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THE EFFECT OF FEEDING COLICINOGENIC ESCHERICHIA COLI ON THE INTESTINAL E. COLI OF EARLY WEANED PIGS
Author(s) -
TADD A. D.,
HURST A.
Publication year - 1961
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1961.tb00256.x
Subject(s) - feces , escherichia coli , biology , weaning , herd , microbiology and biotechnology , vtec , antibiotics , zoology , serotype , veterinary medicine , medicine , biochemistry , gene
SUMMARY The Escherichia coli contents of samples of faeces from 24 early weaned pigs were estimated qualitatively and quantitatively in two experiments. At weaning (10 days of age) the E. coli content was about 10 8 /g of faeces. Haemolytic E. coli , often pathogenic serotypes, emerged at 12–20 days of age and then tended to disappear at 30–40 days of age. Colicinogenic E. coli , isolated from the faeces of pigs from another herd, were grown in a 50 1. batch fermenter and added to the diet of the early weaned pigs, from weaning and until the pigs were 40 days old. Within a few days of feeding the colicinogenic E. coli , colicinogenic types formed 20–50% of the coli‐aerogenes flora of the faeces. The feeding and establishment of colicinogenic E. coli did not suppress the haemolytic E. coli and did not affect the incidence of mortality among the pigs.