title: Changes in hematological, blood gas, and serum biochemical variables in broilers during exposure to simulated high altitude.
abstract: One-day-old broilers were reared until 35 days of age at both natural low (100 m) and simulated high altitude (2133 m) to assess the incidence and development of ascites syndrome. Clinical measurements were conducted at 7, 14, 21, 28, and 35 days of age. Birds reared at 2133 meters exhibited significantly (P less than or equal to 0.05) reduced body weights at 7 through 28 days of age. Total serum calcium and biochemical enzyme activities were found to be altered at 35 days of age. In addition, the high-altitude group had significantly (P less than or equal to 0.05) higher erythrocyte counts, hematocrits, and hemoglobin at 14, 21, 28, and 35 days of age and higher serum inorganic phosphorus at each weekly sample time than birds at the low altitude. Total mortality was 20.3% at 2133 meters and 4.6% at 100 meters. The incidence of ascites syndrome in the high-altitude group ranged from 16.6% to 61.1% during the 5-week experimental period.
authors.affiliation: Agricultural Research Service, Food Animal Protection Research Laboratory, College Station, Texas 77845.
authors.forename: A G
authors.initials: AG
authors.lastname: Yersin
authors.forename: W E
authors.initials: WE
authors.lastname: Huff
authors.forename: L F
authors.initials: LF
authors.lastname: Kubena
authors.forename: M H
authors.initials: MH
authors.lastname: Elissalde
authors.forename: R B
authors.initials: RB
authors.lastname: Harvey
authors.forename: D A
authors.initials: DA
authors.lastname: Witzel
authors.forename: L E
authors.initials: LE
authors.lastname: Giroir
mesh_terms: D000531:Altitude; D000818:Animals; D001201:Ascites / Q000097:blood / Q000209:etiology / Q000401:mortality / Q000662:veterinary*; D001774:Blood Chemical Analysis / Q000662:veterinary; D001784:Blood Gas Analysis / Q000662:veterinary; D001835:Body Weight; D002118:Calcium / Q000097:blood; D002645:Chickens; D003345:Corticosterone / Q000097:blood; D004906:Erythrocyte Count / Q000662:veterinary; D004909:Erythrocyte Indices; D006321:Heart / Q000254:growth & development; D006400:Hematocrit / Q000662:veterinary; D006454:Hemoglobins / Q000032:analysis; D008099:Liver / Q000254:growth & development; D008297:Male; D009929:Organ Size; D010758:Phosphorus / Q000097:blood; D011201:Poultry Diseases / Q000097:blood / Q000209:etiology* / Q000401:mortality; D011897:Random Allocation
chemical_list: D006454:Hemoglobins; D010758:Phosphorus; D002118:Calcium; D003345:Corticosterone