Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/91825
Citations
Scopus Web of Science® Altmetric
?
?
Full metadata record
DC FieldValueLanguage
dc.contributor.authorSamiullahen
dc.contributor.authorRoberts, J.en
dc.contributor.authorChousalkar, K.en
dc.date.issued2014en
dc.identifier.citationJournal of Applied Poultry Research, 2014; 23(1):59-70en
dc.identifier.issn1056-6171en
dc.identifier.issn1537-0437en
dc.identifier.urihttp://hdl.handle.net/2440/91825-
dc.description.abstractThe shell of the egg is essential in providing shape to the egg and ensuring safe packaging of the internal contents; however, shell defects have been shown to increase the risk of microbial contamination of eggs. Eggs were collected from commercial cage and free-range flocks at the ages of 25, 35, 45, 55, 65, and 75 wk. From each collection per flock, 30 eggs were processed for the eggshell and egg internal quality determination, 30 eggs for cuticle estimation, 30 eggs for mammillary layer ultrastructural features scoring, and 60 eggs for egg microbial enumeration. Translucency score and shell reflectivity were significantly higher in free-range eggs and increased with flock age in both production systems. Egg weight, shell weight, percentage shell, shell thickness, albumen height, Haugh unit, and yolk color were higher for cage eggs. The amount of cuticle was higher in cage eggs and fluctuated with flock age in both production systems. For the mammillary layer ultrastructural variables, a significant effect of production system and flock age was observed for early fusion, Type A bodies, and Type B bodies, whereas aragonite, depression, erosion, and hole were rarely observed. Variability of mammillary cap size, the incidence of poor mammillary cap quality, incidence of late fusion, alignment, Type A bodies, Type B bodies, and cubic cone formation were greater in the free-range versus cage system and increased with flock age in both production systems. The incidence of confluence and early fusion were greater in cage eggs and decreased with age in both production systems. Significantly lower total microbial load was observed for cage compared with free-range eggs, but the overall bacterial load recorded in this study was low. It can be concluded that cage eggs were better in overall quality when directly compared with free-range eggs.en
dc.description.statementofresponsibilitySamiullah, J. R. Roberts, and K. K. Chousalkaren
dc.language.isoenen
dc.publisherOxford University Press (OUP)en
dc.rights©2014 Poultry Science Association Inc.en
dc.subjectconventional cage; free range; cuticle; shell mammillary layer; bacterial load; Enterobacteriaceaeen
dc.titleEffect of production system and flock age on egg quality and total bacterial load in commercial laying hensen
dc.typeJournal articleen
dc.identifier.rmid0030012985en
dc.identifier.doi10.3382/japr.2013-00805en
dc.identifier.pubid98482-
pubs.library.collectionAnimal and Veterinary Sciences publicationsen
pubs.library.teamDS03en
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
Appears in Collections:Animal and Veterinary Sciences publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.