03115naa a2200445 a 450000100080000000500110000800800410001910000210006024501100008126000090019152019380020065000200213865000210215865000100217965000150218965000170220465000160222165000180223765000120225565000100226765000220227765000160229965000180231565300210233365300170235465300170237165300110238865300120239965300110241165300160242265300170243865300240245570000170247970000220249670000170251870000210253570000250255670000160258177300720259715141182015-03-18       1991    bl uuuu     u00u1 u    #d1 aBLACKBURN, H. D.  aInteraction of parasitism and nutrition and their effects on production and clinical parameters in goats.  c1991  aAbstract: Weaned wether goals (n=144) approximately 6.months of age were placed in a 2x3 factorial design experiment for 5 months to test the main effects and interaction of two levels of nutrition (growth+maintenance, NUTl; twice growth+maintenance, NUT2) and three levels of Haemonchus contortus burden (0, 500 and 2000 larvae administered every 2 weeks: WO, W500 and W2000, respectively) on weight, feed intake, level of infection and packed cell volume (PCV). The rationale for the experimental design was based on the lack of information concerning the interaction between nutritional status and worm burden. Results indicated significant effects of worm burden levels on PCV, faecal egg contents (eggs per gram of feces (EPG), actual worm numbers, feed intake and efficiency of feed utilization. Nutrition X worm burden interactions were also significant for PCV and EPG. However, the differences detected for PCV and actual worm numbers did not translate into large or consistent differences in body weight. Goats on NUT2, after an initial period, showed little difference in body weight, irrespective of worm burden. Within the NUTI level, WO kids weighed more than W500 or W2000 kids throughout the study. Although not statistically significant, this constitutes a trend towards an interaction between nutrition and worm burden. ln both nutrition levels, there were no body weight differences between W500 and W2000 until the last 14 days. Feed intake was depressed in the first 3 months of the experiment for infected animais, but was subsequently followed by a compensatory reaction. Lower establishment rates, based on actual worm counts, were observed for the higher infection level, but in both infection levels establishment rates tended to decrease with time. Nutrition was found to be more important to counteract the consequences of a parasitic infection than to counteract the establishment of that same infection.  aAnimal diseases  aAnimal nutrition  aGoats  aParasitism  aParasitology  aWeight Gain  aAlimentação  aCaprino  aFezes  aNutrição animal  aParasitismo  aParasitologia  aAnimal disorders  aEndoparasita  aEndoparasite  aFaeces  aFeeding  aGrowth  aHaematocrit  aHematócrito  aParâmetro clínico1 aROCHA, J. L.1 aFIQUEIREDO, E. P.1 aBERNE, M. E.1 aVIEIRA, L. da S.1 aCAVALCANTE, A. C. R.1 aROSA, J. S.  tVeterinary Parasitology, Amsterdamgv. 40, n. 1/2, p. 99-112, 1991.