Short- and long-term responses to fescue toxicosis at different ambient temperatures

Intake of endophyte-infected tall fescue by cattle results in fescue toxicosis, which is characterized by increased hyperthermia during heat stress and concomitant reductions in feed intake and growth. Rats were monitored at 21 or 31 °C for short- or long-term periods to determine temporal changes a...

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Published inJournal of thermal biology Vol. 33; no. 4; pp. 213 - 222
Main Authors Settivari, R.S., Evans, T.J., Eichen, P.A., Rottinghaus, G.E., Spiers, D.E.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2008
Subjects
Ergopeptide
Fescue toxicosis
Rat
Thermoregulation
Thermoregulation
Fescue toxicosis
Ergopeptide
Rat
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Summary:Intake of endophyte-infected tall fescue by cattle results in fescue toxicosis, which is characterized by increased hyperthermia during heat stress and concomitant reductions in feed intake and growth. Rats were monitored at 21 or 31 °C for short- or long-term periods to determine temporal changes associated with the intake of endophyte-infected ( E+) or uninfected ( E−) fescue seed diets. Core temperature only changed in rats fed E+ diet at 31 °C. Intake of E+ diet reduced feed intake, daily gain, and serum prolactin. There were temporal and thermal differences in the response to endophytic toxins, with short-term changes diminishing over time at 21 °C, but increasing for certain parameters at 31 °C.
Bibliography:ObjectType-Article-1
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ISSN:0306-4565
1879-0992
DOI:10.1016/j.jtherbio.2007.12.001