Navigation Links
Increased clumsiness in former welders
Date:2/6/2012

Welders who are exposed to manganese from welding fumes, risk developing increased clumsiness and the result may remain decades after exposure has ceased. This is the finding of a study at the University of Gothenburg, Sweden, of former shipyard workers.

It is estimated that 35,000 people in Sweden work full-time with welding, while many more carry out welding as one of several workplace activities. Previous research has shown that the concentration of manganese in the air during welding often lies at levels that can give immediate negative effects on the central nervous system, but the long-term effects of exposure to manganese have been essentially unexplored.

Effects on fine motor skills

Scientists at the Sahlgrenska Academy, University of Gothenburg, have now shown in a study of former shipyard workers in Gothenburg that long-term exposure to manganese can give permanent effects on fine motor skills almost 20 years after the exposure has ceased.

Test on Gothenburg welders

Scientist Gunilla Wastensson of the Department of Occupational and Environmental Medicine at the Sahlgrenska Academy has examined 17 former shipyard welders who worked at the shipyards in Gothenburg. The average period that had passed since they stopped welding was 18 years. The average period during which the participants had worked with welding was 28 years. They were given several tests to measure manual dexterity and motor speed, eye-hand coordination, tremor and balance. Their test results were compared to 21 other shipyard workers who had worked with other tasks, such as filers and electricians.

Total individual mangan exposure

The investigation showed that shipyard welders performed less well than the other shipyard workers in a test of manual dexterity and motor speed. The scientists also calculated a measure of total manganese exposure for each individual.

"The investigation showed that individuals with higher total manganese exposure had a poorer performance. We interpret this as a possible remaining effect of previous exposure to manganese, which is remarkable, given that so long a period had passed since they stopped welding", says Gunilla Wastensson.

First study of long-term effects

The study is the first to examine the effects a considerable period after the exposure to manganese has ceased. The results are worrying, but Gunilla Wastensson emphasises that they must be confirmed in further studies.
"Recent improvements in the work environment mean that the levels are lower now, but further measures to improve the situation associated with exposure to manganese at work are important", she says.

MANGANESE

Manganese is a metal that occurs naturally in the environment and in our bodies, where it is important in processes such as the turnover of carbohydrates and fats. People who are occupationally exposed for long periods to dust and fumes that contain high concentrations of manganese run the risk of developing, in rare cases, manganism. This is a disease with symptoms similar to those of Parkinson disease. It is caused by an accumulation of manganese in particular regions of the brain known as the basal ganglia, which are important for controlling body movement. Manganese is slowly excreted once exposure to the metal ends. The threshold limit value for manganese in air has been severely reduced in recent years, and is now 0.2 mg/m3 for total dust, and 0.1 mg/m3 for respirable dust. There is, however, a serious risk that the threshold limit value for manganese is exceeded at many welding locations. A proposal has been put forward in the US to reduce the threshold limit value to 0.02 mg/m3.


'/>"/>
Contact: Gunilla Wastensson
gunilla.wastensson@amm.gu.se
46-317-862-894
University of Gothenburg
Source:Eurekalert  

Related biology news :

1. Sleep deprivation tied to increased nighttime urination in preadolescence
2. Discovery of plant nourishing gene brings hope for increased crop seed yield and food security
3. Increased risk of developing asthma by age of 3 after cesarean
4. Targeting bacterial gas defenses allow for increased efficacy of numerous antibiotics
5. BUSM: Severe sepsis, new-onset AF associated with increased risk of hospital stroke, death
6. Conservationists call for increased focus on coastal ecosystems
7. Gene variant leads to better memory via increased brain activation
8. Research to improve photosynthesis for increased food and fuel production
9. Newly identified DNA repair defect linked to increased risk of leukemia relapse
10. Increased celiac disease prevalence in women with unexplained infertility
11. Increased tropical forest growth could release carbon from the soil
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Increased clumsiness in former welders
(Date:11/14/2016)... 14, 2016  Based on its recent ... & Sullivan recognizes FST Biometrics with the ... Visionary Innovation Leadership. FST Biometrics emerged as ... market by pioneering In Motion Identification (IMID) ... seamless, and non-invasive verification. This patented solution ...
(Date:6/22/2016)... 22, 2016   Acuant , the ... solutions, has partnered with RightCrowd ® ... Visitor Management, Self-Service Kiosks and Continuous Workforce ... add functional enhancements to existing physical access ... venues with an automated ID verification and ...
(Date:6/20/2016)... , June 20, 2016 Securus Technologies, ... technology solutions for public safety, investigation, corrections and ... prisons involved, it has secured the final acceptance ... facilities for Managed Access Systems (MAS) installed. Furthermore, ... facilities to be installed by October, 2016. MAS ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... 2016  The Multiple Myeloma Research Foundation (MMRF) today ... Study SM —the largest and most comprehensive study driving ... myeloma—will be presented at the 58 th American ... San Diego from December 3-6. ... as well as identify pathways and targets for new ...
(Date:12/2/2016)... -- Research and Markets has announced the addition ... Companies" to their offering. ... , , ... industries is anticipated. Nanotechnology will be applied at all stages ... diagnostic applications in clinical trials. Many of the assays based ...
(Date:12/2/2016)... ... 2016 , ... Aerocom Healthcare ( http://www.aerocomhealthcare.com ), representing the ... chain-of-custody solution for tracking and securing medications at booth 676 at the ASHP ... Aerocom has a proven solution for tracking medications via its system from pharmacy ...
(Date:12/2/2016)... ... 01, 2016 , ... DrugDev believes the only way to achieve ... experience. All three tenets were on display at the 2nd Annual DrugDev User Summit ... sponsor, CRO and site organizations to discuss innovation and the future of clinical research. ...
Breaking Biology Technology: