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Meat, table eggs and their products are very important in human nutrition.  Therefore, it is necessary to monitor the health status of commercial flocks  as much as the quality of poultry products in the food chain. Campylobacter  sp. and Salmonella sp. are widely distributed in nature. The influence of  these bacteria on animal health depends on the immune response. If animals  are not immunologicaly compromised, the infection is latent and clinical  symptoms are absent. Unlike animals, these bacteria cause serious diseases in  humans and the morbidity is quite high. The main transfer of infection to  humans is via poultry products. The goal of this work was to study the role  of Salmonella in artificially infected chickens onto the outcome of clinical  campylobacteriosis. It is certain that salmonella infection in poultry  damages the immune system of chickens, enabling Campylobacter to multiply and  subsequently induce a disease. Three groups of chickens were included in the  experiment. The first group received a suspension of field strain of  Campylobacter jejuni (C. jejuni) and Salmonella enterica serovar Enteritidis  (S. Enteritidis). The second group received an inoculum prepared from the  field isolate of Campylobacter jejuni and the third group received the field  isolate of Salmonella enterica serotype Enteritidis, only. In artificially  infected chickens Campylobacter and Salmonella were confirmed by isolation  and identification according to morphological, cultural and biochemical  properties. Humoral immune response of infected chickens was monitored using  the complement fixation test (CFT). In chickens infected with C. jejuni and  S. Enteritidis the clinical symptoms were recorded. The results from this  experiment show that salmonella infection damages the immune system of the  chickens enabling Campylobacter to alter the health status of the host

Influence of salmonella infection in chickens on the outcome of campylobacteriosis in experimental conditions