Bacterial species associated with interdigital phlegmon outbreaks in Finnish dairy herds

BMC Veterinary Research

Table 4 The multinomial logistic regression model for the association of various disease categories and presence of bacteria in outbreaks of interdigital phlegmon in Finnish dairy herds

Disease categories	n	RRR^a	p-value	95% CI^b
Control cows	59	Base outcome
Acute IP	36
Dichelobacter nodosus		2.1	0.36	0.44–9.88
Fusobacterium necrophorum		74.9	< 0.01	14.31–391.71
Porphyromonas levii		1.7	0.62	0.22–12.43
Prevotella melaninogenica		0.7	0.80	0.04–12.67
Treponema^c		3.8	0.11	0.75–19.33
Trueperella pyogenes		10.8	0.06	0.91–127.48
Constant^d		0.04	< 0.01	0.01–0.15
Healing IP	33
Dichelobacter nodosus		0.4	0.26	0.08–1.95
Fusobacterium necrophorum		58.4	< 0.01	10.29–332.00
Porphyromonas levii		1.1	0.96	0.13–8.73
Prevotella melaninogenica		3.0	0.44	0.19–47.02
Treponema^c		2.2	0.40	0.35–13.76
Trueperella pyogenes		22.4	0.01	2.01–249.04
Constant^d		0.08	< 0.01	0.02–0.25

^aRRR = relative risk ratio
^b95% CI = 95% confidence interval
^cTreponema group 2 and 3
^dConstant is a baseline relative risk for each outcome
The disease categories were control cows, acute interdigital phlegmon (Acute IP) and IP in a healing stage (Healing IP). The herd had no effect on the results. In this model, the number of the hoof samples is 128

ISSN: 1746-6148