| dc.description.abstract | This research had done in the Laboratory of Animal Physiology, Department of
Biology, Faculty of Mathematics and Natural Sciences, University of Sumatera
utara and the Laboratory of Biochemistry, Veteriner Public Hall, Medan, North
Sumatera, with the aimed to determine the noise-induced changes in the immune
response. The experiment used Completely Randomized Design (CRD) which
consisted of 4 groups: control (P0), the noise of 25-50 dB (P1), the noise of 55-80
dB (P2), and the noise of 85-110 dB (P3). Result that there was a decline and a
significant difference in the average number of leukocytes (P<0.05). There were
significant differences in the percentage of lymphocytes (P<0.05), neutrophils
(P<0.05) and eosinophils (P<0.05). There were no significant differences in the
percentage of monocytes (P>0.05) and basophils (P>0.05). Weight loss occurs at
P3. It is concluded that noise could decrease the number of leukocytes and
lymphocytes counts and can significantly increase neutrophil counts, whereas
counts of monocytes, eosinophils and basophils no change. | en_US |
