Transfer of lactic acid bacterial strains from the feed to the sow, the environment, and the piglets

Pedersen, K.; Christensen, G.W.; Steffensen, M.; Schyum, P.; Johansen, A.K.

Acta Veterinaria Scandinavica 33(4): 297-303


ISSN/ISBN: 0044-605X
PMID: 1488945
Accession: 002534684

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The spread of lactic acid bacterial strains to the environment and to newborn piglets was investigated after feeding such strains to sows. Rifampicin-resistant bacterial strains (lactobacilli or Enterococcus faecium) were fed to sows at 1010 c.f.u. per day, during the period from 1 week before expected farrowing until 1 week after farrowing. Faecal samples from the sows and samples of bedding were collected for bacteriological examination together with swabs from the pens, the skin of the sows, and from the rectum of the piglets. The test strains were excreted in only relatively low amounts in the faeces of the sows (approx. 10superscript 3 - 106 c.f.u. per gram). They were not able to displace the normal lactic acid bacterial flora in the sows nor were they transmitted to the intestinal tract of the piglets to any significant extent. After the last administration the test strains disappeared from faeces, skin, and the environment, indicating that no permanent colonization had taken place, although considerable differences in duration of persistence were noticed between test strains.