Dynamics of the survival of enteropathogenic and saprotrophic bacteria passing through a birds' digestive tract in their excrement and in water
2009
Koupriyanov, A. A. | Semenov, A. M. | Van Bruggen, A. H. C. | Netrusov, A. I. | Semenova, E. V.
The ability of saprotrophic bacterium Pseudomonas fluorescens 32 gfp and of two enteropathogenic bacteria Salmonella enterica var. Typhimurium MAE 110 gfp and Escherichia coli O157:H7 gfp to pass through the gastrointestinal tract (GIT) of birds (domestic chicken) and the survival dynamics of these bacteria in chicken excrement and after transmission to water have been detected. Chickens were fed with combined feed inoculated with the mentioned bacteria at a density of 107 cells/g of dry combined feed. The quantity of the surviving bacteria was assessed in chicken excrement that was subsequently used for inoculation of nonsterile and sterile pond water. Dynamics of labeled bacteria in water were also taken into consideration. Good survival rate of all investigated bacteria was demonstrated in all studied substrates. This fact points to the capability of bacterial transfer, even pathogenic for human, in nature through a number of substrates and niches during the cycle and of infection of these niches and substrates, even used as food by humans.
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