title: Prevalence of Salmonella in flocks housed in enriched cages.
abstract: Salmonellosis is a foodborne disease of humans and animals caused by infection with Salmonella. The aim of this paper is to improve a deterministic model (DM) and an individual-based model (IBM) with reference to Salmonella propagation in flocks of laying hens taking into account variations in hens housed in the same cage and to compare both models. The spatio-temporal evolution, the basic reproduction number, R 0, and the speed of wave propagation were computed for both models. While in most cases the DM allows summary of all the features of the model in the formula for computation of R 0, slight differences between individuals or groups may be observed with the IBM that could not be expected from the DM, especially when initial environmental contamination is very low and some cages may get rid of bacteria. Both models suggest that the cage size plays a role on the risk and speed of propagation of the bacteria, which should be considered when designing new breeding systems.
authors.affiliation: CEREGMIA, Université des Antilles et de la Guyane,Cayenne, Guyane Francaise.
authors.forename: P
authors.initials: P
authors.lastname: Zongo
authors.affiliation: UMR CNRS 5251 IMB,Université de Bordeaux,Bordeaux,France.
authors.forename: A
authors.initials: A
authors.lastname: Ducrot
authors.affiliation: UMR CNRS 5251 IMB,Université de Bordeaux,Bordeaux,France.
authors.forename: J-B
authors.initials: JB
authors.lastname: Burie
authors.affiliation: INRA,UR83 Recherches avicoles, Nouzilly,France.
authors.forename: C
authors.initials: C
authors.lastname: Beaumont
mesh_terms: D000818:Animals; D002645:Chickens / Q000382:microbiology*; D005260:Female; D006799:Housing, Animal; D015233:Models, Statistical; D011201:Poultry Diseases / Q000453:epidemiology* / Q000382:microbiology / Q000635:transmission; D015995:Prevalence; D012481:Salmonella Infections, Animal / Q000453:epidemiology* / Q000635:transmission
keywords: individual-based model
references.citation: Avian Dis. 1997 Apr-Jun;41(2):296-303
references.pmid: 9201391
references.citation: Poult Sci. 1993 Feb;72(2):267-74
references.pmid: 8441730
references.citation: J Math Biol. 1990;28(4):365-82
references.pmid: 2117040
references.citation: Vet Res. 2008 Mar-Apr;39(2):20
references.pmid: 18258173
references.citation: Avian Dis. 1990 Apr-Jun;34(2):438-46
references.pmid: 2196046
references.citation: J Theor Biol. 2010 Dec 21;267(4):595-604
references.pmid: 20883702
references.citation: Epidemiol Infect. 1988 Feb;100(1):43-9
references.pmid: 3338506
references.citation: Appl Environ Microbiol. 2009 Oct;75(19):6361-6
references.pmid: 19666725
references.citation: Avian Dis. 1994 Apr-Jun;38(2):282-8
references.pmid: 7980276
references.citation: J Theor Biol. 2006 Oct 7;242(3):755-63
references.pmid: 16780891
references.citation: Am J Vet Res. 1996 Apr;57(4):489-95
references.pmid: 8712512