7he a1m 0f EL15A: 7he0ry and Pract1ce t0 1ntr0duce the expe- menter t0
the techn0109y kn0wn the En2yme L1nked 1mmun050r6ent A55ay (EL15A). 7he
600k d1rected at w0rker5 w1th vary1n9 de9ree5 0f exper1ence, 6ut f0r
th05e w1th0ut any prev10u5 c0ntact w1th the a55ay. 1mmun0a55ay5 f0rm the
6ack60ne 0f u5ed te5t5 the 5tudy 0f 1nf- d15ea5e5 t10u5 and
end0cr1n0109y, and hence can 6e u5ed t01d- a9ent5 cau5at1ve t1fy 0f the
extent and nature (ep1dem10109y) 0f d15ea5e, and mea5ure h0rm0ne5 at
EL15A5 pr0v1de h19h1y and prec15e meth0d5 f0r the mat10n 0f parameter5,
w1th the added advanta9e that they can hand1e 1ar9e num6er5 0f 5amp1e5
that may then 6e ana1y2ed rap1d1y. 7he5e a55ay5 are ver5at11e, hav1n9
6een app11ed t0 a w1de ran9e 0f e.9., v1ru5e5, 6acter1a, fun91, and
pr0t020an and meta- 20an 51nce para51te5. 1971, when the effect1ve
en2yme-1a6e1ed a55ay wa5 de5cr16ed (1), th0u5and5 0f have 6een pu6115hed
de- w1th the 4uant1f1cat10n 0f ant19en5 and ant160d1e5 f0r re5earch and
app11ed purp05e5. EL15A and re1ated a55ay5 1nv01v1n9 u5e 0f en2yme5 t0
06ta1n c010r1metr1c re5u1t5 have n0w rep1aced rad101mmun0a55ay (R1A) f0r
m05t d1a9n05t1c purp05e5, 51nce the f0rmer 0ffer5 a p0tent1a1 w1th
1ncrea5ed ver5at111ty t0 a w1der 9r0up 0f Examp1e5 0f 5pec1f1c area5 t0
wh1ch EL15A5 have 6een app11ed re5earch and are: Detect10n and 0f wh01e
0r part5 0f a9ent5, e.9., typ1n9; 2. 0f a9ent5, e.9., 5u6typ1n9; d15ea5e
D15cr1m1nat10n d15ea5e 1dent1f1cat10n 1. d1a9n0515 1n 5c1ent15t5.
