title: Heterophil to lymphocyte ratios during perinatal and neonatal stages in chickens.
abstract: 1. Heterophils (H) and lymphocytes (L) were measured in embryos that had pipped into the air cell and through the shell, and in chicks from 0-d-old to 8 d of age. 2. Numbers of lymphocytes in the perinatal stages were very low with H:L ratios greater than 5.0. 3. Posthatching H:L ratios decreased in a quadratic manner from 1.76 at hatch to 0.39 on day 8.
authors.affiliation: Animal and Poultry Sciences Department, Virginia Polytechnic Institute and State University, Blacksburg 24061-0306.
authors.forename: I
authors.initials: I
authors.lastname: Zulkifli
authors.forename: P B
authors.initials: PB
authors.lastname: Siegel
mesh_terms: D000375:Aging / Q000097:blood*; D000818:Animals; D002645:Chickens / Q000097:blood* / Q000254:growth & development; D007958:Leukocyte Count; D007962:Leukocytes / Q000502:physiology*; D008214:Lymphocytes / Q000502:physiology*; D012044:Regression Analysis