiology (OR = 1.96, 95%CI 1.03-3.73 for parenchymal to OR = 6.09, 95%CI 1.94-19.10 for parenchymal and pleural) compared to those with normal films. CONCLUSIONS: The findings from this study confirm the association of mild profusion abnormalities with clinically relevant, LLN-based lung function abnormalities.


Subject(s)
Lung Diseases/diagnostic imaging , Lung Diseases/physiopathology , Adult , Aged , Aged, 80 and over , Female , Forced Expiratory Volume , Humans , Lung/diagnostic imaging , Lung/pathology , Lung Diseases/pathology , Male , Middle Aged , Occupational Exposure , Parenchymal Tissue/diagnostic imaging , Parenchymal Tissue/pathology , Pleura/diagnostic imaging , Pleura/pathology , Radiography , Smoking/pathology , Smoking/physiopathology , Spirometry , Vital Capacity
8.
Acad Radiol ; 23(3): 304-14, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26776294

ABSTRACT

RATIONALE AND OBJECTIVES: We evaluated the role of automated quantitative computed tomography (CT) scan interpretation algorithm in detecting interstitial lung disease (ILD) and/or emphysema in a sample of elderly subjects with mild lung disease. We hypothesized that the quantification and distributions of CT attenuation values on lung CT, over a subset of Hounsfield units (HUs) range (-1000 HU, 0 HU), can differentiate early or mild disease from normal lung. MATERIALS AND METHODS: We compared the results of quantitative spiral rapid end-exhalation (functional residual capacity, FRC) and end-inhalation (total lung capacity, TLC) CT scan analyses of 52 subjects with radiographic evidence of mild fibrotic lung disease to the results of 17 normal subjects. Several CT value distributions were explored, including (1) that from the peripheral lung taken at TLC (with peels at 15 or 65 mm), (2) the ratio of (1) to that from the core of lung, and (3) the ratio of (2) to its FRC counterpart. We developed a fused-lasso logistic regression model that can automatically identify sub-intervals of -1000 HU and 0 HU over which a CT value distribution provides optimal discrimination between abnormal and normal scans. RESULTS: The fused-lasso logistic regression model based on (2) with 15-mm peel identified the relative frequency of CT values of over -1000 HU and -900 and those over -450 HU and -200 HU as a means of discriminating abnormal versus normal lung, resulting in a zero out-sample false-positive rate, and 15% false-negative rate of that was lowered to 12% by pooling information. CONCLUSIONS: We demonstrated the potential usefulness of this novel quantitative imaging analysis method in discriminating ILD and/or emphysema from normal lungs.


Subject(s)
Lung Diseases, Interstitial/diagnostic imaging , Lung/diagnostic imaging , Radiography, Thoracic/statistics & numerical data , Tomography, X-Ray Computed/statistics & numerical data , Adult , Aged , Aged, 80 and over , Algorithms , Exhalation , False Negative Reactions , False Positive Reactions , Female , Functional Residual Capacity/physiology , Humans , Logistic Models , Male , Middle Aged , Pulmonary Emphysema/diagnostic imaging , Pulmonary Fibrosis/diagnostic imaging , Radiographic Image Interpretation, Computer-Assisted/standards , Total Lung Capacity/physiology
9.
Int J Occup Environ Health ; 21(4): 303-7, 2015.
Article in English | MEDLINE | ID: mdl-25843124

ABSTRACT

BACKGROUND: Use of alternative medications and herbal remedies is widespread in the United States and across the globe. These traditional medications can be contaminated with toxic metals. Despite several case reports of poisoning from such contamination, the epidemiological data are still limited. OBJECTIVES: To report on a cluster of lead and mercury toxicity cases in 2011 among a community of adherents of traditional medical practice of Ayurveda. METHODS: Adherents of Ayurveda were offered heavy metals screening following the identification of the index case. RESULTS: Forty-six of 115 participants (40%) had elevated blood lead levels (BLLs) of 10 µg/dl or above, with 9.6% of BLLs at or above 50 µg/dl. CONCLUSIONS: This is the largest cluster of lead and mercury toxicity following use of Ayurvedic supplements described in the literature in the US. Contamination of herbal products is a public health issue of global significance. There are few regulations addressing contamination of "natural" products or supplements.


