Table 1.

sRNA predictions categorized by nucleotide size

Predicted sRNA nucleotide size
Rickettsia	30–100	101–200	201–300	301–400	401–500	500–550	Total
Ancestral group
R. bellii OSU	33	55	6	5	1	0	100
R. bellii RML	39	43	13	3	2	0	100
R. canadensis	22	14	7	1	1	2	47
Typhus group
R. prowazekii Breinl	8	11	5	2	0	0	26
R. prowazekii Madrid E	8	11	5	2	0	0	26
R. typhi	4	5	3	2	1	0	15
Transitional group
R. akari	46	43	19	5	1	2	116
R. felis	75	80	25	6	2	0	188
Spotted fever group
R. rickettsii Iowa	53	49	13	8	1	1	125
R. rickettsii Sheila Smith	56	54	17	8	0	0	135
R. africae	62	67	19	10	3	2	163
R. heilongjiangensis	54	69	12	9	3	1	148
R. conorii	62	59	15	4	3	3	146
R. japonica	67	72	22	12	4	1	178
R. massiliae	64	66	19	6	2	0	157
R. peacockii	79	74	17	9	8	4	191

SIPHT predicted sRNAs categorized by both rickettsial groups and nucleotide size