Interest in competitive exclusion approach to optimize poultry flock performance and health – invited conference presentation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027162%3A_____%2F22%3AN0000148" target="_blank" >RIV/00027162:_____/22:N0000148 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Interest in competitive exclusion approach to optimize poultry flock performance and health – invited conference presentation

Popis výsledku v původním jazyce

Gut of chicks raised in the presence of adult hens is colonised by adult type of microbiota within first week of life and colonised chicks are highly resistant to pathogen colonisation, e.g. Salmonella. Hens can be replaced by competitive exclusion products or mixed cultures of strict gut anaerobes. Both these approached increase chicken resistance to Salmonella colonisation but never to the level induced by contact with parents. This indicates that hens provide chicks not only with gut microbiota. We currently observe that skin and tracheal microbiota of chicks in a contact with adult hen is enriched for different Lactobacilli species. In addition, presence of adult hem also affects development of mucosal microbiota in the caecum. Mucosal microbiota in the caecum of chicks in a contact with adult hen is enriched for different Spirochaeta, Desulfovibrio, Mucispirillum and Helicobacter. What is their function in resistance to enteric pathogens is unknown but since these taxa are absent from common competitive exclusion products, this may explain the difference in efficacy of competitive products and presence of donor hen. Finally, we begin to realise that liver, spleen and bursa Fabricii are not free of bacterial DNA. What are biological consequences of this is not known but one of the considered hypotheses is that earlier used antibiotic growth promoters could suppress microbiota in internal tissues thus increasing chicken performance.

Název v anglickém jazyce

Interest in competitive exclusion approach to optimize poultry flock performance and health – invited conference presentation

Popis výsledku anglicky

Gut of chicks raised in the presence of adult hens is colonised by adult type of microbiota within first week of life and colonised chicks are highly resistant to pathogen colonisation, e.g. Salmonella. Hens can be replaced by competitive exclusion products or mixed cultures of strict gut anaerobes. Both these approached increase chicken resistance to Salmonella colonisation but never to the level induced by contact with parents. This indicates that hens provide chicks not only with gut microbiota. We currently observe that skin and tracheal microbiota of chicks in a contact with adult hen is enriched for different Lactobacilli species. In addition, presence of adult hem also affects development of mucosal microbiota in the caecum. Mucosal microbiota in the caecum of chicks in a contact with adult hen is enriched for different Spirochaeta, Desulfovibrio, Mucispirillum and Helicobacter. What is their function in resistance to enteric pathogens is unknown but since these taxa are absent from common competitive exclusion products, this may explain the difference in efficacy of competitive products and presence of donor hen. Finally, we begin to realise that liver, spleen and bursa Fabricii are not free of bacterial DNA. What are biological consequences of this is not known but one of the considered hypotheses is that earlier used antibiotic growth promoters could suppress microbiota in internal tissues thus increasing chicken performance.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

40301 - Veterinary science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů