Noise exposure in occupational setting associated with elevated blood pressure in China.

Background: Hypertension is the primary out-auditory adverse outcome caused due to occupational noise exposure. This study investigated the associations of noise exposure in an occupational setting with blood pressure and risk of hypertension.

Methods: A total of 1,390 occupational noise-exposed workers and 1399 frequency matched non-noise-exposed subjects were recruited from a cross-sectional survey of occupational noise-exposed and the general population, respectively.

[Toxic effects of mixture of volatile organic compounds on mice testis related enzymes and hormones].

Objective: To evaluate the toxic effects of mixture of volatile organic compounds (VOCs) on Mice Testis related enzymes and hormones.

Methods: After determining the median lethal dose (LD₅₀) of VOCs using the acute toxicity test, 40 male clean inbred Kunming mice were assigned to 1/8 LD₅₀ VOCs exposure group, 1/4 LD₅₀ VOCs exposure group, and 1/2 LD₅₀ VOCs exposure group, as well as positive control group with cyclophosphamide (60 mg/kg) and negative control group with tea oil, with 8 mice in each group. The mice were intraperitoneally injected with respective agents for 5 days.

Associations of genetic variations in EYA4, GRHL2 and DFNA5 with noise-induced hearing loss in Chinese population: a case- control study.

Background: Both environmental and genetic factors are attributable to the incidence of noise-induced hearing loss (NIHL). The purpose of this study was to examine the associations between genetic variations in the EYA4, GRHL2 and DFNA5 genes and the risk to noise-induced hearing loss (NIHL) in a Chinese population.

Methods: A case-control study was conducted with 476 NIHL workers and 475 normal hearing workers matched with gender, years of noise exposure, and intensity of noise exposure.

[Observation of immunity level of pertussis-diphtheria-tetanus in healthy people in Hangzhou City during 1995-2006].

Objective: To study the pertussis-diphtheria-tetanus immunity level of healthy people in Hangzhou.

Methods: Pertussis antibody, diphtheria antitoxin and tetanus antitoxin were tested. We carried out surveillance in different counties among the people at 2-4, 6-8, 13-15, 25-39 age group during 1995-2006.