پردیس کشاورزی و منابع طبیعی دانشگاه تهران Iranian Journal of animal Science 2008-4773 54 4 2023 11 22 The effect of feeding egg yolk multi- antibodies on growth performance, some blood parameters and feces microbial culture in suckling Holstein calves The effect of feeding egg yolk multi- antibodies on growth performance, some blood parameters and feces microbial culture in suckling Holstein calves 351 365 93061 10.22059/ijas.2023.353724.653929 FA Omid Bouzari Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. 0000-0002-5052-3753 Armin Towhidi Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. 0000-0002-3288-1709 Mahdi Zhandi Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. 0000-0003-2886-9747 Mohammadhosein Moazeni Zadeh Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Journal Article 2023 01 16 The present study was conducted to evaluate the effect of supplementing egg yolk multi-antibodies against diarrhea pathogens on growth performance, hematological parameters, and feces microbial culture of Holstein suckling calves. 48 calves (male and female) were randomly assigned to three treatments and kept individually from 1 to 28 days of age. The treatments included the group fed with immunopro supplement (containing egg yolk multi-antibody and various probiotics, prebiotics, vitamins, and electrolytes) (IP), the positive control group containing all components of the treatment group without multi-antibody (C+) and the negative control group (C-). Feed intake was recorded every day, body weight and Skeletal growth parameters of calves was recorded every seven days, hematological parameters were measured on day 1 and 28, and feces microbial culture parameters were measured on day 28. The use of IgY supplements increased body weight, daily weight gain, dry matter intake, and feed efficiency (P < 0.05). Skeletal growth parameters (withers height, hip height, hip width, and Heart girth), hematological parameters, and feces microbial culture parameters were not affected by the experimental treatments. The use of IgY supplement decreased feces score, duration of diarrhea, and body temperature (P <0.05). The results suggested that the consumption of IgY against diarrhea pathogen's for up to 28 days promoted the immunity and health of Holstein's suckling calves. The present study was conducted to evaluate the effect of supplementing egg yolk multi-antibodies against diarrhea pathogens on growth performance, hematological parameters, and feces microbial culture of Holstein suckling calves. 48 calves (male and female) were randomly assigned to three treatments and kept individually from 1 to 28 days of age. The treatments included the group fed with immunopro supplement (containing egg yolk multi-antibody and various probiotics, prebiotics, vitamins, and electrolytes) (IP), the positive control group containing all components of the treatment group without multi-antibody (C+) and the negative control group (C-). Feed intake was recorded every day, body weight and Skeletal growth parameters of calves was recorded every seven days, hematological parameters were measured on day 1 and 28, and feces microbial culture parameters were measured on day 28. The use of IgY supplements increased body weight, daily weight gain, dry matter intake, and feed efficiency (P < 0.05). Skeletal growth parameters (withers height, hip height, hip width, and Heart girth), hematological parameters, and feces microbial culture parameters were not affected by the experimental treatments. The use of IgY supplement decreased feces score, duration of diarrhea, and body temperature (P <0.05). The results suggested that the consumption of IgY against diarrhea pathogen's for up to 28 days promoted the immunity and health of Holstein's suckling calves. https://ijas.ut.ac.ir/article_93061_6dd3e48a8c411fad22210d8cb69168d1.pdf