Study type: Medical/biological study (experimental study)

Effects of microwave radiation on anti-infective factors in human milk med./bio.

By: Quan R, Yang C, Rubinstein S, Lewiston NJ, Sunshine P, Stevenson DK, Kerner Jr JA
Published in: Pediatrics 1992; 89 (4) Pt 1: 667-669
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Aim of study (acc. to author)

To evaluate the effects of microwave treatment on several of the anti-infective factors in human milk.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
Exposure duration: 30 min
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General information

No details available.

Exposure 1

Main characteristics
Type
Exposure duration 30 min
Additional info Altough it is specified that high, medium and low microwave were used there are no details available.
Exposure setup
Exposure source
Setup Samples were placed into individual glass test tubes and they were placed in a plastic stand in the center of a Litton microwave.
Parameters

No parameters are specified for this exposure.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Microwaving at 72°C to 98°C caused a marked decrease in activity of all the tested antiinfective factors. E. coli growth at > or = 98°C was 18 times that of control human milk. Microwaving at 20°C to 53°C had no significant effect on total IgA, specific IgA to E. coli serotypes 01 and 04, but did significantly decrease lysozyme and specific IgA to E. coli serotype 06. Even at 20°C to 25°C, E. coli growth was 5 times that of control human milk. Microwaving appears to be contraindicated at high temperatures, and questions regarding its safety exist even at low temperatures.

Study character:

Study funded by