Morphological response of maternal antibody-negative chickens infected with Marek's disease virus (MDV), herpesvirus of turkeys (HVT) and both viruses.
D000818:Animals; D002642:Chick Embryo; D002645:Chickens / Q000276:immunology*; D006566:Herpesviridae Infections / Q000473:pathology / Q000662:veterinary*; D008380:Marek Disease / Q000473:pathology*; D011201:Poultry Diseases / Q000473:pathology*; D014422:Turkeys