| |
| Complement-fixation test. An antiserum for Eyach with a homologous titer of 32 was tested against antigens for 49 non-group B tick-borne viruses; the serum reacted only with Colorado tick fever (CTF) antigen, with a titer of 16. |
| In another test, 15 polyvalent grouping sera or ascitic fluids were tested against an antigen for Eyach; only the fluid containing CTF antibodies reacted with Eyach. |
| The CF relationship between CTF and Eyach is as follows: |
| |
| Antigen | Serum |
|---|
| | Eyach | CTF |
|---|
|
| | Serum titer/antigen titer | | Eyach | 128/128 | 64/64 | | CTF | 32/64 | 256/512 |
|
| Neutralization tests: In newborn mice, by intracerebral route ofinoculation. |
| |
| Serum | Virus |
|---|
| | Eyach | CTF |
|---|
|
| | a LNI expressed in dex | | Eyach | 3.3 a | 0.3 | | CTF | 2.9 | 4.0 | | Normal | |
|
| |
