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돼지생식기호흡기증후군 바이러스가 흉막폐렴에 미치는 영향(혈청학적 및 백혈구아군 분포율에 관한 연구)

Effect of porcine reproductive and respiratory syndrome virus on pigs with pleuropneumonia(Studies on serology and proportion of porcine subpopulation of peripheral blood)

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Abstract

The purpose of this study was to evaluate the effect of a subsequent infection of porcine reproductive and respiratory syndrome(PRRS) virus to pigs with A pleuropneumonia. Twenty three 7-week-old commercial pigs were infected intratracheally with PRRS virus Corresponding authorDr. Jeonghee Han, DVM, PhDTel : +82-33-250-8657 Fax : +82-33-256-3722E-mai l: hanjh@kangwon.ac.krand/or A pleuropneumoniae serotype 5 . Serum antibody titers were examined by an enzyme-linked immunosorbent assay(ELISA) and proportion of porcine leukocyte subpopulations in peripheral blood was examined by flow cytometry. In this experiment, antibodies against PRRS virus and A pleuropneumoniae were detected at 2 weeks and 1 week postinfection and the number of antibody positive pigs were gradually increased. And in proportion to leukocyte subpopulations in peripheral blood of pigs infected with A pleuropneumoniae compared with pigs administrated with saline, the proportion of PoCD4 and N cells were increased(P<0.1). Furtherrmore, in proportion to leukocyte subpopulations in peripheral blood of pigs infected with PRRS virus followed by A pleuropneumoniae compared with pigs administrated with saline, the proportion of MHC class II, PoCD4 and B cells were significantly increased(P<0.1)The results indicated that dual infection with PRRS virus and A pleuropneumoniae induced the stronger immune responses associated with macrophages and Th cells in pigs than single infection with PRRS virus or A pleuropneumoniae._______________________________________

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