MI­CRO­BIOTA

The Poultry Bulletin - - FRONT PAGE - By E. Gal­braith

L Aev­er­ag­ing gut mi­crobe-host in­ter­ac­tions for per­for­mance dvances in and per­for­mance fac­tors, com­mer­cial poul­try and will ex­am­ine ap­proaches pro­duc­tion have been for im­pact­ing host-mi­crobe driv­ing in­creased in­ter­ac­tions. bird growth and pro­duc­tion ef­fi­ciency for decades, and the in­dus­try is well po­si­tioned to meet the world’s bur­geon­ing de­mand for high qual­ity pro­tein. How­ever, per­for­mance improvements must go handin-hand with con­cern for pub­lic health and food safety, an­i­mal health and wel­fare, and en­vi­ron­men­tal im­pact.

Un­der­stand­ing the role of the gas­troin­testi­nal (GI) mi­cro­biota in poul­try health and per­for­mance can help pro­duc­ers de­velop strate­gies to achieve con­sis­tent growth per­for­mance and in­creased liv­abil­ity while keep­ing broader con­sid­er­a­tions in bal­ance. We ex­plore the ef­fect of gas­troin­testi­nal mi­cro­biota on host health

Devel­op­ment of the avian gas­troin­testi­nal mi­cro­biota: the early days

Mi­cro­bial ex­po­sure dur­ing the early days of a chick’s life can have a crit­i­cal in­flu­ence on devel­op­ment of the GI mi­cro­biota and sub­se­quently on health and per­for­mance over the bird’s life­span. The GI tract pro­vides an invit­ing habi­tat for a di­verse range of in­hab­i­tants, and by day one post-hatch, bac­te­rial den­sity can rise to 108 and 1010 cells/g of di­gesta in the prox­i­mal and dis­tal in­tes­tine, re­spec­tively (Apa­jalahti et al., 2004).

Some of these micro­organ­isms sup­port health and per­for­mance of the host, while oth­ers are non-ben­e­fi­cial. Colibacil­lo­sis, caused by avian path­o­genic E. coli (APEC), con­trib­utes to ma­jor eco­nomic losses through­out the poul­try in­dus­try world­wide. Found in birds of all ages, APEC can be par­tic­u­larly prob­lem­atic in newly hatched chicks, and re­search in­di­cates that ver­ti­cal trans­mis­sion is a po­ten­tial route of in­fec­tion in young birds (Gio­va­nardi et al., 2005). Re­cent work in our lab­o­ra­tory found APEC iso­lates of sim­i­lar geno­types and vir­u­lo­types in gut sam­ples from broiler breed­ers and their prog­eny (Lam­brecht et al., 2015). In this study, E. coli was→

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