PATHOPHYSIOLOGY OF FESCUE TOXICOSIS

被引:87
作者
THOMPSON, FN [1 ]
STUEDEMANN, JA [1 ]
机构
[1] USDA ARS,SO PIEDMONT CONSERVAT RES CTR,WATKINSVILLE,GA 30677
关键词
D O I
10.1016/0167-8809(93)90050-Y
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The pathophysiology of fescue toxicosis is discussed relative to observed symptoms and the inhibition of animal production (average daily pin and decreased reproductive efficiency). Hyperthermia, vasoconstriction and perhaps increased activity of hepatic mixed-function oxidases are important effects. Perhaps secondarily intake is reduced by the above mechanisms and possibly by unpalatability factors. The decreased milk yield is considered a function of decreased intake and suppressed prolactin secretion. Evidence is discussed that corpora lutea in cattle are morphologically altered and consequently may not support a pregnancy. The effect of endophyte presence upon the outcome of pregnancy in the mare is considered a function of an alteration in placental function as a result of vasoconstriction.
引用
收藏
页码:263 / 281
页数:19
相关论文
共 112 条
  • [31] GARRETT L W, 1980, Journal of Animal Science, V51, P237
  • [32] GAY N, 1988, Applied Agricultural Research, V3, P182
  • [33] Goldstein M, 1980, Adv Biochem Psychopharmacol, V23, P75
  • [34] HANNAH SM, 1990, J ANIM SCI, V68, P1693
  • [35] CORPORA-LUTEA OF LARGE DOMESTIC-ANIMALS
    HANSEL, W
    CONCANNON, PW
    LUKASZEWSKA, JH
    [J]. BIOLOGY OF REPRODUCTION, 1973, 8 (02) : 222 - 245
  • [36] Heldmaier G, 1986, PINEAL RES REV, V4, P97
  • [37] SUMMER FESCUE TOXICOSIS IN LACTATING DAIRY-COWS AND SHEEP FED EXPERIMENTAL STRAINS OF RYEGRASS TALL FESCUE HYBRIDS
    HEMKEN, RW
    BULL, LS
    BOLING, JA
    KANE, E
    BUSH, LP
    BUCKNER, RC
    [J]. JOURNAL OF ANIMAL SCIENCE, 1979, 49 (03) : 641 - 646
  • [38] INTERACTION OF ENVIRONMENTAL-TEMPERATURE AND ANTI-QUALITY FACTORS ON THE SEVERITY OF SUMMER FESCUE TOXICOSIS
    HEMKEN, RW
    BOLING, JA
    BULL, LS
    HATTON, RH
    BUCKNER, RC
    BUSH, LP
    [J]. JOURNAL OF ANIMAL SCIENCE, 1981, 52 (04) : 710 - 714
  • [39] EFFECTS OF INDUCED FESCUE TOXICOSIS ON PLASMA AND TISSUE CATECHOLAMINE CONCENTRATIONS IN SHEEP
    HENSON, MC
    PIPER, EL
    DANIELS, LB
    [J]. DOMESTIC ANIMAL ENDOCRINOLOGY, 1987, 4 (01) : 7 - 15
  • [40] HENTGES EJ, 1984, J ANIM SCI S1, V59, P215