Subject(s)
Lead Poisoning/etiology , Lead/blood , Medicine, Ayurvedic , Mercury Poisoning/etiology , Mercury/blood , Plant Preparations/adverse effects , Adult , Aged , Female , Humans , Iowa/epidemiology , Lead Poisoning/epidemiology , Male , Mercury Poisoning/epidemiology , Middle Aged
10.
Ann Clin Psychiatry ; 26(3): 171-8, 2014 Aug.
Article in English | MEDLINE | ID: mdl-25166479

ABSTRACT

BACKGROUND: Researchers examined office worker characteristics and reports of non-specific somatic symptoms in 6 non-problem buildings in the Midwestern United States. METHODS: We assessed office workers for demographic characteristics and somatic symptoms that occurred in the workplace. Sampling was conducted over a 1-week period in each building over 4 seasons. Our team administered the Medical Outcome Survey questionnaire, the Brief Symptom Inventory, and the Job Content Questionnaire to individuals at each site, comparing office workers reporting no symptoms to those reporting ≥4 symptoms. RESULTS: Self-reported nonspecific somatic symptoms were frequent in office workers in non-problem buildings. High symptom levels were associated with younger age, female sex, psychological distress, impaired quality of life, and poor job satisfaction. CONCLUSIONS: The findings suggest that office workers frequently report somatic symptoms they believe are related to the workplace even in buildings considered non-problematic. People with high symptom levels perceived as related to the workplace are psychologically distressed, have impaired quality of life, and feel dissatisfied and powerless in the workplace.


Subject(s)
Air Pollution, Indoor/statistics & numerical data , Back Pain/epidemiology , Fatigue/epidemiology , Headache/epidemiology , Job Satisfaction , Neck Pain/epidemiology , Stress, Psychological/epidemiology , Adult , Anxiety/epidemiology , Depression/epidemiology , Female , Humans , Humidity , Irritable Mood , Male , Middle Aged , Midwestern United States/epidemiology , Quality of Life , Seasons , Smoking/epidemiology , Sneezing , Surveys and Questionnaires , Temperature , Workplace , Xerophthalmia/epidemiology
11.
Sarcoidosis Vasc Diffuse Lung Dis ; 31(2): 163-9, 2014 Jul 21.
Article in English | MEDLINE | ID: mdl-25078645

ABSTRACT

Exposure to Beryllium (Be) can cause sensitization (BeS) and chronic beryllium disease (CBD) in some individuals.  Even relatively low exposures may be sufficient to generate an asymptomatic, or in some cases a symptomatic, immune response. Since the clinical presentation of CBD is similar to that of sarcoidosis, it is helpful to have information on exposure to beryllium in order to reduce misdiagnosis. The purpose of this pilot study is to explore the occurrence of Be surface deposits at worksites with little or no previous reported use of commercially available Be products.  The workplaces chosen for this study represent a convenience sample of businesses in eastern Iowa. One hundred thirty-six surface dust samples were collected from 27 businesses for analysis of Be. The results were then divided into categories by the amount of detected Be according to U.S. Department of Energy guidelines as described in 10 CFR 850.30 and 10 CFR 850.31. Overall, at least one of the samples at 78% of the work sites tested contained deposited Be above the analytical limit of quantitation (0.035 µg beryllium per sample).  Beryllium was detected in 46% of the samples collected. Twelve percent of the samples exceeded 0.2 µg/100 cm² and 4% of the samples exceeded a Be concentration of 3 µg/100 cm². The findings from this study suggest that there may be a wider range and greater number of work environments that have the potential for Be exposure than has been documented previously.  These findings could have implications for the accurate diagnosis of sarcoidosis.


Subject(s)
Berylliosis/diagnosis , Beryllium/adverse effects , Inhalation Exposure/adverse effects , Occupational Exposure/adverse effects , Sarcoidosis, Pulmonary/diagnosis , Berylliosis/epidemiology , Beryllium/analysis , Chronic Disease , Diagnosis, Differential , Environmental Monitoring , Equipment Contamination , Humans , Iowa/epidemiology , Pilot Projects , Predictive Value of Tests , Risk Factors , Sarcoidosis, Pulmonary/epidemiology , Workplace
12.
J Occup Med Toxicol ; 8(1): 26, 2013 Oct 02.
Article in English | MEDLINE | ID: mdl-24083830

