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        ¬JµM¬O¯f­ì¾Ç¥¼¥[½T©w¡A§Ú­Ì¤£§«ºÙ¨ä¬°¡§Âû¤j¨xµÊ¯f¦]¤l¡¨( Big  liver  and  spleen  disease  factor , BLSF )¡C±N¯f§÷¸g¹L 0.22 ·L¦Ì ( um ) ¤§Âo½¤ ( filler  membrane ) Âo¹L«á¡A±µºØÂû®É·|µo¥ÍÂû¤j¨xµÊ¯f¡F¦Ó¥B BLSF »P¥ô¦ó¤wª¾ªº®a¸V¯f­ì¨S¦³¦å²M¾Ç¥æ¤e¤ÏÀ³ ( cross-reacting )¡A¦]¦Ó³Q»{¬°¬O¤@ºØ¶Ç¬V©Ê¯f¬r¯e¯f¡C

        Avery ¤ó´¿©ó 1988 ¦~¥Î¹q¤lÅã·LÃèÀˬd¨x²Õ´©M²Õ´°ö¾iª«®É¡Aµo²{¤F¤@®è²Ó­M°ö¾i¦]¤l¡A·í®É¥L§â³oºØ¯f­ìÅéºÙ§@¡§Åã©Ü½¤¯f¬r¡¨( togavirus  like )¡A¨Ã¥B¹ï¦³¾÷·»¾¯ ( organic  solvent ) ¤Q¤À±Ó·P¡A¦]¦Ó±À´ú¬O¤@ºØ¦³Ån½¤ªº¯f¬r¡CCurtin ¤ó¦b¤@½g¹êÅç³ø§i¤¤»¡¡A¥ÎÂû­F¨x²Ó­M ( chick  embryo  hepatocyte ) «h¯à¤ÀÂ÷¨ì¤@®è¥i²£¥Í¡§²Ó­M¯f²z®ÄÀ³¡¨( cytopathic  effect ) ªºÂû¤j¨xµÊ¯f¦]¤l¡CMcFerran µ¥¤S©ó 1993 ¦~³ø¾ÉºÙ¡A¥ÎÂû¤j¨xµÊ¯fªº¯f§÷¸g¹LÂ÷¤ß«á¡A¦A±µºØÂû­FµÇ²Ó­M ( chick  embryo  renal  cells )¡A¯à±q¤¤¤ÀÂ÷¨ì¤@®è¦³Ån½¤ªº®Ö¿}®Ö»Ä¯f¬r ( ribonucleic  acid  virus ,  RNA  virus )¡C¦ý¬O¡A³o¨Ç¦]¤l ( µL½×­þ¤@­Ó ) ¦^Âk°Êª«³£¨S¦³Àò±o¦¨¥\¡C

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        ¥Î§K¬Ìã¯×ÂX´²¸ÕÅçªk¨ÓÀË´ú§ÜÅé¡A¤@ª½³Q¦¨¥\¦a¥Î©ó°Ó·~©ÊÂû¸sªºÂû¤j¨xµÊ¯f¡F¦b±`³WºÊ´úªº­p¹º¤¤¡A¤@¯ë¨C¹j¥|¶g©âÀˤ@­ÓÂû¸sªº 10 ~ 20 ¥÷¦å¼Ë´N¥i¥H¤F¡Cã¯×ÂX´²¸ÕÅçªkÁöµM²«K©ö¦æ¡A¦ý¦³®É¥ç¥i¥X²{¡§°²¶§©Ê¡¨¤ÏÀ³¡FªÈ¥¿ªº¤èªk¬O¦h°µ´X¦¸¸ÕÅç¡A¨Ã¥H¥¿±`¨x²Õ´§Ü­ì§@¬°¹ï·Ó¡C¤S¾Ú Payne µ¥³ø§iºÙ¡A¥L¤w¬ã¨s¥X¡§úAÁp§K¬Ì§lªþ´ú©wªk¡¨( Enzymelinked   immunosorbent  assay )¡A¥Î¦¹ªk¥ç¯à§JªA°²¶§©Ê¡A¤£¹L»Pã¯×ÂX´²¸ÕÅçªk¤ñ°_¨Óµy·L¶O¨Æ¨Ç¡C( Payne , C.J. et  al : ELISA  testing  of  U.S.breeders  and   layers  for  big  liver  and  spleen  disease.   In : Proceedings  40th  Western  Poultry  Disease.   Conference. Acapulco. 1991. )

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