Pharmaceutical preparations in the nature of IgY antibodies, avian hyperimmune egg product and avian hyperimmune egg yolk product for therapeutics and prophylactic use for humans and animals and for use in aquaculture; pharmaceutical preparations in the nature of IgY antibodies, avian hyperimmune egg product and avian hyperimmune egg yolk product, namely, antibacterial treatments, anti-toxin treatments, anti-fungal treatments, anti-yeast treatments, anti-parasite treatments, anti-cytokine treatments, anti-receptor treatments, antibiotic treatments and antiviral treatments, for humans and animals and for use in aquaculture; pharmaceutical preparations in the nature of IgY antibodies, avian hyperimmune egg product and avian hyperimmune egg yolk product for repairing, modifying and modulating the intestinal microbiome; pharmaceutical and biological preparations for repairing, modifying and modulating the intestinal microbiome; preparations and substances for pharmaceutical and medical purposes, namely, for the treatment of gut dysbioses, inflammatory disorders and conditions, gastrointestinal diseases and disorders, gastrointestinal injury conditions, and digestive abnormalities; pharmaceutical and therapeutic preparations for use in the prevention and treatment of abnormalities in the human gut microbiome and gastrointestinal health; pharmaceutical preparations for medical, veterinary and aquaculture purposes, namely, antibacterial treatments, anti-toxin treatments, antibiotic treatments and antiviral treatments