Table 1.

Infected animals’ clinical symptoms and seroconversion

Group	Transmission route	No. of positive animals/no. tested
		Clinical signs*		Seroconversion
		Infected	Contacted	Infected	Contacted
Dog** to cat	AE	4/4	2/2	4/4	2/2
Dog to ferret	AE		0/2		0/2
Cat** to cat	DC	2/2	2/2	2/2	2/2
Ferret*** to ferret	DC	3/3	0/3	3/3	2/3

AE, airborne exposure; DC, direct contact.

^*Only cats exposed to the infected dogs and cats with nasal challenge and direct contact, respectively, showed sneezing, coughing, and nasal discharge, while the exposed ferrets did not.

^**The CIV H3N2 infected dogs and cats via intranasal route showed sneezing, coughing, and nasal discharge.

^***The CIV H3N2 infected ferrets via intranasal route showed only sneezing.