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Ana Villegas (University of Georgia) shared the results of this study on crude protein concentration in the diet under challenge conditions, during the 8th Symposium on Gut Health in Production of Food Animals in St. Louis, USA.
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Dear Dr. Emad:
Your comment is very true. In Salmonella there are many serotypes (around 40 are important as pathogens) and even among serotypes there are different strains with different degrees of pathogenicity. Furthermore in vivo passages increase pathogenicity and in vitro ones decrease.
In laying hens S. Enteritis and in second place S. Typhimurium are the most important because of their hi ...
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