title: E coli serotypes isolated from yolk sac of dead chick embryos.
mesh_terms: D000818:Animals; D002642:Chick Embryo / Q000382:microbiology*; D004926:Escherichia coli / Q000145:classification / Q000302:isolation & purification*; D005260:Female; D014817:Vitelline Membrane / Q000382:microbiology*