In-ovo Injection Research Articles

In-ovo injection of Bacillus subtilis, raffinose, and their combinations enhances hatchability, gut health, nutrient transport- and intestinal function-related genes, and early development of broiler chicks

An experiment was conducted to assess the response of chicks to in-ovo injection of Bacillus subtilis (probiotic), raffinose (prebiotic), and their combinations. The study used 1,500 embryonated eggs allotted to 10 groups/ 6 replicates (150 eggs/group). The experimental treatments were: 1) un-injected control (NC); 2) sham (sterile distilled water) (PC); 3) probiotic 4 × 105CFU/egg (LBS); 4) probiotic 4 × 106CFU/egg (HBS); 5) prebiotic 2 mg/egg (LR); (6 prebiotic 3 mg/egg (HR); 7) probiotic 4 × 105CFU + prebiotic 2 mg/egg (LBS+LR); 8) probiotic 4 × 105CFU + prebiotic 3 mg/egg (LBS+HR); 9) probiotic 4 × 106CFU + prebiotic 2 mg/egg (HBS+LR); and 10) probiotic 4 × 106CFU + prebiotic 3 mg/egg (HBS+HR). Results showed that in-ovo inclusion of Bacillus subtilis, prebiotic, and their combinations improved hatchability, yolk-free chick weight, and chick weight compared to the control group. Moreover, the in-ovo treatment reduced residual yolk weight on the day of hatch compared to the control group. Different levels of in-ovo B. subtilis alone or combined with raffinose significantly (P ≤ 0.001) reduced total bacterial count and total yeast and mold count compared to the negative control group. Total coliform and E. coli decreased significantly (P ≤ 0.001) in groups treated with probiotics, prebiotics, and synbiotics with different doses during incubation compared to those in the control. Clostridium spp. was not detected in the groups injected with B. subtilis alone or combined with raffinose. In-ovo probiotics and synbiotics (LBS+LR & LBS+HR) significantly (P ≤ 0.001) increased ileal villus length compared to other groups. In-ovo treatment increased mRNA expression of JAM-2 compared to the control group. The fold change significantly increased in group LBS+HR for genes MUC-2, OCLN, VEGF, SGLT-1, and EAAT-3 compared to the negative control. In conclusion, in-ovo injection of a low dose of B. subtilis plus a high or low dose of raffinose can positively affect hatching traits, cecal microbial populations, intestinal histomorphometry, nutrient transport- and intestinal function-related genes, and chick quality of newly hatched broiler chicks.

Influences of In-Ovo Injection of L-Carnitine on the Hatchability and Immunity of Hatched Chicks of Two Breeds of Broiler Chickens

Influences of In-Ovo Injection of L-Carnitine on the Hatchability and Immunity of Hatched Chicks of Two Breeds of Broiler Chickens

Effect of in-ovo inoculation of betaine on hatchability, serum antioxidant levels, muscle gene expression and intestinal development of broiler chicks.

This study investigated the effects of in-ovo inoculation of betaine on hatchability, hatching weight, and intestinal development, as well as serum and expression levels of some antioxidants in the posthatched chicks. A total of 350 fertile eggs of Hubbard efficiency plus breeder's flock were incubated at normal incubation temperature (37.5°C) and randomly assembled into 3 groups with 4 replicates, and 25 eggs per each. The experimental groups were allocated as noninjected control group (CN), diluent-injected group (CP, 0.1 mL saline), and betaine-injected group (B, 2.5 mg in 0.1 mL saline). The injections were performed in the air cells of the eggs on the 12th day of the embryonic phase. Hatchability percentage, hatching weight, serum-reduced glutathione (GSH), and superoxide dismutase (SOD) were estimated in 7-day-old chicks. Moreover, expression levels of the nuclear factor erythroid 2-related factor 2 (Nrf2) and SOD were determined in the breast skeletal muscles of chicks. Jejunum histo-morphometric analysis was assessed with computerised morphometric measurements. The results revealed that the hatchability percentage was not influenced by in-ovo injection of betaine or vehicle while betaine significantly increased the hatchling's weight of chicks. Moreover, there were a significant increase in SOD and Nrf2 mRNA expression levels. In-ovo injection of betaine significantly induced positive effects on intestinal morphometry by ameliorating the jejunal villus length, the ratio of villus height to villus width, and absorptive surface area.

