Parameterization of the duration of infection stages of serotype O foot-and-mouth disease virus: an analytical review and meta-analysis with application to simulation models | Veterinary Research, a journal on Animal Infection

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Table V.

Weibull model (shape parameter p = 5.14) fitted for the duration of the incubation period, based on FMDV-transmission experiments using 221 animals in 17 trials conducted between 1967 and 2007.

Variable	Category	Time ratio	Coefficient (β)	95% CI of β	p value
Experimental animal	Cattle
Experimental animal	Small ruminants	2.32	0.84	0.71, 0.97	< 0.01
Type of contact	Direct
Type of contact	Indirect	1.62	0.48	0.29, 0.68	< 0.01
Donor specie	Same specie
Donor specie	Different specie	1.86	0.62	0.45, 0.78	< 0.01
FMDV topotype	Pan Asia
	Euro-SA (European strains)	2.12	0.75	0.58, 0.91	< 0.01
	Euro – SA (South American strains)	5.16	1.64	1.25, 2.03	< 0.01
Clinical signs	Fever
Clinical signs	Generalized	1.28	0.25	0.13, 0.37	< 0.01
FMD laboratory	Pirbright
	Plum Island	0.31	−1.17	−1.5, −0.85	< 0.01
	PanAftosa	0.16	−1.83	−2.36, −1.3	< 0.01
Interaction terms
Experimental animal × species as donor	Small ruminants exposed to a different species	0.35	−1.06	−1.25, −0.87	< 0.01
Type of contact × topotype	Indirect × Euro – SA (European strains)	0.25	−1.4	−1.62, −1.17	< 0.01
	Intercept		1.07	0.96, 1.18	< 0.01