Table 1. Antibody titers and serologic differentiation index (SDI) obtained from reciprocal cross-reactions of mouse antiserum with different Chlamydia-like organisms, as determined by immunofluorescence* www.cdc.gov/EID/content/14/1/168-T1.htm.
| Strains | Antigen titers (SDI) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Pr. naegleriophila | Pr. amoebophila | Simkania negevensis | P. a. strain Seine | Waddlia chondrophila | Neoclamydia hartmannellae | Criblamydia sequanensis | R. crassificans | |
| Pr. naegleriophila | 4,096 (0) | 256 (7) | <4 (14) | 512 (10) | 4 (20) | 16 (14) | <4 (20) | <4 (13) |
| Pr. amoebophila | 32 (7) | 256 (0) | <32 (5) | 1,024 (3) | 64 (10) | 32 (0) | 128 (9) | 64 (3) |
| S. negevensis | 32 (14) | 128 (5) | 512 (0) | 64 (12) | 128 (12) | <32 (12) | 512 (8) | 256 (3) |
| P. strain Seine | 128 (10) | 512 (3) | 32 (12) | 16,384 (0) | 64 (19) | 64 (12) | <32 (19) | <32 (12) |
| W. chondrophila | 32 (20) | 128 (10) | 32 (12) | <32 (19) | 32,768 (0) | <32 (18) | 512 (13) | 128 (10) |
| N. hartmannellae | 32 (14) | 128 (0) | <32 (12) | 128 (12) | <32 (18) | 2,048 (0) | <32 (18) | <32 (11) |
| C. sequanensis | 32 (20) | 128 (9) | 128 (8) | 64 (19) | 256 (13) | <32 (18) | 32,768 (0) | 128 (8) |
| R. crassificans | 32 (13) | 128 (3) | 64 (3) | 64 (12) | 64 (10) | <32 (11) | 256 (8) | 256 (0) |
*Pr., Protochlamydia; P. a., Parachlamydia acanthamoebae; R., Rhabdochlamydia. Titers highlighted in gray, previously published in (9), are provided here because these data were used to calculate SDI between Pr. naegleriophila strain KNic and the other Chlamydia-related bacteria.