In-Ovo Glutamine Administration Enhances Intestinal Development and Functions in Broiler Chickens: Insights from Enteroid Models

BackgroundEarly life events play significant roles in tissue development and animal health in their later life. Early nutrition, through in-ovo delivery, has shown beneficial effects on improving intestinal health in broiler chickens. However, the underlying mechanism is not fully investigated. A recently developed enteroid culture technique allows investigations on intestinal epithelial functions that are close to physiologic conditions. ObjectivesIn this study, we evaluated the short- and long-term effects of in-ovo administration of glutamine (Gln) on intestinal epithelial development and functions by using intestinal enteroid culture and tissue electrophysiologic analysis. MethodsA hundred eggs of commercial Cobb500 broilers were in-ovo injected with 0.2 mL of either phosphate-buffered saline (PBS) or 3% Gln at embryonic day 18 (E18). Chicks were killed on the day of hatch, and at 3- and 14-d posthatch. Enteroids were generated from the small intestine. After 4 d of culture, enteroids were harvested for 5-ethynyl-2′-deoxyuridine proliferation, fluorescein isothiocyanate-4 kDa dextran permeability, and glucose absorption assays. At day 3 (d3) and day 14 (d14), intestinal barrier and nutrient transport functions were measured by the Ussing chamber. The gene expression of epithelial cell markers, nutrient transporters, and tight-junction proteins were analyzed in both intestinal tissues and enteroids. ResultsIn comparison with the PBS control group, in-ovo Gln increased intestinal villus morphology, epithelial cell proliferation, and differentiation, and altered epithelial cell population toward increased number of enteroendocrine and goblet cells while decreasing Paneth cells. Enteroids gene expression of nutrient transporters (B0AT1, SGLT1, and EAAT3), tight junction (ZO2), glucose absorption, and barrier functions were enhanced on the day of hatch. Long-term increases of intestinal di-peptide and alanine transport were observed at day 14 posthatch. ConclusionsTogether our results suggested that the in-ovo injection of Gln stimulated intestinal epithelium proliferation and programmed the epithelial cell differentiation toward absorptive cells.

Effects of in ovo injection of the L-carnosine on physiological indexes of neonatal broiler chicken

The objective of the present investigation was to ascertain the impact of in ovo administration of L-carnosine on physiological indicators in neonatal broiler chickens. A total of 280 viable broiler eggs were allocated to 7 distinct groups: control, Sham in ovo injection of sterile water on d 7 of incubation. Groups 3 and 4 were subjected to in ovo injections of L-carnosine (25 and 50 µg) on d 7 of incubation. Group 5, functioning as a sham in ovo, received an injection of sterile water on d 18 of incubation. Groups 6 and 7 were in ovo injected with L-carnosine (25 and 50 µg) on d 18 of incubation. All eggs were subjected to incubation, and the hatching rate and body weight were measured post-hatch. Subsequently, blood samples were collected, and the levels of biochemical constituents in the serum were determined. Based on the outcomes, the administration of L-carnosine (50 µg) on d 7 of incubation led to a significant increase in post-hatch body weight compared to the control group (P < 0.05). The in ovo injection of L-carnosine (25 and 50 µg) on d 7 and 18 of incubation resulted in a significant decrease in the levels of serum glucose, triglyceride (TG), low-density lipoprotein (LDL), phosphorus (P), alkaline phosphatase (ALP), aspartate aminotransferase (AST), and alanine transaminase (ALT) in the newly hatched chickens (P < 0.05). Furthermore, the in-ovo injection of L-carnosine (25 and 50 µg) on d 7 and 18 of incubation led to a significant increase in the levels of serum high-density lipoprotein (HDL), calcium, and total protein (TP) in the newly hatched chickens (P < 0.05). Nonetheless, L-carnosine did not have a significant effect on the levels of serum IgY and IgA in the newly hatched chickens (P > 0.05). These findings indicate that the in ovo administration of L-carnosine yielded favorable outcomes in neonatal broiler chickens.

