Short communication: Effects of breeder age and pre‐placement feed on IgY concentration in egg yolk and chick serum

Abstract

Breeder age and pre‐placement feed are factors that can affect broiler performance during grow out. This study evaluated the effects of breeder age (29 and 55 weeks old) on IgY transference to egg yolk in addition to the effects of breeder age (29 and 55 weeks old) and pre‐placement feed (with or without), in a factorial arrangement, on IgY concentration in chick serum. Forty‐eight eggs were collected from a breeder flock and considered the experimental units. Eighteen chicks from each breeder age were randomly selected to determine IgY at pulling. After 48 h of placement, old breeders had greater egg weight and yolk weight (p ≤ 0.05) than the young ones. Breeder age (p > 0.05) had no effect on IgY concentration of egg yolk. Breeder age (p > 0.05) had no effect on IgY concentration of chick serum at pulling. There was no interaction (p > 0.05) between breeder age and pre‐placement feed for IgY concentration of chick serum at housing. There was also no effect of breeder age or pre‐placement feed during placement time (48 h) on IgY concentration of chick serum at housing (p > 0.05). In conclusion, 48 h of fasting had no effect on IgY concentration in chick serum despite breeder age. It appears that the immunoglobulins from the residual yolk sac are not used as a protein source during the period between hatching and housing.

Imunidade Materna Do Frango Nas Artrites Causadas Por Reovírus

“…Estudos apontaram que pintos de matrizes mais novas aparentam menor altura de vilosidade e maior profundidade de cripta nas regiões do duodeno e do jejuno, indicando menor capacidade absortiva intestinal destas aves (FERNANDES et al, 2014;LEANDRO et al, 2017). Isso pode estar atrelado ao fato de que é através da gema que o pintinho recebe nutrientes durante as primeiras semanas após a eclosão, por meio do pedúnculo da gema que conecta o saco vitelino a região do jejuno do embrião, representando a primeira experiência digestiva das aves com a diferenciação dos enterócitos ( VAN DER WAGT et al, A quantidade de albúmen e gema nos ovos proveniente de matrizes mais jovens é menor quando comparado aos ovos produzidos por fêmeas mais velhas (ULMER-FRANCO et al, 2012), consequentemente pintinhos provenientes de ovos de matrizes mais velhas apresentam maior desenvolvimento intestinal, portanto maior será a absorção de nutrientes ingeridos (CARDEAL et al, 2021).…”

“…Vários estudos demonstram que a idade das matrizes possui influência sobre muitos aspectos, como peso do ovo, peso e qualidade do pintinho, proporção dos seus constituintes, peso da gema, desenvolvimento intestinal e, inclusive na concentração de imunoglobulinas na gema, porém ainda são poucos os estudos acerca da influência da idade da matriz na imunidade conferida a progênie (ARAÚJO et al, 2016; VAN DER WAGT et al, 2020;CARDEAL et al, 2021).…”

Effects of broiler breeder age on immune system development of progeny

“…At pulling, one chick per repetition, for a total of 30 birds per treatment, was weighted, and 2.0 mL of blood were collected in blood collection tubes without anticoagulant by cardiac puncture. The chicks were then euthanized by cervical dislocation (Cardeal et al, 2022). Individual weights of liver, gizzard + proventriculus, pancreas, bursa of Fabricius, spleen, and yolk sac were obtained using a precision scale (0.0001 g); after that, relative organ weight (%) was calculated (Araújo et al, 2020).…”

“…The ocular route was used for application to ensure that all birds would receive the vaccine dose in the ideal concentration. Blood samples were subsequently collected from the chicks at 21, 28, and 35 days of age to quantify serum IgY (Cardeal et al, 2022).…”

“…Chicks from older breeders have higher body weight and develop faster due to the greater availability of nutrients in the egg (Nangsuay et al, 2016;Araújo et al, 2016). According to Machado et al (2020) and Cardeal et al (2022), chicks from eggs of older breeders have greater intestinal development. In addition, breeder age is positively correlated with newly-hatched chick, yolk sac, and bursa of Fabricius weight (Fernandes et al, 2014;Narinç and Aydemir, 2021).…”