ABSTRACT

INTRODUCTION: Ayurvedic medications consist of herbs that may be intentionally combined with metals, such as lead, mercury, iron, and zinc. Ayurvedic practitioners and their patients believe that the toxic properties of the metals are reduced or eliminated during preparation and processing. CASE REPORT: A 69 year old Caucasian male retired professional with a prior history of stroke presented for evaluation of new onset depression, fatigue, generalized weakness, constipation, anorexia, and weight loss. History revealed that his symptoms were temporally related to initiation of an Ayurvedic herbal medication. The patient had been previously admitted to another hospital for these symptoms and was found to have a severe anemia for which no etiology was found. Laboratory tests revealed an elevated blood lead level and a diagnosis of symptomatic lead toxicity was made. The patient was treated with intramuscular, intravenous, and oral chelation therapy to promote lead excretion. Because of complaints of continued poor mental function, neuropsychological tests were administered before and after one of the chelation treatments and showed improvement in measures of attention and other cognitive domains. In addition, the patient was able to discontinue use of antidepressant medication after chelation. DISCUSSION: A high index of suspicion of metal toxicity is necessary among persons with characteristic symptoms and signs in the absence of occupational exposure. Despite limited evidence for chelation in adults and in those with modest blood lead levels, this patient appeared to benefit from repeated chelation therapy. Both allopathic and alternative medicine practitioners and public health specialists need to be aware of the potential for contamination of and side effects from alternative pharmacologic and herbal therapies.

13.
J Occup Environ Med ; 55(7): 802-8, 2013 Jul.
Article in English | MEDLINE | ID: mdl-23787569

ABSTRACT

OBJECTIVES: To assess concordance between the fixed 70% ratio cutoff point with the fixed percent predicted values (Fixed-ratio) and the lower limit of normal (LLN) algorithms in interpreting spirometry results in an older population. METHODS: Spirometries were interpreted using Third National Health and Nutrition Examination Survey reference equations for 2319 workers. RESULTS: The Fixed-ratio algorithm characterized 34.5% (n = 801) results as abnormal, compared with 29.7% (n = 689) by the LLN. There were almost twice as many obstructive and mixed airways spirometries identified under the Fixed-ratio compared to LLN. Rates of restrictive pattern physiology were virtually the same under each algorithm. Overall agreement between the algorithms decreased with age from "almost perfect" for those younger than 60 years to "substantial" for those older than 80 years. CONCLUSIONS: This study found age-related discordance between two algorithms possibly related to the lack of reference equations and standards for individuals older than 80 years.


Subject(s)
Algorithms , Decision Support Techniques , Lung Diseases, Obstructive/diagnosis , Respiratory Insufficiency/diagnosis , Spirometry/standards , Adult , Age Factors , Aged , Aged, 80 and over , Female , Forced Expiratory Volume , Humans , Logistic Models , Male , Middle Aged , Multivariate Analysis , Nutrition Surveys , Reference Standards , Reproducibility of Results , Vital Capacity
14.
Int Arch Occup Environ Health ; 86(4): 479-88, 2013 May.
Article in English | MEDLINE | ID: mdl-22729564

ABSTRACT

PURPOSE: To assess occupational inhalation exposure to the herbicide atrazine during pesticide application in a developing country. METHODS: Personal air samples were collected during atrazine application using a personal sampling pump equipped with an OSHA Versatile Sampler (OVS-2) sorbent tube. Samples were collected from 24 pesticide applicators in Honduras. Application was observed during sampling, and a survey was completed in the home. RESULTS: Fourteen of the 24 participants used pump backpack sprayers to apply atrazine and 10 used tractor/boom systems. Despite applying about 15 times as much atrazine, the tractor/boom participants (11.5 µg/m(3)) had only slightly higher (not statistically significant) time-weighted averages (TWA) than participants using backpack sprayers (9.6 µg/m(3)). Within the backpack sprayer group, those that used a cone spray nozzle (11.54 µg/m(3)) had nearly double the TWA than applicators using a flat spray nozzle (5.98 µg/m(3); P = 0.04). In the tractor/boom group, the participants that rode on the boom or the back of the tractor monitoring nozzles (15.0 µg/m(3)) had almost double the average TWA than tractor drivers (8.0 µg/m(3); P = 0.097). CONCLUSIONS: Since tractor/boom pesticide application decreases the number of man-hours required to apply pesticides, and does not increase inhalation exposure significantly, it decreases the overall population occupational exposure. Monitoring nozzles on booms from a distance rather than on the back of a tractor or boom may decrease or eliminate inhalation exposure. Use of flat spray nozzles for herbicide application among pump backpack sprayers may reduce their inhalation exposure.


