2016
DOI: 10.1590/1806-9061-2015-0216
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Evaluation of Incubation Yield, Vaccine Response, and Performance of Broilers Submitted to In-Ovo Vaccination at Different Embryonic Ages

Abstract: The aim of this study was to evaluate the effects of in-ovo vaccination on different incubation days of broiler embryos derived from young and old breeders on incubation indexes, vaccine response, and broiler performance. A number of 20,160 fertile eggs was distributed according to a completely randomized design in a 4 x 2 factorial arrangement (inovo vaccination on 16, 17, 18, or 19 days of incubation, and breeders of 31 or 52 weeks of age), totaling eight treatments with 15 replicates of 168 eggs each. Vacci… Show more

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Cited by 5 publications
(4 citation statements)
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“…One study, reported that vaccination of 10–12 day-old embryos with herpes virus of turkeys (HVT) led to pronounced lesions and embryonic deaths, while vaccination on days 16 did not cause detectable lesions [ 78 ]. Embryonic age at vaccination has also been shown to be correlated with antibody titers [ 79 ]. Maternal antibody titers actually increase after the typical age for in-ovo vaccinations and peak just after hatch [ 76 ].…”
Section: New Approaches For the Development Of Veterinary Vaccinesmentioning
confidence: 99%
“…One study, reported that vaccination of 10–12 day-old embryos with herpes virus of turkeys (HVT) led to pronounced lesions and embryonic deaths, while vaccination on days 16 did not cause detectable lesions [ 78 ]. Embryonic age at vaccination has also been shown to be correlated with antibody titers [ 79 ]. Maternal antibody titers actually increase after the typical age for in-ovo vaccinations and peak just after hatch [ 76 ].…”
Section: New Approaches For the Development Of Veterinary Vaccinesmentioning
confidence: 99%
“…It is important to have effective methods of mass vaccination because flock sizes of commercial poultry contain thousands of birds. In-ovo vaccines are a mass vaccination strategy that can reduce stressful post-hatching procedures [ 15 ]. In-ovo vaccines are currently approved for use in poultry flocks for different diseases, e.g., Marek’s disease.…”
Section: Introductionmentioning
confidence: 99%
“…Typically, the in-ovo vaccine is injected into the amniotic sac and the amnion fluid containing the vaccine antigen gets swallowed by the embryo, giving way to “oral vaccination” at an early stage [ 16 ]. In-ovo vaccination induces early immunity with less interference from maternal antibodies [ 15 ]. Early immunity can also aid in significantly reducing the inflammatory response upon future encounters with the antigen [ 17 ].…”
Section: Introductionmentioning
confidence: 99%
“…Depending on the country, producers struggle with the occurrence of different poultry diseases, for example, anemia ( CA ), Newcastle disease ( ND ), infectious bronchitis ( IB ), coccidiosis, Marek's disease ( MD ), or infectious bursal disease ( IBD , Gumboro disease) ( Awad et al, 2015 , Balarabe and Obeta, 2015 ; Getachew et al, 2015 ; Teshome and Admassu, 2015 ; Zhang et al, 2015 ). In an attempt to prevent the infections with the aforementioned pathogens, birds are protected by various vaccination programs ( de Wit et al, 2015 ; Ndegwa et al, 2015 ; Fernandes et al, 2016 ; Wegner, 2016 ; Śmialek et al, 2017 ; Colvero et al, 2018 ; Olukotun et al, 2018 ; Chung et al, 2021 ).…”
Section: Introductionmentioning
confidence: 99%