caa a22 4500 397567928 CHVBK 20180308164833.0 cr unu---uuuuu 161202e199611 xx s 000 0 eng 10.3382/ps.0751315 doi (NATIONALLICENCE)oxford-10.3382/ps.0751315 Group Selection for Adaptation to Multiple-Hen Cages: Humoral Immune Response [Elektronische Daten] [PATRICIA Y. HESTERS, W. M. MUIR, J. V. CRAIG] A selected line of White Leghorns, which has shown improved survivability and reduced feather loss in large multiple-hen cages, was evaluated for humoral immune response to SRBC under both stressed and unstressed conditions. Three lines of chickens (selected, control, and commercial) were housed in either single- (1 hen) or multiple-hen cages (12 hens, social competition) and subjected to a cold ambient temperature (0 C) at 33 wk of age and to two heating episodes (38 C) at 44 wk of age. Each hen was challenged intravenously with 1 mL of a 7% saline suspension of SRBC at the time that cold exposure was initiated. Hens subjected to high ambient temperatures had been exposed previously to a cold temperature, but were not challenged with SRBC until 16 to 18 h following the end of the second heating episode. Exposure to cold caused immunosuppression in single-caged hens, but not in hens in colony cages. Single- vs colony-caged hens of the control environment challenged with SRBC at 33 wk of age had similar primary hemagglutinin responses to SRBC. Hens subjected to heat experienced immunosuppression at 9 and 12 d following challenge to SRBC when compared to the controls. Hens of multiple-bird cages challenged with antigen at 44 wk of age had a significantly lower hemagglutinin response to SRBC than those reared in single-bird cages. The three lines of genetic stock had similar primary hemagglutinin responses to SRBC; the interactions of genetic stock with cage size or environmental temperature were not significant. It was concluded that genetically selecting hens for survival in multiple-hen cages did not affect their humoral immune response to SRBC. © 1996 Poultry Science Association, Inc. Breeding and Genetics nationallicence selection nationallicence multiple-hen cages nationallicence heat stress nationallicence cold stress nationallicence immune response nationallicence HESTERS PATRICIA Y. 3To whom correspondence should be addressed. aut MUIR W. M. aut CRAIG J. V. aut Poultry Science Oxford University Press 75/11(1996-11), 1315-1320 0032-5791 75:11<1315 1996 75 ps https://doi.org/10.3382/ps.0751315 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0751315 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- HESTERS PATRICIA Y. 3To whom correspondence should be addressed aut NATIONALLICENCE 700 1- MUIR W. M. aut NATIONALLICENCE 700 1- CRAIG J. V. aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/11(1996-11), 1315-1320 0032-5791 75:11<1315 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence SWISSBIB 397567154 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford