2-Title: Serogrouping and colicin-related properties of Escherichia coli isolated from neonate diarrhoeic ruminants

Authors: Ruchi Pachaury and AK Kataria

Source: Ruminant Science (2012)-1(1):9-13.

How to cite this manuscript: Pachaury Ruchi and Kataria AK (2012). Serogrouping and colicin-related properties of Escherichia coli isolated from neonate diarrhoeic ruminants. Ruminant Science 1(1):9-13.


One hundred and fifteen Escherichia coli isolates obtained from diarrhoeic faecal samples from calves (66), kids (25) and lambs (24) were subjected to serogrouping for ‘O’ antigen and to study colicin sensitivity and colicin production properties. Out of total isolates 37 were non-typeable, four were of rough type and 74 isolates were typeable belonging to 19 different serogroups. Of the 19 serogroups, six (O3, O21, O45, O65, O70 and O114) were specific to calves and three (O2, O41 and O158) to lambs whereas no specific serogroup to kids was detected.  Four (O17, O60, O76 and O152) of the serogroups were common to calves and kids, three (O22, O25 and O116) to calves and lambs, one (O55) to lambs and kids and two (O5 and O147) serogroups were common to all of the animal species in the study. Of the 115 E. coli isolates 36.53% were colicin producers and 25.21% were colicin sensitive when tested against standard strains. The study demonstrated presence of some new serogroups previously not reported from the area of study and a worldwide distribution of similar isolates among man and animals.


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