Journal of Occupational and Environmental Hygiene最新文献

Exposure to chlorine dioxide by staff working in a gnotobiotic mouse facility at an Australian research institute was measured to determine whether current controls were sufficient to ensure their exposure remains below the current Australian workplace exposure standard. A combination of workplace surveys, interviews with workers, and personal sampling was undertaken to understand the workplace, identify higher-risk tasks, and measure the concentration of chlorine dioxide in the air where the workers conduct routine tasks involving the use of a chlorine dioxide-based disinfectant. Personal sampling utilized the validated Occupational Safety and Health Administration (OSHA) method ID-202, with minor alterations. The tasks identified as being associated with higher airborne exposure to chlorine dioxide were the use of an atomizer to fill isolator ports with aerosolized disinfectant and the use of a disinfectant dunk tank to submerge and surface decontaminate objects. The current work practices in the gnotobiotic facility were found to be compliant with the current 8-hr time-weighted average (TWA) limit of 0.1 ppm (0.28 mg/m³) but were not compliant with the 15-min short-term exposure limit (STEL) of 0.3 ppm (0.83 mg/m³). Improvements in exposure controls, such as implementing the use of a fume cupboard (hood) or other local ventilation when activating the disinfectant solution and improving the utilization of respiratory protective equipment, are therefore required to meet the STEL, but it is recommended that such improvements are also aimed at meeting the proposed Peak limitation of 0.1 ppm that is expected to soon be adopted by Safe Work Australia, replacing the current TWA-8hr and STEL exposure standards.

Crystalline silica is a Group I lung carcinogen primarily known as a causative agent for silicosis. A study was performed to quantify respirable dust, and respirable crystalline silica (RCS) in the rice mills of northeast India. Seventy-two respirable dust samples were collected from the worker's breathing zone from four rice mills at three locations: feeding, sieving, and polishing sections for two paddy varieties: Ranjit and Sali. The National Institute of Occupational Safety and Health (NIOSH), method #7602, was used to determine RCS. The results show that geometric mean TWA dust and RCS emissions in the rice mills varied from 3.97 to 455.00 mg/m³ and 0.02 to 5.38 mg/m³, respectively. RCS exposures were higher during milling of the Sali variety paddy (GM: 0.76 mg/m³) than the Ranjit variety paddy (GM: 0.25 mg/m³). Respirable dust and RCS emissions were considerably higher in the feeding and sieving sections than in the polishing section. Respirable dust and RCS exposure varied significantly (p < 0.001) with paddy variety. Respirable dust and RCS were highly correlated for different rice mills; however, the proportion of RCS in the dust was higher in the Sali variety paddy than in the Ranjit variety paddy. RCS exposure to the workers at the feeding and sieving sections was observed to be higher than the occupational exposure limits (OELs) published by Safe Work Australia, American Conference of Governmental Industrial Hygienists (ACGIH), National Institute for Occupational Safety and Health (NIOSH), Health and Safety Executive (HSE), and Factories Amendment Act, 1987, Government of India.

For over three decades, tree care workers in the United States have experienced disproportionately high rates of fatal injuries. While the types of fatalities have been well documented, few studies have used a qualitative approach to examine underlying circumstances and other contributing risk factors. In this study, a total of 69 investigative fatal injury reports spanning from 1987 to 2023 from the National Institute of Occupational Safety and Health (NIOSH) were reviewed and assessed. Overall, most fatal work incidents resulted from falls from trees, being struck by tree sections or branches, being caught, or dragged into equipment (e.g., woodchippers, stump grinders), and electrocutions. Over 23.0% of decedents had been on the job one year or less at the time of death. An estimated 58.0% of employers lacked a safety plan, and only 39.1% provided job training to employees. Recurring safety assessment recommendations stressed that employers and workers conduct thorough job hazard assessments, provide proper training, and develop and implement a work safety plan. These findings support current initiatives to implement public health policy action to protect tree care workers. Additional safety measures must be considered for new and vulnerable workers, before actively performing tree care work. The persistent occurrences of these fatal incidents demand a call to action, necessitating the adoption of a national policy that establishes uniform safety standards and mandates comprehensive training. Implementing these decisive measures will not only protect workers but also reduce costly accidents and insurance premiums, decrease lost productivity, and promote a culture of safety within the industry.

