skick pareekshan

1913 mein vikasit skick pareekshan ack twacha pareekshan haye jiska upayog yeh nirdhaarit karane key liye kiya jaataa haye kii koee vyakti diptheria key prati atisamvedansheel haye yaa naheen. iska naam isake aavishkaarak bella skick (1877-1967) key naam parr rakhaa gayaa thaa, joe hangri mein janme americi baal roga visheshagya they.
prakriya.
pareekshan ack saral prakriya haye. ack chhoti matra (0.00 millie) mein diluted (1/50 mld) diptheria toxin koo vyakti kii ack baanh mein intradermally aur doosari parr ack heat inactivated toxin koo niyantran key roop mein inject kiya jaataa haye. yadi kissy vyakti key paas isase ladane key liye paryaapt antibody naheen haye, tou injection key aspas kii twacha laal hoe jaayegi aur sooj jaayegi, joe ack sakaratmak parinam kaa sanket detee haye. yeh soojan kuchh dinon key baad gayab hoe jaati haye. yadi vyakti mein pratiraksha haye, tou bahut cumm yaa koee soojan aur lalima naheen hogi, joe ack nakaratmak parinam kaa sanket detee haye.
parinamon kii vyakhya iss prakaar kii jaa sakati haih
pareekshan taba banaaya gayaa thaa jaba pratirakshan agents kii kamee thee aur bahut surakshit naheen they; haalaanki, jaise-jaise nae aur surakshit vishaakt padaarth upalabdh hue, samvedansheelta parikshanon kii aavashyakta naheen thee.