Effects of In-Ovo Glucose and Glutamine Treatment on Hatching Efficiency, Intestinal Histomorphology and Gene Expression of Digestive Enzymes in Broiler Chicks

The purpose of the present study was to identify the effects of in-ovo injection of glucose and glutamine on hatching efficiency, hatching weight, liver and residual yolk weights, intestinal histomorphology and gene expressions of digestive enzymes. On the 17th day of incubation, NaCl (0.9 %), glutamine (0.5 ml 10%), glucose (0.5 ml 0.25 g/ml), and glutamine+glucose (0.25 ml 10%+0.25 ml 0.25 g/ml) were injected into the amniotic sac. In-ovo injection of glucose, glutamine and glucose+glutamine significantly decreased hatching efficiency in glucose and glutamin+glucose groups (p&lt;0.001). This treatment did not affect hatching weight, liver and residual yolk weight in any of the groups. When the intestinal histomorphology was evaluated, in-ovo injection was found to increase the villi height/crypt depth ratio, villus width and the number of goblet cells in the jejunum; whereas villi height, crypt depth, and tunica muscularis thickness were not significantly affected by the treatments. Moreover, the ileum histomorphology in general appear not to be affected by any of the treatments as well. In-ovo glutamine injection significantly increased Suc-Iso and mTOR gene expressions (p≤0.05) compared to the control group, whereas SGLT1 gene expression was statistically indifferent. At the end of the study, while in-ovo glucose and glutamine injection had an overall negative effect on the hatching efficiency in broiler chicks.

In-Ovo injection of melittin into Alexandria chicken eggs: a way for early immune acceleration

This study intended to assess the properties of in-ovo administration of Melittin (MLT) on hatchability, chick yield, hematology, immunological indices and relative organs weight of Alexandria chickens at hatch. A total of 600 eggs with an average weight of (45.12 g), were gathered and split into five groups: a non-injected group or negative control (NC), a saline injection group or positive control (PC), and three concentrations of MLT (5, 10 and 15 µg of MLT per egg, respectively). On day 18 of incubation, eggs from the injection groups were injected into the amniotic fluid from the large end with the in-ovo injection solutions (0.2 ml per egg). Results indicated that 10 µg MLT/egg positively affected the weight and yield of chicks. In addition, our findings indicated that the in-ovo administration with 10 or 15 µg MLT/egg was superior in most of the immunological indicators (spleen and bursa relative weights, immunoglobulins IgG and IgM, T cells and B cells). In conclusion, in order to improve the immune efficiency (early immune acceleration) of Alexandria chicks, which may contribute to offering a significant boost to their future performance, this study suggests injecting eggs with 5 or 10 µg MLT/egg.

Characterizing the impact of Enterococcus cecorum infection during late embryogenesis on disease progression, cecal microbiome composition, and early performance in broiler chickens

Enterococcus cecorum (EC) has been associated with septicemia and early mortality in broiler chickens. There is limited research investigating the pathogenicity of EC field strains obtained from affected birds. The purpose of this study was to evaluate the effect of in-ovo administration into the amnion with different EC field isolates at d 18 of embryogenesis (DOE18). In Exp 1, 7 EC field isolates alone or in combination (EC1-EC3, EC4-EC5, EC6, and EC7) were selected based on phenotypic characteristics and evaluated at different concentrations (1×102, 1×104, and 1×106 CFU/200 µL/embryo) to assess the impact on early performance and macroscopic lesions. Three isolates (n=3; EC2, EC5, EC7) were selected for additional evaluation based on the significant (P < 0.05) BWG reduction (d 0-21) compared to the negative control (NC) and the presence of macroscopic lesions observed during posting sessions at d 14 and d 21. An additional isolate associated with enterococcal spondylitis was included in Exp 2 (EC11B). Treatment groups for Exp 2 include: 1) NC, 2) EC2, 3) EC5, 4) EC7, and 5) EC11B (n=90-120/embryos/group). Groups 2 to 5 were challenged at 1×102 CFU/200 µL/embryo by in-ovo injection into the amnion at DOE18. Chicks were placed in battery cages for the duration of the study (21 d), and pen weights were recorded at d 0, d 7, d 14, and d 21 to calculate average BW and BWG. At d 14 and d 21 posthatch, liver, spleen, free thoracic vertebrae (FTV), and femoral head (FH) were aseptically collected to enumerate Enterococcus spp. using Chromagar Orientation as the selective media. Cecal contents were collected at d 21 to evaluate the effect of EC challenge on the cecal microbiome composition. There was a significant (P < 0.05) reduction in BW at d 21, and BWG from d 14 to 21 and d 0 to 21, for EC7 and EC11B. Enterococcus cecorum was recovered from the FTV of all challenged groups at d 14 and d 21. The most representative lesions were pericarditis, hydropericardium, focal heart necrosis, and FH osteomyelitis. However, lesions were not uniform across challenged groups or ages (d 14 and d 21). Alpha diversity of the cecal contents was markedly lower in EC5 and EC11B compared to all treatment groups suggesting that EC exposure during late embryogenesis affect the cecal microbiome up to 21 d posthatch. Additionally, these results highlight the differences in pathogenicity of EC strains isolated from field cases and suggest that hatchery exposure to EC during late embryogenesis is a potential route of introduction into a flock.