Subject(s)
Air Pollutants, Occupational/analysis , Atrazine/analysis , Herbicides/analysis , Inhalation Exposure/analysis , Weed Control/methods , Adult , Honduras , Humans , Male , Middle Aged , Risk Factors , Surveys and Questionnaires , Time Factors , Weed Control/instrumentation
15.
J Occup Environ Med ; 53(9): 1046-53, 2011 Sep.
Article in English | MEDLINE | ID: mdl-21866051

ABSTRACT

OBJECTIVE: To estimate prevalence and risk factors for International Labour Organization radiographic abnormalities, and assess relationship of these abnormalities with spirometry results in former Department of Energy nuclear weapons workers. METHODS: Participants were offered chest x-ray (CXR) and lung function testing. Three occupational medicine physicians read CXRs. RESULTS: Forty-five (5.9%) of 757 screened workers were found to have isolated parenchymal abnormalities on CXR and this rate is higher than that in many Department of Energy studies. Parenchymal and pleural and isolated pleural abnormalities were found in 19 (2.5%) and 37 (4.9%) workers, respectively, and these rates are lower than those in other Department of Energy studies to date. Lung function impairment was associated with radiographic abnormalities. CONCLUSIONS: This study found an elevated rate of parenchymal abnormalities compared to other DoE populations but the effect of age or other causes could not be ruled out.


Subject(s)
Lung Diseases/epidemiology , Lung/diagnostic imaging , Nuclear Weapons , Occupational Diseases/epidemiology , Pleura/diagnostic imaging , Pleural Diseases/epidemiology , Aged , Aged, 80 and over , Asbestos/adverse effects , Barium/adverse effects , Beryllium/adverse effects , Beryllium/immunology , Explosive Agents/adverse effects , Female , Humans , Logistic Models , Lung/physiopathology , Lung Diseases/diagnostic imaging , Lung Diseases/physiopathology , Male , Middle Aged , Occupational Diseases/diagnostic imaging , Occupational Diseases/physiopathology , Occupational Exposure/adverse effects , Pleura/physiopathology , Pleural Diseases/diagnostic imaging , Pleural Diseases/physiopathology , Prevalence , Radiography , Spirometry , Statistics, Nonparametric , United States/epidemiology
16.
Am J Ind Med ; 54(3): 194-204, 2011 Mar.
Article in English | MEDLINE | ID: mdl-21298695

ABSTRACT

BACKGROUND: The nuclear weapons industry has long been known as a source of beryllium exposure. METHODS: A total of 1,004 former workers from a nuclear weapons assembly site in the Midwest were screened for sensitization to beryllium (BeS). The screenings were part of the Department of Energy (DOE) Former Worker Program established in 1996. RESULTS: Twenty-three (2.3%) workers were found sensitized to beryllium and this prevalence was comparable to other DOE sites. Occasional, direct exposure to beryllium through machining and grinding of copper-beryllium (Cu-Be) 2% alloy tools was found to increase the risk of sensitization compared to background exposure (OR = 3.83; 95% CI: 1.04-14.03) with a statistically significant trend (P = 0.03) revealing that particular jobs are associated with sensitization. Exposure potential in this study was estimated based on job titles and not personal exposure information. CONCLUSIONS: These results confirm the need to screen workers using beryllium alloy tools in other industries and for consideration of altering work practices.


Subject(s)
Berylliosis/epidemiology , Beryllium/toxicity , Nuclear Weapons , Occupational Exposure/adverse effects , Aged , Berylliosis/diagnosis , Berylliosis/etiology , Cohort Studies , Confidence Intervals , Copper , Female , Health Status Indicators , Health Surveys , Heavy Metal Poisoning , Humans , Male , Mass Screening , Nuclear Warfare , Odds Ratio , Poisoning , Risk Assessment , United States/epidemiology
17.
J Occup Environ Med ; 53(3): 258-65, 2011 Mar.
Article in English | MEDLINE | ID: mdl-21293302

ABSTRACT

OBJECTIVE: To estimate the prevalence of beryllium sensitization among former and current Department of Defense workers from a conventional munitions facility. METHODS: Participants were screened by using Beryllium Lymphocyte Proliferation Test. Those sensitized were offered clinical evaluation for chronic beryllium disease. RESULTS: Eight (1.5%) of 524 screened workers were found sensitized to beryllium. Although the confidence interval was wide, the results suggested a possibly higher risk of sensitization among workers exposed to beryllium by occasional resurfacing of copper-2% beryllium alloy tools compared with workers with the lowest potential exposure (odds ratio = 2.6; 95% confidence interval, 0.23-29.9). CONCLUSIONS: The findings from this study suggest that Department of Defense workers with low overall exposure to beryllium had a low prevalence of beryllium sensitization. Sensitization rates might be higher where higher beryllium exposures presumably occurred, although this study lacked sufficient power to confirm this.


