Table 4.
MIF antibody titers and SPDs from reciprocal cross-reactions of mouse antisera to the members of the Rickettsia conorii complex.
| MIF antibody titer (SPD) of mouse antisera to *: | |||||
| Antigens | R. conorii | ITTR | AFR isolate A-167 | AFR isolate Chad | ISFR |
| R. conorii | 1,024 | 256 (4) | 256 (5) | 256 (5) | 256 (4) |
| ITTR | 512 (4) | 2,048 | 512 (4) | 256 (5) | 256 (5) |
| AFR isolate A-167 | 128 (5) | 256 (4) | 1,024 | 512 (2) | 256 (4) |
| AFR isolate Chad | 128 (5) | 256 (5) | 512 (2) | 1,024 | 256 (4) |
| ISFR | 128 (4) | 128 (5) | 128 (4) | 128 (4) | 512 |
* Titers are the reciprocals of the highest dilution of antisera that gave a positive reaction. SPDs are calculated according to the formula given in the Materials and Methods section.