Effects of In-Ovo Injection of sialic acid on Chick's embryonic development and physiological traits

This study was conducted at the College of Agriculture – University of Anbar, Iraq. From 16 January to 5 February 2022, this study aimed to investigate the effect of injected egg hatching at different sialic acid times in growth and embryonic development. Four hundred eggs of hatching types (Ross 308) were injected with different sialic acid concentrations at 0 days (before placing in the incubator), 7 and 14 days of incubation. Eggs were divided into four groups (100 eggs each) as follows: T1: The control group was placed in the incubator without injection. T2: Injected with a dose of 100 μg sialic acid at the age of zero. T3: Injected with 100 μg sialic acid dose at 7 days. T4: Injected with 100 μg sialic acid dose at 14 days of incubation. Statistical analysis was performed (CRD) (P=0.05); results show: Increase in the e length of the embryo, the diameter of the vascular region and the number of pairs of somites at 3 days of incubation for T1. Increase in the percentage of embryonic weight, decrease in the percentage of Albumin and the percentage of shell at 7 days of incubation for T2 and T3. Increase in percentage of embryonic weight and amniotic sac and liquid, decrease in the percentage of Albumin and yolk, at 14 days of include sialic acid for T2. Increase the percentage of embryonic weight, and decrease the percentage of yolk at 14 days incubation for T2. They have concluded that In-Ovo injection of the hatching eggs with sialic acid contributed to increased physiological traits and embryonic development. Keywords: In-Ovo, Sialic Acid, Erythropoietin, Oxygen, Anemia, and Anoxia.

Embryo Development and Chick Performance of Local Chicken Following In-Ovo Injection of L-Arginine Into Local Chicken Eggs

This study aims to determine the effect of in-ovo injection of L-arginine into local chicken eggs on embryo development and chick performance of local chicken. A total of 160 eggs were incubated using semi-automatic incubator with temperature of 37-38C and relative humidity of 55-65%. The injected L-arginine solution has a concentration of 0.5% (m/v). In treatment was divided into 4 groups, the first treatment was without injection (control), the second treatment was the injection of 0.2 mL L-arginine solution 0.5% (m/v)/egg, the third treatment was the injection of 0.4 mL L-arginine solution. 0.5% (m/v)/egg, and fourth treatment was the injection of L-arginine solution 0.6 mL 0.5%(m/v)/egg. The results showed that embryo mortality and hatchability were lower with L-arginine injection treatment than without injection. All treatments showed no effect on extraembryonic fluid absorption, but there was an increase in embryo weight in the injection treatment 0.2, 0.4, 0.6 mL L-Arginine 0.5% /eggs 2,355 g, 2,577 g, 2,705, respectively. In conclusion, an in-ovo injection of L-arginine in local chicken eggs has a good effect (the beneficial effect) on embryo death and embryo performance. Injection of 0.4 ml L-Arginine 0.5% /eggs improved hatchability and Newly Hatched Chick Weight (NHCW).

The Effect of Vitamin C in-ovo Injection on Incubation Results of Fertile Goose Eggs

The aim of the research is to determine the effect of vitamin C (Ascorbic acid) injected at different doses on the hatchability of eggs obtained from domestic geese raised in the Afyonkarahisar region. Injected doses of vitamin C, 8 and 10 mg were applied to the air cell of the eggs on the 24th day of incubation. As a result of the experiment, vitamin C given to fertile goose eggs positively affected hatch weight, chick length, and chick quality. There was no significant difference between the groups regarding hatchability and survival rate.

