RESUMO
Organochlorine pesticides have been used in Mexico in malaria control programs and against ectoparasites. The objective of this study was to compare the levels of organochlorine pesticides: HCB, α-ß-γ-HCH, pp'-DDE, op'-DDT and pp'-DDT in adipose tissue of female inhabitants from three Mexican states: Veracruz, Puebla and Tabasco. Data analyses indicated higher ß-HCH levels in Puebla inhabitants. When comparing the mean values of the pp'-DDE concentrations among the three states, no statistically significant differences were noted. A trend of increasing concentrations of op'-DDT from Veracruz to Puebla and Tabasco was observed. Significantly higher pp'-DDT concentrations in Veracruz as compared to Puebla and Tabasco were determined. Using factorial analysis of three age categories (>30, 31-50, <51) organochlorine pesticide concentrations increases with age of participants, indicating time of exposure as a principal factor of organochlorine pesticides accumulation in adipose tissue.
Assuntos
Tecido Adiposo/metabolismo , DDT/análise , Diclorodifenil Dicloroetileno/análise , Exposição Ambiental/análise , Hexaclorocicloexano/análise , Praguicidas/análise , Tecido Adiposo/química , Adulto , DDT/metabolismo , Diclorodifenil Dicloroetileno/metabolismo , Feminino , Hexaclorocicloexano/metabolismo , Humanos , Malária/prevenção & controle , México , Pessoa de Meia-Idade , Resíduos de Praguicidas/análise , Resíduos de Praguicidas/metabolismo , Praguicidas/metabolismoRESUMO
The objective of this study was to determine the levels of organochlorine pesticides HCB, α-ß-γ-HCH, p,p'-DDE, o,p'-DDT and p,p'-DDT in 150 adipose tissue of inhabitants of Tabasco, Mexico. The following pesticides were detected: p,p'-DDE in 100% of samples at mean 1.034 mg/kg; p,p'-DDT in 96.7% at mean 0.116 mg/kg; o,p'-DDT in 78.7% at mean 0.022 mg/kg and ß-HCH in 58.0% at mean 0.049 mg/kg. The pooled sample was divided according to sex of donors (75 female and 75 male). Significantly higher levels of all organochlorine pesticides in females were found. The sample was divided into three age's ranges (15-28, 29-45 and 46-84 years). The mean and median levels of ß-HCH, p,p'-DDE and Σ-DDT increase significantly (p < 0.05) from the first to the second and third group. The presence of organochlorine pesticide residues in Tabasco inhabitants is still observed, indicating sources of exposure to the pesticides.
Assuntos
Tecido Adiposo/metabolismo , Exposição Ambiental/análise , Poluentes Ambientais/metabolismo , Resíduos de Praguicidas/metabolismo , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , DDT/metabolismo , Diclorodifenil Dicloroetileno/metabolismo , Exposição Ambiental/estatística & dados numéricos , Feminino , Hexaclorobenzeno/metabolismo , Hexaclorocicloexano/metabolismo , Humanos , Hidrocarbonetos Clorados/metabolismo , Masculino , México , Pessoa de Meia-Idade , Adulto JovemRESUMO
Ambient PM2.5 samples were taken at 24 h intervals at two sites (Centro and Miravalle) in the city of Guadalajara from January to June 2008. The Centro site is located in the downtown, while the Miravalle site is located in an industrial zone south of the downtown. For both sites the higher concentrations of PM2.5 were between January and May. High correlation coefficients between sulfate, nitrate and ammonium of 0.95, 0.92 and 0.91, respectively, showed low variations in the concentrations of these species in the city. It was estimated that sulfate, nitrate and ammonium represented almost 47% of the PM2.5 mass in June at the Centro site, but in general the contributions in the other months were less than 21%, while at Miravalle this percentage was between 7.7% and 27.6%.