الفهرس 
AbstractOnly 14 pages are availabe for public view
 |  | from | 167 |  |  |
| | | from | 167 | | |
Abstract
E. coli is one of the bacterial pathogens that plays an essential role in inducing diarrhoea in newborn calves.
Synergestic role was found between adhesion and toxin producing strains. This was indicated by the high percentage of E. coli K99+ve which produced enterotoxin.
HA activity showed high incidence when using the RBCs of the same species of diarrhoiec calves.
CR test may be used as a phenotypic marker or virulence factor of E. coli isolates.
Cultures that CR+ve and negative in other virulence factors need further studies to clarify this point.
It is tempting to suspect that E. coli virulence may play a significant but not a whole part in the pathogenesis of diarrhoeal diseases.