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Occupational exposure to insecticides and their effects on the auditory system.

Authors
Teixeira-CF; Augusto-LSG; Morata-TC
Source
Noise Health 2002 Jan-Mar; 4(14):31-39
NIOSHTIC No.
20022796
Abstract
The objective of this investigation was to study the effects of occupational exposure to organophosphates and pyrethroid insecticides on the central auditory system. The study group consisted of 98 workers exposed to insecticides and 54 non-exposed workers. Data on work history, medical history, present diseases, occupational and non-occupational exposure to noise or chemicals and lifestyle factors were obtained through an interview. Central auditory system functions were assessed through frequency patterns and duration patterns testing. Fifty-six percent of the exposed workers had hearing dysfunction at the central level and its relative risk was 7.58 for the group with exposure to insecticides (95% CI 2.9- 19.8) when compared to the non-exposed group. The group exposed to insecticides and noise had a relative risk for central disorders of 6.5 (95% CI 2.2-20.0) when compared to the non-exposed group and 9.8 (95% CI 1.4-64.5) when compared to the group exposed only to noise. The finding suggests that exposure to organophosphates and pyrethroid products can induce damage to central auditory system. Further research is needed on the ototoxic mechanisms of these chemicals, and on hearing loss prevention measurements that are applicable and adequate to such risks and populations.
Keywords
Neurophysiology; Neurotoxic-effects; Psychological-reactions; Ototoxicity; Noise; Organic-compounds; Hearing-loss; Hearing; Neuropathy; Pesticides; Organo-phosphorus-pesticides; Organo-phosphorus-compounds
Contact
AUDIOCLINICA. Praca do Derby, 177, Derby, Recife PE 52010-140 Brazil
CODEN
NHOEA4
CAS No.
7664-38-2; 50-29-3; 71-43-2
Publication Date
20020101
Document Type
Journal Article
Email Address
lcteix@elogica.com.br
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Issue of Publication
14
ISSN
1463-1741
NIOSH Division
DART
Priority Area
Disease and Injury: Hearing Loss
Source Name
Noise & Health
State
OH
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