Subject(s)
Beryllium/adverse effects , Nuclear Weapons , Occupational Diseases/epidemiology , Occupational Exposure/adverse effects , United States Department of Defense , Adult , Aged , Aged, 80 and over , Cohort Studies , Cross-Sectional Studies , Female , Humans , Male , Middle Aged , Occupational Diseases/diagnosis , Prevalence , Risk , Risk Factors , United States
18.
AAOHN J ; 59(1): 23-32, 2011 Jan.
Article in English | MEDLINE | ID: mdl-21229935

ABSTRACT

Hispanic and Latino farmworkers are at risk for negative occupational health and safety outcomes due to issues such as their extreme work conditions, their reliance on employer beneficence, and cultural barriers. The purpose of this article is to explain the unique characteristics of heat-related illness in the Hispanic agricultural work force and to provide an overview of the problems of poor hydration and heat exposure in this population. Culturally appropriate preventive strategies are discussed because industrial-type solutions may not work in a crop production environment where language and beliefs may interfere with adaptation.


Subject(s)
Agricultural Workers' Diseases/nursing , Agricultural Workers' Diseases/prevention & control , Heat Exhaustion/nursing , Heat Exhaustion/prevention & control , Hispanic or Latino , Occupational Health Nursing/methods , Humans
19.
J Occup Environ Hyg ; 5(7): 475-81, 2008 Jul.
Article in English | MEDLINE | ID: mdl-18569510

ABSTRACT

This study evaluated the presence of beryllium surface contamination in a U.S. conventional munitions plant as an indicator of possible past beryllium airborne and skin exposure and used these measurements to classify job categories by potential level of exposure. Surface samples were collected from production and nonproduction areas of the plant and at regional industrial reference sites with no known history of beryllium use. Surface samples of premoistened wiping material were analyzed for beryllium mass content using inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and results expressed as micrograms of beryllium per 100 square centimeters (micro g/100 cm(2)). Beryllium was detected in 87% of samples collected at the munitions plant and in 72% of the samples collected at regional reference sites. Two munitions plant samples from areas near sanders and grinders were above 3.0 micro g/100 cm(2) (U.S. Department of Energy surface contamination limit). The highest surface level found at the reference sites was 0.44 micro g/100 cm(2). Workers in areas where beryllium-containing alloy tools were sanded or ground, but not other work areas, may have been exposed to airborne beryllium concentrations above levels encountered in other industries where metal work is conducted. Surface sampling provided information useful for categorizing munitions plant jobs by level of past beryllium airborne and skin exposure and, subsequently, for identifying employees within exposure strata to be screened for beryllium sensitization.


Subject(s)
Air Pollutants, Occupational/analysis , Beryllium/analysis , Firearms , Occupational Exposure/analysis , Dust/analysis , Environmental Monitoring/methods , Humans , Industry , Inhalation Exposure/standards , Interviews as Topic , Midwestern United States , Military Personnel , Occupational Exposure/standards , Risk Assessment/methods , Skin Absorption , Spectrum Analysis
20.
J Agromedicine ; 12(3): 57-69, 2007.
Article in English | MEDLINE | ID: mdl-19042671

ABSTRACT

OBJECTIVES: There are substantial health hazards to farmers and the environment associated with pesticide use in developing countries. Based on observations by the authors and previous reports, most previous studies in Africa are descriptive in nature. The aim of this study was to investigate how cotton farmers are exposed to pesticides in The Gambia and quantify their pesticide exposures and provide information for the formulation of a policy on pesticide safety for the country. METHODS: A representative sample of 20 cotton farmers in the Central and Upper River Divisions (CRD and URD) of The Gambia were surveyed by questionnaires. Dermal pesticide exposures among a subset of 10 farmer/pesticide applicators were assessed by dermal patch samples, observation, and postapplication questionnaires. RESULTS: The study revealed that a toxic organochlorine insecticide, Callisulfan (endosulfan), is frequently sprayed on cotton plants by the farmers. The farmers wore no protective equipment and were inadequately dressed for work with this pesticide. Laboratory analysis of the mixed formulation showed a wide range in the concentration of the pesticide solution among the farmer/pesticide applicators and dermal patch samples showed very high residues of endosulfan analytes on their body surfaces. CONCLUSIONS: A low level of awareness of pesticide toxicity prevails amonsg cotton farmers in The Gambia. There is a less than adequate control of pesticides and other hazardous agrichemicals in the country.


Subject(s)
Gossypium , Occupational Exposure/adverse effects , Occupational Exposure/analysis , Pesticide Residues/analysis , Pesticides/adverse effects , Adult , Aged , Deanol , Drug Combinations , Endosulfan/adverse effects , Endosulfan/analysis , Gambia , Glutamates , Humans , Male , Middle Aged , Pesticides/analysis , Protective Devices/statistics & numerical data , Skin/chemistry , Surveys and Questionnaires
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