"Records were not kept before 1995 in the Limpopo Province, but it is reasonable to assume that DDT was being used before that date to combat malaria.
"Although most countries have now banned the use of DDT, certain endemic malarial areas still use indoor residual spraying with DDT to decrease the incidence and spread of the disease, which is caused by mosquitoes."
The two-year study included 2,396 boys whose mothers had been exposed to DDT and 914 whose mothers had not.
A number of other factors were taken into account to rule out possible causes of the birth defects. These included smoking and drinking, the mother's age, how long she had lived in her village and her race. These all proved statistically insignificant.
The authors believe that their study highlights the importance of educating people in high-risk malaria areas about the dangers of DDT.
"The use of DDT has contributed to the success in reducing malarial transmission and malarial deaths in South and Southern Africa" says Professor Bornman.
"However, the present findings also strongly suggest that indoor residual spraying with DDT is associated with UGBDs in newborn boys.
"With global concerns about the effect of chemicals on health, and the possibility of malaria resurgence and spread as a result of climate change, all authorities should ensure that the general public, including those living under indoor residual spraying conditions, are aware of the possible health risks.
"Educating people living in the DDT-sprayed communities about ways of protecting themselves from undue DDT exposure needs to be carried out as a matter of extreme urgency.
"There must be long-term monitoring of possible environmental and human health impacts, particularly in those areas where DDT will be introduced as part of the fight against
|Contact: Annette Whibley|