Epidemiological profile of occupational risks associated with artisanal burning of plastic materials in Parakou / Profil épidémiologique des risques professionnels associés au brûlage artisanal de matières plastiques à Parakou

Introduction: Burning plastic releases toxic fumes and gases. More and more people engage in the professional activity of welding plastic parts by fusion in Benin. Hence the need for this study. Purpose of research: To assess the frequency of the various occupational risks associated with the welding of plastic materials by burning in Parakou. A cross-sectional, descriptive, and analytical study focused on plastic welders in Parakou. The data was collected using a questionnaire. The variables studied were accidents at work, occupational diseases, and socio-professional characteristics. The data was analyzed by Epi info version 7.2.1.0. The significance level was set at p < 0.05. Results: A total of 137 subjects were surveyed. They were all male. Almost all of them were victims of accidents at work. The lesions were mainly on the fingers (99%) and feet (99%). The most expressed morbid manifestations were musculoskeletal disorders (98%), rhinitis (87%), cough (79%), tearing (98%) and conjunctival hyperemia (93%). Conclusions: Plastic welding in Parakou is a high health risk activity for craftsmen. It is urgent to take protective measures for these craftsmen.

Introduction: La combustion du plastique dégage des fumées et des gaz toxiques. De plus en plus de personnes se livrent à l'activité professionnelle de soudage de pièces en plastique par fusion au Bénin, d'où la nécessité de cette étude. But de l'étude: Évaluer la fréquence des différents risques professionnels associés au soudage de matières plastiques par brûlage à Parakou. Il s'agit d'une étude transversale, descriptive et à visée analytique qui a porté sur les soudeurs de plastiques à Parakou. Les données ont été collectées à l'aide d'un questionnaire. Les variables étudiées étaient l'accident du travail, les maladies professionnelles et les caractéristiques socioprofessionnelles. Les données ont été analysées par Épi info version 7.2.1.0. Le seuil de signification a été fixé à p < 0,05. Résultats: Au total 137 sujets ont été enquêtés. Ils étaient tous de sexe masculin. La quasi-totalité d'entre eux était victime d'accidents du travail. Les lésions siégeaient surtout aux doigts (99 %) et aux pieds (99 %). Les manifestations morbides les plus exprimées étaient les troubles musculo-squelettiques (98 %), la rhinite (87 %), la toux (79 %), le larmoiement (98 %) et l'hyperhémie conjonctivale (94 %). Conclusions: Le soudage de plastique à Parakou est une activité à risque sanitaire élevé pour les artisans. La prise de mesures protectrices pour ces artisans est urgente.

Comparison of motorcycle taxi driver's respiratory health using an air quality standard for carbon monoxide in ambient air: a pilot survey in Benin.

INTRODUCTION: Ambient air quality standards are not designed to protect people occupationally exposed to outdoor air pollution on a routine basis. This study aimed to assess the effect of exceeding the US ambient air quality standard for carbon monoxide (CO) on motorcycle taxi drivers respiratory health. METHODS: A cross-sectional study of 85 current motorcycle taxi drivers with at least 5 years of job tenure in Cotonou (Benin) was conducted. Personal CO was measured with a portable CO data logger for 8 hours per day during working hours. A questionnaire on respiratory symptoms was administered to participants and spirometry was performed. Participants were divided into two groups, those with exposure to CO >9 ppm and ≤9 ppm, according to the US Environmental Protection Agency (EPA) National Ambient Air Quality Standard which is an 8-hour average of 9ppm. 8 and 10 ppm were also used an exposure limit. Analysis was done using these two groups. RESULTS: Socio-demographic characteristics were well balanced between the two study groups. The drivers with a CO exposure of more than 9ppm had non-significantly more respiratory symptoms (OR=1.67; 95%CI:0.26,10.74), lower FVC and FEV1 compared to the less exposed group but they have a significant lower PEF (-10%, p=0.02). When we used an exposure limit of 8 or 10 ppm the results were not statistically different. CONCLUSION: Drivers with a CO exposure >9 ppm tend to have more respiratory problems. More research is needed to reinforce this result in order to improve air quality standards to protect workers occupationally exposed to outdoor air pollution.

Health Risks Associated with Occupational Exposure to Ambient Air Pollution in Commercial Drivers: A Systematic Review.

Ambient air pollution is a major global health problem and commercial drivers are particularly exposed to it. As no systematic assessment of the health risks associated with occupational exposure to ambient air pollution in this population had yet been carried out, we conducted a systematic review using a protocol-driven strategy. Papers published from inception to April 20, 2018 in MEDLINE, EMBASE, CINAHL, African journals online, the Cochrane library, ISRCTN WHO ICTRP, and the Web of Science and Scopus databases were screened for inclusion by two independent reviewers. Original articles with at least an available abstract in English or French were included. The initial search retrieved 1454 published articles of which 20 articles were included. Three studies reported a significant difference in white blood cells (106/L) among commercial motorcyclists compared to rural inhabitants (5.041 ± 1.209 vs. 5.900 ± 1.213, p = 0.001), an increased risk of lung cancer (RR = 1.6, 95%CI 1.5⁻1.8) in bus drivers and an increased standardized mortality ratio (SMR) in bus drivers from Hodgkin's lymphoma (SMR 2.17, 95%CI 1.19⁻3.87) compared to white-collar workers. Other studies also found that drivers had more oxidative DNA damage and chromosome breaks. Four papers failed to demonstrate that the drivers were more exposed to air pollution than the controls. Three other studies also reported no significant difference in lung function parameters and respiratory symptoms. The genetic polymorphisms of detoxifying enzymes were also not homogeneously distributed compared to the controls. There is some evidence that occupational exposure to ambient air pollution among commercial drivers is associated with adverse health outcomes, but the existing literature is limited, with few studies on small sample size, methodological weaknesses, and contradictory findings-thus, further research is recommended.

Cotton Dust Exposure and Respiratory Disorders among Textile Workers at a Textile Company in the Southern Part of Benin.

The textile industry sector occupies a prominent place in the economy of Benin. It exposes workers to several occupational risks, including exposure to cotton dust. To assess the effect of exposure to cotton dust on the health of workers, this study was initiated and conducted in a Beninese cotton industry company. The objective of the study was to evaluate the respiratory disorders among the textile workers exposed to cotton dust and the cross-sectional study involved 656 subjects exposed to cotton dust and 113 non-exposed subjects. The methods used are mainly based on a survey using a questionnaire of organic dust designed by the International Commission of Occupational Health (ICOH); and on the measures of lung function parameters (FEV1 and FVC). The main results of the different analyzes revealed that subjects exposed to cotton dust have more respiratory symptoms than unexposed subjects (36.9% vs. 21.2%). The prevalence of chronic cough, expectorations, dyspnoea, asthma and chronic bronchitis are 16.8%, 9.8%, 17.3%, 2.6%, and 5.9% respectively among the exposed versus 2.6%, 0.8%, 16.8%, 0% and 0.8% among the unexposed subjects. The prevalence of byssinosis is 44.01%.The prevalence of symptoms is dependent on the sector of activity and the age of the subject. These results should encourage medical interventions and technical prevention especially since the textile industry occupies an important place in the Benin's economy.