Abstract：
:Changes in thermal environment can invoke a stress response in pigs, which in turn can potentially impact their immune system and disease susceptibility. We investigated effects of heat stress and social rank on behavior, immune responsiveness, and performance of pigs challenged with porcine reproductive and respiratory syndrome (PRRS) virus. Sixty-four 7-week-old PRRS-naïve pigs were assigned to each of four experimental treatments consisting of a 2 x 2 factorial design: PRRS (PRRS- or PRRS+) and environmental temperature (24 degrees C or 32 degrees C). Blood samples were taken prior to and at days 7 and 14 post-inoculation, and alveolar macrophages were collected via bronchoalveolar lavage at day 14. Total white blood cell counts, natural killer cytotoxicity, macrophage numbers, macrophage subpopulations, and performance measures were all significantly affected by social rank, heat stress, and/or infection status of the pig. Heat stress and PRRS status also significantly influenced the amount of time pigs spent lying with or without contacting another animal. Cortisol and various immune measures were also affected by PRRS status. These results show not only that intranasal inoculation with PRRS virus affects physiological, behavioral, and performance measures in growing pigs, but that social rank influences pigs' immune responsiveness to PRRS as well. Moreover, heat stress does not have additive negative impact on physiological or performance traits in pigs challenged with PRRS virus.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Sutherland MA,Niekamp SR,Johnson RW,Van Alstine WG,Salak-Johnson JLdoi
10.1016/j.physbeh.2006.08.029subject
Has Abstractpub_date
2007-01-30 00:00:00pages
73-81issue
1eissn
0031-9384issn
1873-507Xpii
S0031-9384(06)00382-9journal_volume
90pub_type
杂志文章abstract：:Rats are nocturnal feeders. The present results show that when either the cost of procuring a meal or the cost of consuming it increases differentially in the dark relative to the light, rats shift their feeding activity to the light phase of the light/dark cycle. These results suggest that some of the same factors th...
journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(83)90081-1
更新日期：1983-10-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(85)90369-5
更新日期：1985-05-01 00:00:00
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journal_title：Physiology & behavior
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更新日期：2019-03-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(82)90047-6
更新日期：1982-04-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1994-09-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(91)90035-m
更新日期：1991-02-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2012.02.016
更新日期：2012-05-15 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(94)00203-h
更新日期：1995-01-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(97)00514-3
更新日期：1998-02-15 00:00:00
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journal_title：Physiology & behavior
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doi：10.1016/j.physbeh.2008.07.001
更新日期：2008-10-20 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2003.08.009
更新日期：2003-11-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(84)90269-5
更新日期：1984-03-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 临床试验,杂志文章
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更新日期：2002-08-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2014.03.028
更新日期：2014-05-10 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/0031-9384(94)90352-2
更新日期：1994-11-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/j.physbeh.2018.08.002
更新日期：2018-10-15 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(99)00142-0
更新日期：1999-12-01 00:00:00
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journal_title：Physiology & behavior
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doi：10.1016/0031-9384(94)90332-8
更新日期：1994-11-01 00:00:00
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journal_title：Physiology & behavior
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更新日期：1998-04-01 00:00:00
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journal_title：Physiology & behavior
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更新日期：1985-04-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1996-12-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1982-01-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1989-10-01 00:00:00
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journal_title：Physiology & behavior
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更新日期：2019-02-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
doi：10.1016/s0031-9384(02)00964-2
更新日期：2003-02-01 00:00:00
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journal_title：Physiology & behavior
pub_type： 杂志文章
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更新日期：1999-03-01 00:00:00
