Lactobacilli as probiotics for poultry

Lactobacilli are generally accepted as beneficial microbes. Despite this, in our hands, lactobacilli do not permanently colonise chicken intestinal tract and do not protect chickens against Salmonella Enteritidis challenge. We have repeatedly shown that if lactobacilli and Salmonella meet each other for the first time as late as in the chicken crop, lactobacilli administration does not lead to protection of chickens against Salmonella. However, if lactobacilli and Salmonella are simultaneouysly inoculated to chicken feed and conditions are set so that fermentation may proceed, metabolic activity of lactobacilli leads to decrease in pH and suppression of Salmonella viability. The most common and frequent probiotic effect of lactobacilli as probiotics is therefore expressed as fermentation and decrease in pH what results in suppression of other microbiota viability including pathogens like Salmonella. For more details, see HERE.

Influence of lincomycin-spectinomycin treatment on the outcome of Enterococcus cecorum infection and on the cecal microbiota in broilers

Enterococcus cecorum (EC) is one of the main reasons for skeletal disease in meat type chickens. Intervention strategies are still rare and focus mainly on early antibiotic treatment of the disease, although there are no data available concerning the effectivity of this procedure. The present study aimed to investigate the efficacy of early lincomycin-spectinomycin treatment during the first week of life after EC-infection. Furthermore, the impact of lincomycin-spectinomycin treatment and EC infection on the development of cecal microbiota was investigated. For more information, see here.

Ecological adaptations and consequences for selection of novel types of probiotics

In this review we reminded characteristics of chicken gut anaerobes and related them to the probiotic potential of individual gut microbiota members. By comparison of already published data we proposed  that bacterial species from the intestinal tract which exhibit any form of adaptation to aerobic environment (spore forming bacteria, aerotollerant or facultative anaerobes) are less efficient in the colonisation of chicken intestinal tract and are therefore less suitable as probiotics intended for a single dose administration.



Novel probiotic products are tested under field conditions

After extended testing under laboratory conditions and contained environment of experimental animal houses we moved towards verification of probiotic efficacy under real field conditions. Key for the success is the administration of strictly anaerobic cultures. This is why we test different approaches like administration via drinking water, fermented feer or spraying in hatcharies.