الفهرس 
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Abstract
A field survey was conducted to monitor the prevalence of some
enteric bacterial infections incriminated in rabbit enteritis outbreaks.
Ninety bacterial isolates were recovered from diseased /or freshly dead
rabbits with a history of severe diarrhea from four farms in El-Sharkia
Province. The predominant isolates were E.coli (24.29%), klebsiella
(14%), proteus miriables (2.33%) and proteus vulgaris (1.4%). Most
bacterial isolates were highly sensitive to levofloxacin. The isolated
E.coli was later identified by using PCR.
Fifty three recently weaned White New Zealand rabbits were
experimentally used to monitor the efficacy of two herbal extracts and
probiotics (Healthy gut® and Immuplant plus®) supplementation with/or
without enrofloxacin treatment in controlling oral infection with
pathogenic streptomycin adapted E. coli in a rate of (2.5 x
1010CFU/0.1ml/ rabbit orally) and improving the growth parameters. Our
results observed that; supplementation of (Healthy gut®; Immuplant
plus®) induced an improvement in general health conditions and growth
performance parameters with a significant decrease of total E. coli counts
of infected supplemented group. In addition, this supplementation when
followed by Enrofloxacin injection after E. coli infection refluxed a
significant reduction of bacterial shedding with improvement of mean
body weight and feed conversion ratio when compared with all other
treated groups.