Results 21 to 30 of about 166,747 (266)

Bacterial composition of a competitive exclusion product and its correlation with product efficacy at reducing Salmonella in poultry

Frontiers in Physiology, 2023
The mature intestinal microbiome is a formidable barrier to pathogen colonization. Day-old chicks seeded with cecal contents of adult hens are resistant to colonization with Salmonella, the basis of competitive exclusion.
Margie D. Lee, Margie D. Lee, Adriana A. Pedroso, John J. Maurer, John J. Maurer   +4 more
doaj   +1 more source

Effects of Dark Brooder Rearing and Age on Hypothalamic Vasotocin and Feather Corticosterone Levels in Laying Hens

Frontiers in Veterinary Science, 2020
Chickens cannot independently thermoregulate at hatch and lack opportunity to behaviorally thermoregulate with a hen in the egg layer industry, thus barns are heated to thermoneutral temperatures.
Rebecca E. Nordquist, Rebecca E. Nordquist, Elisabeth C. Zeinstra, Alyssa Dougherty, Anja B. Riber   +4 more
doaj   +1 more source

Study of the underlying mechanisms and consequences of pathogenicity differences between two in vitro selected G1-H9N2 clones originating from a single isolate

Veterinary Research, 2019
The G1-H9N2 avian influenza virus (AIV) has caused significant economic losses in the commercial poultry industry due to reduced egg production and increased mortality.
Giang Thu Nguyen, Fabienne Rauw, Mieke Steensels, Fiona Ingrao, Francesco Bonfante, Irit Davidson, Bénédicte Lambrecht   +6 more
doaj   +1 more source

Telomere length declines with age, but relates to immune function independent of age in a wild passerine

Royal Society Open Science, 2022
Telomere length (TL) shortens with age but telomere dynamics can relate to fitness components independent of age. Immune function often relates to such fitness components and can also interact with telomeres.
Michael J. Roast, Justin R. Eastwood, Nataly Hidalgo Aranzamendi, Marie Fan, Niki Teunissen, Simon Verhulst, Anne Peters   +6 more
doaj   +1 more source

Avian amyloidosis [PDF]

Avian Pathology, 1998
Although amyloid deposits have been described for more than a century and a half, its proteinaceous and fibrillar nature was not revealed until after 1950. Biochemical characterization of amyloids has brought to light that several non-related proteins can re-organize into amyloid fibrils. In some domestic and caged wild birds, and especially waterfowl,
Landman, W.J.M., Gruys, E., Gielkens, A.L.J.   +2 more
openaire   +3 more sources

Production of monoclonal antibodies against recombinant nucleoprotein of avian influenza virus, serotype H9N2 [PDF]

Iranian Journal of Veterinary Medicine, 2018
Background: Avian influenza viruses (AIVs) including the subtype H9N2 cause considerable financial losses to poultry industries. Rapid and accurate diagnosis of avian influenza (AI) infection is important in control and eradication programs.
Masoudreza Seyfiabad Shapouri, Azadeh Yektaseresht, Masoud Ghorbanpoor Najafabadi, Amin Jaydari   +3 more
doaj   +1 more source

Avian acrobatics [PDF]

Proceedings of the National Academy of Sciences, 2013
As flying vertebrates go, hummingbirds are veritable humdingers. Featherweight members of the vertebrate subphylum, some species of hummingbirds can thrive at heights of 5,000 meters above sea level, hovering in thin air at high-altitude habitats, which pose formidable challenges to certain forms of flight. With rising altitude, the drop in atmospheric
openaire   +2 more sources

Maternal glucocorticoid levels during incubation predict breeding success, but not reproductive investment, in a free-ranging bird

Biology Open, 2020
The hormone corticosterone (CORT) has been hypothesized to be linked with fitness, but the directionality of the relationship is unclear. The ‘CORT-fitness hypothesis’ proposes that high levels of CORT arise from challenging environmental conditions ...
Devin Fischer, Robby R. Marrotte, Eunice H. Chin, Smolly Coulson, Gary Burness   +4 more
doaj   +1 more source

Avidin is evolutionarily conserved in fish but dispensable for development and resistance against Streptococcus agalactiae in zebrafish

FEBS Open Bio, EarlyView.
The presence of biotin‐binding avidin proteins in fish and their biological significance are poorly characterized. We cataloged fish avidins and demonstrate that they are widely present and evolutionarily conserved. We created avd knockout zebrafish and show that zebavidin is dispensable for development and that resistance of avd knockout embryos in ...
Anni K. Saralahti, Markus J. T. Ojanen, Mataleena Parikka, Otto Kauko, Mika Rämet, Vesa P. Hytönen   +5 more
wiley   +1 more source

Functional and structural comparison of visual lateralization in birds – similar but still different

Frontiers in Psychology, 2014
Vertebrate brains display physiological and anatomical left-right differences, which are related to hemispheric dominances for specific functions. Functional lateralizations likely rely on structural left-right differences in intra- and interhemispheric ...
Martina eManns, Felix eStröckens
doaj   +1 more source