تأثير الحقن والمعاملة بعد الفقس بالسيلينيوم غير العضوي في الأداء الإنتاجي وبعض الهرمونات وحالة مضادات الأكسدة لفروج اللحم

The current study aimed to evaluate the effects of inorganic selenium (sodium selenite) added to the drinking water of hatched chicks from eggs injected with it on productive performance, antioxidant status, and some hormonal parameters. 216 unsexed one-day-old broiler chicks were distributed into 6 groups (3 replicates, 12 birds/replicate) till 42 days of age, as follows: The first (1st) and second (2nd) groups: hatched chicks came from non-injected eggs without any substance. The third (3rd) and fourth (4th) groups: hatched chicks came from eggs injected with deionized water (0.2 ml/egg) in the chorioallantoic sac, while the fifth (5th) and sixth (6th) groups: hatched chicks came from eggs injected with 0.02 mg sodium selenite/egg in the chorioallantoic sac. Chicks of the 1st, 3rd, and 5th groups were given tap water, while chicks of the other groups were given drinking water supplemented with 0.3 mg sodium selenite/L. Inorganic selenium significantly improved the initial and final body weight, weight gain, feed conversion ratio, and significantly reduced the feed consumption at 35 and 42 days of age. It also enhanced vitality percentage, productive index, and reduced mortality percentage, and it was significant (P≤0.05) at 42 days of age. On the other hand, in-ovo injection with sodium selenite reduced malondialdehyde and corticosterone values, while total antioxidant capacity and leptin increased, and continuing adding it with drinking water led to a significant decrease in malondialdehyde while leptin and thyroxine values significantly increased. In conclusion, the in-ovo injection with sodium selenite and continuous treatment with it after hatching improve the antioxidant status and productive performance of the broiler, and it can be recommended to use sodium selenite in early egg nutrition during incubation period and its supplementation with drinking water of chicks after hatching.

IMPACT OF VITAMIN E AND SELENIUM TREATMENT IN-OVO AND AFTER HATCHING OF BROILER

This study was aimed to investigate the effect of in-ovo injection with vitamin E and selenium during the incubation and post-hatching period. 360 fertilized eggs of Ross 308 broiler breeders were incubated, then distributed on 10th day into three groups (120 eggs/group). 1st group: uninjected eggs, 2nd group: eggs were injected with 0.1 ml deionized water/egg in the chorioallantoic cavity, and 3rd group: eggs were injected with 0.1 ml/egg of Introvit-E-Selen in chorioallantoic cavity. After hatching, 270 chicks were randomly distributed into six groups, and reared until 42 days aged as follows: birds in 1st, 3rd and 5th groups drinks tap water only (free from any addition), while birds of other groups, were reared on drinking water supplemented with 12.5 mg vitamin E and 500 µg sodium selenite/liter water. Results showed a significant increase in hemoglobin, lymphocytes% and serum globulin, and a significant decrease in packed cell volume%, heterophils%, heterophils/lymphocytes ratio, glucose, cholesterol, triglycerides and albumin concentration as compared with control. In conclusion, vitamin E and selenium have enhanced some immunological aspects and reduced stress, as well as a number of hematological parameters of broiler chicks, also, the continuity of Vit.E-Selenium addition led to continuous improvement of physiological parameters, and when it stopped, the values of those parameters were retracted.

Influence of In Ovo Leptin Injection into Yolk Sac on Embryo Development, Blood Biochemical Parameters and Lipid Metabolism of Broiler Chicks during Early Post-Hatching Period

