RFI Source for white mosquito netting (14)
A few comments on your last message [Source for white mosquito net-
* You seem to avoid answering specific questions by referring to your
website but for many Africans it is impossible or very expensive to
get/stay connected long enough to gather the requested information.
Therefore it is only fair to all of us concerned that you give us the
requested data by e-mail (without attachments) instead of advertising
your company web-site.
* I'm a lucky one and have visited your website. Looking at the re-
sults of your laboratory studies, I was not impressed. A study done
with only 20 mosquitoes (which type?) can hardly be called serious
enough to base your results on. Can you indicate the results of field
trials done with the Permanet used by typical villagers against real
malaria? (There's a story going around in Tanzania that your WHOPES
trials gave results no better than normally treated nets.)
* When in your website you speak of ®Savon de Marseille¯ you are
talking about the ®western¯ soap which may be found in supermarkets.
African soaps usually contain high levels of caustic soda and no
lanolin. Did you ever do any washes with local African soaps? If so,
were the results better or worse when washed with the weak western
soap (or detergents such as Omo)
* You state that a child has to eat approx. 50 bednets to get a toxic
dose: Such a statement clearly shows you are unaware/misinformed
about your data. According to Barlow, Sullivan & Lines (2001)- Risk
Assessment of the use of deltamethrin on bednets for prevention of
malaria - oral AEL (acceptable exposure level) is 1 mg/kg/day body
weight. Each Permanet has about 800 mg on it. For a 10 kg child this
exceeds even the highest margin of safety, to put it mildly!
Unless you can come up with confirmation that you're using the Olyset
method or give us data with precise amount of active ingredient com-
ing of the net per wash, I conclude that a Permanet gives unaccept-
able risks to all users, especially to babies (most likely to suck
the net) as well as the potential environmental impact from the ef-
fluent of washing your over-dosed nets.
Until now, I am not convinced that your sales talk is evidence-based.
By avoiding giving relevant information and communicating satisfac-
tory results obtained during field trials, you not only make people
confused but also you have not proved that your product fulfils the
impossible dream of safe and permanently insecticidal nets.
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For additional assistance, send mail to: `<firstname.lastname@example.org>'.