Publikationsdatenbank

Strain-dependent reduction of broiler bolonisation with ESBL-/ AmpC- producing E. coli using an alternative hygiene- and management measures (2019)

Art

Vortrag

Autoren

Robé, Caroline (WE 10)

Daehre, Katrin (WE 10)

Fiedler, Sophie

Ewers, Christa

Guenther, Sebastian

Roesler, Uwe (WE 10)

Kongress

XIX International Congress on Animal Hygiene 2019

Wrocław, Poland, 10. – 12.09.2019

Quelle

Proceedings of the XIXth International Congress of the International Society for Animal Hygiene : Animal hygiene as a fundament of one health and welfare improving biosecurity, environment and food quality — International Society for Animal Hygiene (Hrsg.)

Wrocław, Poland: University of Environmental and Life Sciences, 2019 — S. 90

Sprache

Englisch

Verweise

URL (Volltext): https://www.isah-soc.org/?Events/Congresses/2019-Poland

Kontakt

Institut für Tier- und Umwelthygiene

Robert-von-Ostertag-Str. 7-13
14169 Berlin
+49 30 838 51845
tierhygiene@vetmed.fu-berlin.de

Abstract / Zusammenfassung

The colonisation of broilers with ESBL- and AmpC- producing Enterobacteriaceae is well-known and close contact to broiler flocks or through contaminated retail meat could lead to the transfer to humans. We used a recently established broiler colonisation model to investigate potential intervention strategies regarding hygiene- and management measures to reduce the colonisation of broilers with these resistant bacteria.
Groups of 90 broilers were housed in conventionally (39 kg/sqm, no enrichment, food and water ad libitum), alternating one measure each. Alternative parameters included the acidification of water, usage of an alternative breed, the reduction of stocking density to 25 kg/sqm, an increased amount of litter and the application of a Competitive Exclusion (CE-) culture of one defined non-pathogenic bacterial strain. One fifth of the ESBL-/ AmpC- negative day- old
broilers were orally co-infected on their third day of life (seeders) with 102 cfu of one ESBL- and one AmpC- producing E. coli strain. Colonisation success of all infected broilers (seeder, n=18) and non- infected broilers (sentinel, n=28) was proven by cloacal swabs over the period of the trial and a final necropsy at a target weight of two kilograms.
Statistical analysis reveals a strain- dependent reduction of colonisation for the ESBL- producing E. coli strain concerning the reduction of stocking density and the application of a CE- culture. In contrast to this, water acidification seems to increase the colonisation with both bacterial strains.
Apparently, none of the tested parameters led to a reduction of colonisation with both bacterial strains. To reduce the spread of ESBL- and AmpC- producing Enterobacteriaceae in conventional chicken fattening farms more targeting measures, directly addressing the gut, seem to be more meaningful approaches.