Airflow obstruction among street vendors who refill cigarette lighters with liquefied petroleum gas

Moitra, Subhabrata; Blanc, Paul D.; Brashier, Bill

doi:10.5588/ijtld.14.0016

Cited by 11 publications

(10 citation statements)

References 20 publications

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“…The lung function tests results showed significantly lower MEF-50 and MEF-75 among petroleum refinery workers. Moitra et al, [ 23 ] reported that, subjects involved in manual cigarette lighter refilling with liquefied petroleum gas (LPG) have decrement in FEV1, FEV1/FVC Ratio. The adverse effect may be relevant to occupational group exposed to volatile hydrocarbons especially in employment sectors.…”

Section: Discussionmentioning

confidence: 99%

Lung function and fractional exhaled nitric oxide among petroleum refinery workers

Meo

Alrashed

Almana

et al. 2015

J Occup Med Toxicol

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BackgroundOccupational and environmental exposure to petroleum refinery products poses a great threat to human health. This study aimed to assess the lung function and Fractional Exhaled Nitric Oxide (FeNO) among petroleum refinery workers.MethodsIn this cross-sectional study, 112 participants (56 petroleum refinery workers with mean age 35.20 ± 1.62 years, and 56 age, weight, height, ethnicity and socioeconomically matched control subjects with mean age 30.02 ± 1.76 years) were recruited. A comprehensive clinical history and examination was conducted to decide whether to include in the study or not. Ventilatory lung function test parameters were recorded by using a Spirometer and Fractional Exhaled Nitric Oxide (FeNO) was measured by Niox Mino.ResultsA significant decline in lung function parameters FEV1 (p = 0.0001), FEV1/FVC Ratio (p = 0.01), PEF (p = 0.0001), FEF 25 % (p = 0.0001), FEF-50 % (p = 0.012) was observed among oil refinery workers compared to their matched controls. However, there was no difference in the mean values of FeNO between the groups.ConclusionSubjects working in the petroleum refinery have significantly impaired lung functions. However, there was no change in the values of FENO between the groups. The lung function impairment pattern provide evidence in the favor of an obstructive lung disease.

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Section: Discussionmentioning

confidence: 99%

Lung function and fractional exhaled nitric oxide among petroleum refinery workers

Meo

Alrashed

Almana

et al. 2015

J Occup Med Toxicol

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“…Although the translated version of this questionnaire has not been validated by formal assessment, we have employed this questionnaire in our previous studies [24–26]. Subjective respiratory complaints in the previous 12 months included: 1) acute or chronic wheezing or whistling of the chest; 2) production of phlegm; 3) acute or chronic cough; 4) breathing trouble; 5) appearance of blood in sputum (haemoptysis); and 6) skin symptoms such as dryness, rash or irritation.…”

Section: Methodsmentioning

confidence: 99%

Fungal contamination of the respiratory tract and associated respiratory impairment among sawmill workers in India

et al. 2015

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Wood processing workers are exposed to wood-associated microbiological contaminants, including fungi. Our aim was to study the potential association between sputum fungus and adverse respiratory effects in such workers.In a group of sawmill workers, we administered a respiratory questionnaire, performed lung function testing and quantified the proportions of leukocytes in spontaneously expectorated sputum samples. We identified fungal species by DNA sequencing.Of 54 sawmill workers, 19 yielded fungal positive sputum samples (mean age 42.5±10.4 years) and 35 were negative for fungus (mean age 36.9±5.2 years). The fungus was identified as Candida sp. in all samples. Those with fungal-positive sputum, compared to others, reported more cough (26% versus 63%) and haemoptysis (6% versus 37%) (both p<0.05), manifested reduced forced midexpiratory flow rates (FEF25–75%) (82.3±4.5 versus 69.2±9.9% predicted, p<0.001), and had higher sputum eosinophil counts (median 9.25 versus 3.25%, p<0.01). Reduction of FEF25–75% was associated both with fungus detection in sputum (−12.7%, 95% CI−8.5– −16.9%) and sputum eosinophils (−2.1% per 1% increase in eosinophils, 95% CI −1.5– −2.8%) (both p<0.001).In sawmill workers, Candida sp. detectable in sputum was associated with respiratory symptoms, sputum eosinophilia and reduced FEF25–75%.

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“…Respiratory symptoms were recorded using a previously used English-back Bengali-translated version of the European Community Respiratory Health Survey (ECRHS-II) questionnaire containing items on respiratory health, occupational exposure (in terms of total work experience in the sector) and lifestyle factors such as smoking habits (Moitra et al, 2013(Moitra et al, , 2014a(Moitra et al, , 2015b(Moitra et al, , 2016. Subjective respiratory complaints in the previous 12 months included: (a) acute/current or chronic/prolonged cough; (b) production of phlegm; (c) acute or chronic wheezing or whistling of the chest; and (d) breathing trouble.…”

Section: Respiratory Health Measuresmentioning

confidence: 99%

Exposure to heavy metals alters the surface topology of alveolar macrophages and induces respiratory dysfunction among Indian metal arc-welders

et al. 2018

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Background: Despite the available clinico-epidemiological evidence of heavy metal-associated respiratory health hazards among metal arc-welders, experimental confirmation of such an association is lacking. Methods: In this study, we recruited 15 metal arc-welders and 10 referent workers without direct exposure. We assessed respiratory health through a questionnaire and spirometry; estimated manganese, nickel and cadmium levels in blood, urine and induced sputum; performed differential counts of sputum leucocytes and measured plasma malondialdehyde (MDA). We used atomic force and scanning electron microscopy to assess the physical property of the alveolar macrophages (AMs) obtained from induced sputum and analysed cell surface deposition of heavy metals using energy dispersion X-ray analysis (EDX). Sputum cellular DNA damage was assessed by DNA-laddering assay. Results: There was a higher body burden of manganese and nickel in the metal arc-welders than the referents. Among major spirometric indices, only the forced mid-expiratory flow rates (FEF 25-75) were reduced in the welders compared with the referents (63.4 + 14.7 vs. 89.2 + 26.7, p < 0.01); this reduction was associated with both heavy metal levels (: À41.8, 95% CI: À78.5% to À5.1%) and plasma MDA (À0.37; À0.68 to À0.06). In metal arc-welders, significant physical and morphological changes were observed in AMs through microscopic evaluation while EDX analyses demonstrated higher deposition of heavy metals on the AM cell surface than the referents. We also observed a higher degree of DNA damage in the sputum cells of the exposed workers than the referents. Conclusion: Heavy metal exposure-induced adverse respiratory effects among metal arc-welders are mediated through haematological and cytological interactions.

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Airflow obstruction among street vendors who refill cigarette lighters with liquefied petroleum gas

Abstract: Likely heavy exposure to LPG through manually refilling cigarette lighters is associated with airflow decrements. This adverse effect may be relevant to other occupational groups heavily exposed to volatile hydrocarbons, especially those in marginal employment sectors.

Cited by 11 publications

References 20 publications

Lung function and fractional exhaled nitric oxide among petroleum refinery workers

Lung function and fractional exhaled nitric oxide among petroleum refinery workers

Fungal contamination of the respiratory tract and associated respiratory impairment among sawmill workers in India

Exposure to heavy metals alters the surface topology of alveolar macrophages and induces respiratory dysfunction among Indian metal arc-welders

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