I've taken the time to read through the test results by Bio-Research
Laboratories.
Here is some of the information from their tests:
Method:
A microbiological assay was used to evaluate the potency of each sample
against five different microorganisms (Candida albicans, Staphylococcus
aureus, Salmonella typhi, Streptococcus faccium, Escherichia coli). Each
organism was grown as a continuous lawn and zones of inhibition were
measured to determine the minimum inhibitory concentration of the products.
A zone of less than 10 mm in diameter has been defined as having no
inhibition.
Procedure:
Sterile swabs were used to streak each trypticase soy agar (TSA) plate from
a 0.5 McFarland standard of each microorganism. Four agar plugs were then
removed from each plate to provide a reservoir for a series of log
dilutions made from each sample in sterile deionized water. A series of
four dilutions were made from 10^^-1 (0.1 g/ml) to 10^^-4 (0.0001 g/ml).
Each agar well was filled with 0.1 ml at each dilution. The agar was
allowed to absorb dilutions and plates were incubated face up for 24 hours
at 37 degrees C. The zones of inhibition were then measured.
All microorganisms tested showed some inhibition to Microdyn with a gradual
decline in effect and finally a no effect dilution.
At a concentration of 0.01 grams of Microdyn per ml of sterile deionized
water, Candida Albicans was not inhibited (e.g. did not maintain at least a
10 mm zone free of the microorganism). Staphylococcus aureus was inhibited
in a 10 mm diameter zone, Salmonella typhi was inhibited in a 12 mm zone,
Streptococcus faccium was inhibited in a 10 mm zone and Escherichia coli
was inhibited in a 14 mm zone.
At a concentration of 0.1 grams of Microdyn per ml of sterile deionized
water Candida albicans was inhibited in a 20 mm zone, Staphyloccous aureus
was inhibited in a 19 mm diameter zone, Salmonella typhi was inhibited in
a 25 mm zone, Streptococcus faccium was inhibited in a 16 mm zone and
Escherichia coli was inhibited in an 18 mm zone.
According to the tests the minimum concentrations required to maintain at
least a 10 mm microorganism free zone was as follows:
Can Staph Sal Strep Esch
Nutri Biotic .001 .0001 .0001 .001 .001
Microdyn Silver .1 .01 .01 .01 .01
Suprayod .01 .01 .01 .1 .1
Clorox .001 .01 .01 .1 .01
Maleleuca .01 .01 .01 .1 .01
OK, that's the essence of the report. What I couldn't tell from the test
results was the ppm of Microdyn Silver Oxide. For that matter, I'm not
even sure that Microdyn Silver Oxide is what we call Colloidal Silver. Is
anyone familiar with Microdyn Silver Oxide? It would help if we knew
whether it is made essentially the same way we make it and whether it is 5
ppm or 30 ppm, for example.
Also, I've never dealt with Suprayod. Many thanks to those of you who
explained that Maleleuca is TEA TREE OIL -- an anti-parasitic.
The tests on everything but Maleleuca were run in 1995. The Maleleuca test
was run early in 1998.
So, now you know all that I do. Any comments?
Bob Wells
