Residues of some organochlorine pesticides in human blood in the Fadasi Area, Sudan

For many years, organochlorine pesticides [OCPs] have been of interest, because of their toxicity and high persistence .In developing countries, [OCPs] were used in large quantities to control agricultural pests and vectors of endemic diseases. In Sudan [OCPs] were restricted to public health purposes in 1981. This study was conducted to asses the residue levels in the human blood. A randomized population sample from Fadasi Village, which is located in a rural area where pesticides have been used for over 35 years were examined. Analysis of human blood revealed the presence of gamma HCH, aldrin, heptachlor epoxide and DDE in varying concentrations. Statistical correlation was found to exist between the pesticide concentration and age, weight and duration of exposure. DDE was present in high concentrations, ranging between 0.38 - 6.88 ppm

Concentraciones de DDT/DDE y riesgo de hipospadias: un estudio piloto de casos y controles / DDT/DDE concentrations and risk of hypospadias: a case-control pilot study

OBJETIVO: Evaluar la asociación entre los niveles séricos maternos de DDT/DDE y el riesgo de hipospadias. MATERIAL Y MÉTODOS: Estudio de casos y controles, efectuado en la Ciudad de México durante el periodo 1997-1999, con 41 casos de hipospadias y 28 controles. La informacion obtenida por cuestionario y las muestras sanguíneas fueron evaluadas mediante modelos multivariados de regresión logística. RESULTADOS: Las concentraciones materna de DDT y DDE no mostraron asociación con el riesgo de hipospadias (RM 1.13; IC 95 por ciento 0.24-5.29 y RM 0.48; IC 95 por ciento 0.15-1.60, respectivamente). Los predictores encontrados fueron hijos de madres con mayor edad (RM 8.69; IC 95 por ciento 1.69-44.9), y la actividad laboral durante el embarazo (RM, 4.68; IC 95 por ciento 1.15-18.9). CONCLUSIONES: Dado que se cuenta con escasa información sobre los efectos endocrinos a diferentes concentraciones de DDT/DDE en humanos, la dosis pudiera ser un factor determinante sobre el tipo de efecto.

OBJECTIVE: To evaluate the association between maternal serum DDT/DDE levels and risk of hypospadias. MATERIAL AND METHODS: A case-control study in Mexico City was conducted during 1997-1999 among 41 subjects with hypospadias and 28 controls. Blood samples were obtained from study subjects. Information was obtained using a standardized questionnaire. Data were analyzed using multivariate logistic regression models. RESULTS: Maternal DDT and DDE levels showed no association with hypospadias (OR 1.13; 95 percent CI 0.24-5.29 and OR=0.48; 95 percent CI 0.15-1.60, respectively). Associated factors were older age of mothers (OR 8.69; 95 percent CI 1.69-44.9), and working during pregnancy (OR 4.68; 95 percent CI 1.15-18.9). CONCLUSIONS: Information about the endocrine effects of different levels of DDT/DDE in human subjects is scarce; dosage may be a determinant factor of the type of effect.