I just did a quick search on PubMed and yes - Listeria has been
isolated from cabbage (see an example below).
However, we need a microbiologist to comment on this. The risk of
Listeria in pregnant women is miscarriage; are infants at risk if they
become infected with Listeria?
We have always said that if a woman is going to apply cabbage leaves
to her breast that the leaves should be well washed (don't forget tetanus
spores in soil) and not to apply the leaves directly to her nipple area.
Lisa Amir
MBBS, MMed, IBCLC in Melbourne, Australia
Appl Environ Microbiol. 1989 Aug;55(8):1925-7.
Listeria spp. found on fresh market produce.
Heisick JE, Wagner DE, Nierman ML, Peeler JT.
Center for Microbiological Investigations, Food and Drug Administration,
Minneapolis, Minnesota 55401.
From October 1987 to August 1988, 1,000 tests were conducted on 10 types of
fresh produce from two Minneapolis area supermarkets to detect Listeria spp.
The produce included broccoli, cabbage, carrots, cauliflower, cucumbers,
lettuce, mushrooms, potatoes, radishes, and tomatoes. The vegetables were
tested by the Food and Drug Administration method for isolation of Listeria
spp., with the addition of LiCl-phenylethanol-moxalactam agar in the last
280 tests; 8.6 and 11.4% of these tests were positive by modified McBride
and LiCl-phenylethanol-moxalactam agars, respectively. Listeria
monocytogenes was isolated from cabbage, cucumbers, potatoes, and radishes;
L. innocua was isolated from cucumbers, lettuce, mushrooms, potatoes, and
radishes; L. seeligeri was isolated from cabbage and radishes; and L.
welshimeri was isolated from cucumbers, potatoes, and radishes. The isolates
were of various serotypes; however, the L. monocytogenes isolates were
predominantly serotype 1 (82%). Only potatoes (25.8% positive) and radishes
(30.3% positive) showed significant amounts of L. monocytogenes
contamination.
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