No evidence of horizontal infection in horses kept in close contact with dogs experimentally infected with canine influenza A virus (H3N8)

Table 3 Virus detection by egg culture and titre (log₁₀EID₅₀/200 μl) of nasal swab specimen collected daily from each animal

Days after inoculation	Dog 1	Horse 1	Dog 2	Horse 2	Dog 3	Horse 3
−1	-^a	-	-	-	-	-
0	-	-	-	-	-	-
1	-	-	≤1.3	-	-	-
2	2.0	-	1.5	-	-	-
3	≤1.0	-	2.2	-	≤1.0	-
4	-	-	-	-	≤1.0	-
5	-	-	2.8	-	1.7	-
6	-	-	-	-	-	-
7	-	-	-	-	-	-
8	-	-	-	-	-	-
9	-	-	-	-	-	-
10	-	-	-	-	-	-
11	-	-	-	-	-	-
12	-	-	-	-	-	-
13	-	-	-	-	-	-
14^a	-	-	-	-	-	-
15	Nil	-	Nil	-	Nil	-
16	Nil	-	Nil	-	Nil	-
17	Nil	-	Nil	-	Nil	-
18	Nil	-	Nil	-	Nil	-
19	Nil	-	Nil	-	Nil	-
20	Nil	-	Nil	-	Nil	-
21^c	Nil	-	Nil	-	Nil	-

^a <0.7 (No CIV haemagglutination activity was detected from four eggs inoculated with 1:10 dilution of nasal swab specimen).

ISSN: 1751-0147