El día 15/09/06, Pedro J Hernández González<div><span class="gmail_quote"><b class="gmail_sendername"></b> <<a href="mailto:pedroj.hernandezgonzalez@gobiernodecanarias.org">pedroj.hernandezgonzalez@gobiernodecanarias.org
</a>> escribió:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">El tema salió varias veces en la lista y personalmente quedé bastante
<br>convencido de que los efectos nocivos del DDT son francamente<br>discutibles como para obviar sus efectos beneficiosos. Ahora parece que<br>algunos empiezan a planterselo<br><br><a href="http://news.bbc.co.uk/2/hi/science/nature/5350068.stm">
http://news.bbc.co.uk/2/hi/science/nature/5350068.stm</a><br><br></blockquote></div>Pues no sé que decirte ¿No estaremos ante otro de esos casos de que no
es bueno para nosotros, pero sí para los pobrecitos del tercer munndo?
Lo digo por este reciente artículo español:<br><br> Am J Epidemiol. 2006 Sep 12; <br>In Utero Exposure to Background Concentrations of DDT and Cognitive Functioning among Preschoolers.<br><br>* Ribas-Fito N, * Torrent M, * Carrizo D, * Munoz-Ortiz L, * Julvez J, * Grimalt JO, * Sunyer J.
<br><br>Respiratory and Environmental Health Research Unit, Institut Municipal Investigacio Medica (IMIM), Barcelona, Catalonia, Spain.<br><br>p,p'-DDT (bis[p-chlorophenyl]-1,1,1-trichloroethane) is a persistent organochlorine compound that has been used worldwide as an insecticide. The authors evaluated the association of cord serum levels of DDT and its metabolite, 2,2-bis(p-chlorophenyl)-1,1-dichloroethylene (DDE), with neurodevelopment at age 4 years. Two birth cohorts in Ribera d'Ebre and Menorca (Spain) were recruited between 1997 and 1999 (n = 475). Infants were assessed at age 4 years by using the McCarthy Scales of Children's Abilities. Organochlorine compounds were measured in cord serum. Children's diet and parental sociodemographic information was obtained through questionnaire. Results showed that DDT cord serum concentration at birth was inversely associated with verbal, memory, quantitative, and perceptual-performance skills at age 4 years. Children whose DDT concentrations in cord serum were >
0.20 ng/ml had mean decreases of 7.86 (standard error, 3.21) points in the verbal scale and 10.86 (standard error, 4.33) points in the memory scale when compared with children whose concentrations were <0.05 ng/ml. These associations were stronger among girls. Prenatal exposure to background, low-level concentrations of DDT was associated with a decrease in preschoolers' cognitive skills. These results should be considered when evaluating the risk and benefits of spraying DDT during antimalaria and other disease-vector campaigns.
<br><br>Saludos.<br><br clear="all"><br>-- <br>Ramón Díaz-Alersi