Naval shipboard operations impose numerous environmental and occupational stressors, which can adversely affect mental and physical health outcomes. Moreover, this operational setting also complicates the implementation of countermeasures to protect personnel from these stressors. Thus, any easily accessible or modifiable protective factors should be explored further for their potential to support the health of military personnel. Daily sunlight exposure is one such factor that has demonstrated positive effects on health outcomes. For the current study, sunlight exposure and self-reported health outcomes were explored in a large population of U.S. Navy personnel (N > 11,000). Mediator analyses examined the relationship between mental and physical health while controlling for key confounding variables such as morale and exercise. Although the overall regression models indicated only a slight impact on physical health, sunlight exposure had a significant direct effect on mental health even while controlling for the mediating influence of morale. Sunlight exposure also had an impact on morale and an indirect influence on mental health through morale. Additional analyses further supported the possible mental health benefits of sunlight exposure even while accounting for occupational differences. The results suggest that prescribed sunlight exposure aboard ships could be used to promote positive mental health during naval operations.

This study examines the impact of chainsaw chain type and tree species on the concentration of inhalable wood dust generated during motor-manual harvesting in forested areas. The effects of conducting real-world measurements of inhalable dust within the operator's breathing zone during forestry work are investigated. Two different chain types were evaluated: the commonly used 3/8" pitch chain (conventional chain) and the 0.325" pitch chain. Additionally, measurements were taken for three tree species: beech, oak, and pine (including both live and standing dead trees after a fire). Results showed that, overall, using the conventional 3/8" chain type yielded the highest concentration of wood dust for all three tree species. Notably, the highest wood dust concentration was observed in the burned Pinus brutia cluster, also with the 3/8" chain pitch. These findings emphasize the importance of understanding how chain type and tree species contribute to wood dust levels.

Occupational noise exposure continues to be a prevalent hazard in many industries. While the proliferation of noise dosimeters and wearable devices has made it easier to assess a worker's exposure to noise, many employees exposed to hazardous (i.e., >85 dBA) levels of noise may go their entire career without ever having their personal noise levels measured. In contrast to other occupational exposures, noise is easily perceived by the individual exposed, allowing them to develop subjective judgments regarding its characteristics. To determine whether such self-reported exposures to occupational noise are associated with hearing loss, this analysis used audiometric data and self-reported occupational exposure to loud noise from the National Health and Nutrition Examination Survey (NHANES), which has collected such data from 1999 to May 2020. Linear and logistic regressions models found a statistically significant association between self-reported noise exposure and worsened hearing at the 3, 4, 6, and 8 kHz hearing frequency as well as an elevated odds ratio for the development of hearing loss greater than 25 dB at the 2, 3, and 4 kHz audiometric frequencies. The results of this analysis suggest that in the absence of exposure measurements, workers are likely able to detect exposure to hazardous levels of noise. In these instances, additional measurements should be collected to determine if the workers should be enrolled in a hearing conservation program.

The World Health Organization and the Centers for Disease Control and Prevention (CDC) have established guidelines recommending the performance of hand hygiene routines for healthcare workers following glove removal. However, the completion of frequent hygiene routines can cause allergic and adverse skin reactions. This double-blind, randomized study aimed to address this concern by developing and evaluating a modified glove removal technique that minimizes contamination risk during routine phlebotomy procedures. Furthermore, this study used fluorescent detection to compare the frequency of contamination associated with the CDC-recommended technique and the modified technique using fluorescent detection. One hundred healthcare personnel were enrolled and divided into two groups: one group followed the CDC technique, while the other group implemented the modified technique. Participants received instructional videos and practiced under supervision. They subsequently performed blood collection using a simulation arm covered with fluorescent cream as a contamination marker. After removing gloves, hand contamination was assessed under a black light. The median time required for glove removal in the modified group was four seconds longer than that in the group that followed the CDC technique (p < 0.001). Contamination was observed in 2% (1/50) of subjects using the CDC-recommended technique, while no contamination was detected with the modified technique (p ≥ 0.05). Both the group that followed the CDC technique and the group that used modified glove removal techniques demonstrated the potential to prevent contamination during phlebotomy, thereby reducing the need for hand hygiene and the occurrence of contamination and adverse skin reactions. These findings prompt further exploration into whether proper glove removal can reduce the frequency of completing a hand hygiene routine after each glove removal, specifically within the context of phlebotomy. However, it is essential to note that hand hygiene following glove removal is still recommended to prevent contamination. Further research is warranted to validate these findings.