Document Detail


Burnt sugarcane harvesting - cardiovascular effects on a group of healthy workers, Brazil.
MedLine Citation:
PMID:  23029413     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Brazil is the world's largest producer of sugarcane. Harvest is predominantly manual, exposing workers to health risks: intense physical exertion, heat, pollutants from sugarcane burning.
DESIGN: Panel study to evaluate the effects of burnt sugarcane harvesting on blood markers and on cardiovascular system.
METHODS: Twenty-eight healthy male workers, living in the countryside of Brazil were submitted to blood markers, blood pressure, heart rate variability, cardiopulmonary exercise testing, sympathetic nerve activity evaluation and forearm blood flow measures (venous occlusion plethysmography) during burnt sugarcane harvesting and four months later while they performed other activities in sugar cane culture.
RESULTS: Mean participant age was 31 ± 6.3 years, and had worked for 9.8 ± 8.4 years on sugarcane work. Work during the harvest period was associated with higher serum levels of Creatine Kinase - 136.5 U/L (IQR: 108.5-216.0) vs. 104.5 U/L (IQR: 77.5-170.5), (p = 0.001); plasma Malondialdehyde-7.5 ± 1.4 µM/dl vs. 6.9 ± 1.0 µM/dl, (p = 0.058); Glutathione Peroxidase - 55.1 ± 11.8 Ug/Hb vs. 39.5 ± 9.5 Ug/Hb, (p<0.001); Glutathione Transferase- 3.4±1.3 Ug/Hb vs. 3.0 ± 1.3 Ug/Hb, (p = 0.001); and 24-hour systolic blood pressure - 120.1 ± 10.3 mmHg vs. 117.0 ± 10.0 mmHg, (p = 0.034). In cardiopulmonary exercise testing, rest-to-peak diastolic blood pressure increased by 11.12 mmHg and 5.13 mmHg in the harvest and non-harvest period, respectively. A 10 miliseconds reduction in rMSSD and a 10 burst/min increase in sympathetic nerve activity were associated to 2.2 and 1.8 mmHg rises in systolic arterial pressure, respectively.
CONCLUSION: Work in burnt sugarcane harvesting was associated with changes in blood markers and higher blood pressure, which may be related to autonomic imbalance.
Authors:
Cristiane Maria Galvão Barbosa; Mário Terra-Filho; André Luis Pereira de Albuquerque; Dante Di Giorgi; Cesar Grupi; Carlos Eduardo Negrão; Maria Urbana Pinto Brandão Rondon; Daniel Godoy Martinez; Tânia Marcourakis; Fabiana Almeida dos Santos; Alfésio Luís Ferreira Braga; Dirce Maria Trevisan Zanetta; Ubiratan de Paula Santos
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Publication Detail:
Type:  Journal Article     Date:  2012-09-27
Journal Detail:
Title:  PloS one     Volume:  7     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2012  
Date Detail:
Created Date:  2012-10-02     Completed Date:  2013-03-05     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e46142     Citation Subset:  IM    
Affiliation:
Pulmonary Division - Heart Institute, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Adult
Agricultural Workers' Diseases / blood,  etiology*,  physiopathology
Air Pollutants, Occupational / analysis*
Blood Pressure*
Brazil
Creatine Kinase / blood
Exercise Test
Glutathione Peroxidase / blood
Glutathione Transferase / blood
Heart Rate
Humans
Male
Malondialdehyde / blood
Occupational Exposure / adverse effects*
Particulate Matter / analysis*
Prothrombin Time
Saccharum* / physiology
Sympathetic Nervous System / physiology
Thrombin Time
Chemical
Reg. No./Substance:
0/Air Pollutants, Occupational; 0/Particulate Matter; 542-78-9/Malondialdehyde; EC 1.11.1.9/Glutathione Peroxidase; EC 2.5.1.18/Glutathione Transferase; EC 2.7.3.2/Creatine Kinase
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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