Development of the gastrointestinal tract microflora in young carrier pigeons

The high demands placed on the performance of carrier pigeons are often reflected in their health and reduced immunity. Therefore, it is important to take sufficient care of their health from the hatching throughout the rearing of future competitors. The aim of the study was to monitor the development of the bacterial microbiota of the gastrointestinal tract (GIT) during the first month of their life. Two examinations of young pigeons involved taking of swabs from crop and cloaca at 5^th day after hatching and 30^th day of weaning, when exposure of young pigeons to stress was expected. The results of the study suggested that crop microbiota of young pigeons until weaning is dominated by lactobacilli, such as L. fermentum, L. mucosae or L. agilis, and host-specific bacteria, namely enterococci and streptococci. From the cloacal swabs, E. coli, Ent. faecalis and Str. faecalis were most frequently detected during the two samplings. Commensal bacteria, particularly Str. gallolyticus and Str. sanguinis, which are part of the gastrointestinal microbiota, can act as opportunistic pathogens, mainly under stress conditions resulting in susceptibility to various diseases.