Comparative study of a rabbit model of spinal tuberculosis using different concentrations of Mycobacterium tuberculosis

Table 1 Animal Survival in the five groups

Groups (n)	Day of model establishment	4 weeks post model establishment	8 weeks post model establishment	12 weeks post model establishment	Survival rate (%)
Experimental 1 (n = 10)	9	9	9	9	100
experimental 2 (n = 10)	10	9	8	8	80
experimental 3 (n = 10)	10	6	3	3	30
Control group (n = 10)	9	9	9	9	100
Blank group (n = 2)	2	2	2	2	100

Table 2 Positive post-operative image changes in the three groups of experimental animals at 8 and 12 weeks

Results	Experimental 1		Experimental 2		Experimental 3
	8 weeks	12 weeks	8 weeks	12 weeks	8 weeks	12 weeks
X-ray
Intervertebral space changes	3	4	5	6	2	3
Osteophyte	1	2	4	4	2	3
CT
Osteophyte	2	3	5	8	3	3
Destruction of the vertebral body	4	4	6	8	3	3
Abscess	0	0	0	0	0	0
3-dimensional CT
Intervertebral space changes	4	4	6	8	3	3
Osteophyte	2	3	5	8	3	3

CT: Computed tomography.