The study aimed to investigate the effect of in ovo (IO) leptin injection on yolk sac leptin concentration, embryo development, blood lipid metabolism, and biochemical parameters of broiler chicks during the early post-hatching period. Hatching eggs were weighed and placed in an incubator with 100 eggs/4 replications/group. The groups were: non-injected group (C); and 3 injected groups with 100 μl of phosphate buffer solution (PBS); 0.5 μl leptin (L0.5), and 1 μl leptin (L1) in 100 μl of PBS. Pure leptin hormone dissolved in PBS was injected into the yolk sac on day 7 of incubation. Yolk/yolk sac leptin concentrations at the onset of incubation, on days 7 and 15 of incubation, and at hatching were determined. Embryo/chick development was determined at all ages. Serum leptin, tri-iodothyronine (T3), thyroxine (T4), creatine kinase, total protein, uric acid, and lipid profiles were measured at hatching and day 7 of chick age. The leptin level of the yolk was similar to the leptin level of the yolk sac at hatching. Leptin level of a yolk sac was higher on 7th day than at other ages. IO injection* age was significant for serum leptin level, which was similar to one-day chicks in the L0.5 at day 7 of chick age. T3, T4, creatine kinase, uric acid, lipid profiles, and embryo/chick development did not change with IO leptin. Serum HDL level was higher in the leptin groups than C and PBS groups at hatching. IO leptin application affects blood lipid metabolism depending on dose level for male broiler chicks at the early post-hatch period, without affecting embryo/chick development.Leptin level of yolk was similar to leptin level of yolk sac at hatching. Leptin level of yolk sac was higher on 7th day than other ages. IO injection* age was significant for serum leptin level, which was similar to one-day chicks in the L0.5 at day 7 of chick age. T3, T4, creatine kinase, uric acid, lipid profiles, and embryo/chick development did not change with IO leptin. Serum HDL level was higher in the leptin groups than C and PBS groups at hatching. IO leptin application affects blood lipid metabolism depending on dose level for male broiler chicks at early post-hatch period, without affecting embryo/chick development.

Effect of In-ovo Injection of L-Arginine on Hatchability, Chick Quality, Performances and Muscle Histology of Native Chicken

This study aimed to determine the effect of in-ovo injection of L-arginine on hatchability, chick quality, performances, and muscle histology of native chicken. In-ovo injection was carried out on the 10th day. A total of 375 fertile eggs with an average weight ranged  39-43 g were grouped into 5 treatments. The first treatment was without injection (negative control), the second treatment was injection of NaCl solution 0.9% (positive control), the third treatment was injection of L-arginine solution 0.5 g per 100 ml of NaCl 0.9% (0.5%, m/v) The fourth treatment was injection of 1.0 g L-arginine solution per 100 ml of NaCl 0.9% (1.0%, m/v), and the fifth treatment was injection of 1.5 g L-arginine solution per 100 ml of NaCl 0.9% (1.5%, m/v). The injection was carried out at the pointed area of the egg in a vertical position (pointed below, blunt above). The Injection was carried out with a depth of 10 mm from the eggshell using an automatic injector. The results showed that all treatments produced the same hatchability. In-ovo injection of L-arginine has a beneficial effect on chick quality and post-hatch performance, the concentration of L-arginine solution used did not cause embryo death. In-ovo injection of 0.5% L-arginine increased hatching weight, weekly body weight, muscle mass, and myofiber size.

Short communication: Effects of in-ovo injection of endocrine disruptors and methyltransferase inhibitor on quail growth and egg-laying performances

Early experiences, including prenatal environment, are known to influence a wide variety of mechanisms involved in the phenotype elaboration. We investigated the effect of the addition of endocrine disruptors or of a methyltransferase inhibitor during the embryonic development of quails from different genetic backgrounds (four different quail lines) on their growth and egg-laying performances. Fifty-four pairs of parents per line were used and fertilised eggs from each pair were randomly divided into five groups: a control group without any injection, an injected control group treated by injection into the egg of sesame oil, and three groups treated by injection of Genistein, Bisphenol A or 5-Aza-2′-deoxycytidine. All quails were individually weighed at 8, 21, 36 and 78 days. The age at first egg laid and the number of eggs laid were recorded. These analyses revealed a significant impact of the treatment on growth but no influence on the egg-laying traits. All three molecules significantly affected at least one of the analysed growth traits. In conclusion, we showed that the injection of endocrine disruptors or DNA methyltransferase inhibitor into the egg had significant effects on quail development; these effects were specific to each treatment, but no interaction between line and treatment was observed.

Using in-ovo injection of olive pulp extract and vitamin C to improve hatchability, post hatch growth performance, carcass traits and some biochemical blood analysis in broiler chickens

