As most of you know, powdered infant formula is not sterile and always poses
an increased risk for infection no matter how it is handled. The origin of the
infective organisms can be in the raw materials used to make the formula or
on the equipment used during processing. Powdered formula manufacturing uses
either the dry blending process or the wet mixing-spray drying process, both of
which have vulnerable points where infective organisms are introduced.
Powdered formula is heat treated but not at high enough temperatures to destroy this
type of bacterium. E. sakazakii is fairly common-one study showed that 14% of
samples from formula around the world was contaminated with E. sakazakii. This
is certainly not a reassuring statistic for families who do not realize that
even though powdered formula is less expensive, it can bring with it an
unwanted little bonus.

Marsha Walker, RN, IBCLC
Weston, MA

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