A total of 630 fresh hatching eggs containing live embryo at 14 day of incubation were distributed randomly into seven treatment groups (three replicates/treatment, 30eggs/each) and the fertile eggs were injected in the yolk sac as following groups: eggs were un –injected (T1), eggs were injected with hole only as negative control (T2), eggs were injected with distilled water as positive control (T3), eggs were injected with OPE at 500 and 1000ppm/egg, T4 and T5), while eggs were injected with Vit C at 4 and 8mg/egg (T6 and T7) respectively. The newly hatched chicks resulting from previous treatments were raised till 5 weeks old. Results showed that hatchability %, hatched chicks weight significantly improved for OPE (1000ppm/egg, T5) compared with vitamin C groups. However, performance of chicks resulting from injected eggs with (8 mg/egg, Vit C, T7) showed significantly (P≤0.001) increase in body weight (bwt), body weight gain (bwt) and feed intake than control groups. Measurements of carcass traits of OPE (1000ppm/egg) showed significant improvement in dressing weight when compared to those all injected control groups. Birds resulting from injected eggs with vit C treatments having higher plasma total protein and globulin level compared to others in non-injected control group. Additionally, in-ovo OPE (1000ppm/egg) injection resulted in boosted plasma antioxidants enzymes activities and significantly increased plasmaT4 concentrations compared with different control groups. In conclusion, in-ovo injection at day14 of incubation with either of OPE or vitamin C has positive effect on hatchability %, chick performance, dressing weight and anti-oxidative status of hatched chicks. Hence, in-ovo injection with OPE (1000ppm/egg) at14th day of incubation could be recommended for improving chick’s health.

RESPONSE OF BROILER CHICKEN TO INOVO ADMINISTRATION OF DIFFERENT LEVELS OF ROSEMARY OIL(ROSMARINUS OFFICINALIS)

This study was conducted to determine the percentage of hatchability, post-hatch growth performance, immune response of broiler subjected to in- ovo injection of different doses of rosemary oil. A total of 300 eggs of ross broiler strain were obtained.The experiment distributed into five treatment groups: T1, Negative Control T2, positive control (in ovo injection of 0.05 ml distilled water) T3, in ovo injection of 0.05ml of rosemary oil; T4, in ovo injection of 0.075 ml of rosemary oil; T5, in ovo injection of 0.1 ml of rosemary oil.Highest hatchability percentage was shown in 0.1ml rosemary oil -injected hatching eggs. The final weight of birds from 0.075 and 0.1 ml of rosemary oil-injected eggs was significantly (P &lt; 0.05) highest through the experiment. Feed intake and feed conversion ratio were improved with in ovo administration of rosemary oil at 0.075 and 0.1 ml doses. In addition, the level of blood cholesterol and blood glucose were decreased (p&lt;0.05) in birds from rosemary oil-injected eggs. The obtained data showed a positive effect of in-ovo injection of rosemary oil on stimulating bird's immunity.

Effect of In-ovo Injection of Herbal Extracts on Post-hatch Performance, Immunological, and Physiological Responses of Broiler Chickens

Effect of In-ovo Injection of Herbal Extracts on Post-hatch Performance, Immunological, and Physiological Responses of Broiler Chickens

Effects of In-Ovo injection of Biotin on chick’s embryonic development and physiological traits

This study was conducted at the local hatchery in Ramadi, Anbar Iraq from 1st to 23th Dec. 2018, to 26 Feb 2019. The objectives of this study were to investigate the effect of injected eggs hatching in times and different concentrations of Biotin in growth and embryonic development, hatchability. Six hundred eggs of hatching types (Ross 308) and injected with different concentrations of biotin at age of 0 days (before placing in the hatchery) and 18 days of incubation. Eggs were divided into five groups (120 eggs for each) as follows: 1.T0: Control group placed in the hatchery without injection. 2.T1: Injected with a dose of 100 μg biotin at age of zero. 3. T2: Injected with dose 75 μg biotin at age zero. 4.T3: Injected with a dose of 100 μg biotin at age 18 days of incubation. 5.T4: Injected with a dose of 4175 μg biotin at age of 18 days of incubation. Statistical analysis was performed (CRD) (P=0.065) results show: Increase length of the embryo, diameter of vascular region and number of pairs of somites at 3 days of incubation for T2. Increase percentage of embryonic weight, decrease the percentage of albumin and the percentage of at 7 days of incubation for T1 and T2. Increase in percentage of embryonic weight and amniotic sac and liquid, decrease in the percentage of albumin and yolk, at 14 days of incubation for T2. Increase percentage of embryonic weight, decrease the percentage of yolk at the age of 17 days incubation for T2. Increase hatchability of total eggs and fertile eggs. Decrease embryonic mortality and different stages of embryonic development. Concluded that In-Ovo injection of the hatching eggs with biotin contributed to increase physiological traits and embryonic development.