1990 Volume 43 Issue 11 Pages 779-783
Seven hundred sixty sera collected from fattening and breeding pigs aged 4 months or over in 17 prefectures in 1976, 1982, and from 1986 to 1989 were tested forvirus neutralizing antibody (VNAb) against porcine adenovirus (PAV) type 1 (25R strain), type 2 (A47 strain), type 3 (6618 strain), type 4 (Mtinchen strain) and HNF70 strain (type 5).
In calender years, the positive rates of VNAb against types 1, 2, 3, 4, and HNF70 strain were 12.6-49.3%(geometric mean: 43.1%), 52.5-66.7%(63.7%), 51.3-93.3%(70.9%), 0-43.8%(27.1%) and 75.0-95.0%(87.1%), respectively. The positive rates of VNAb against types 1, 2, 3, 4 and HNF70 strain of PAV in each prefecture were shown to be about similar in value in the same district. These findings suggested strong transmission of PAV in pigs. The positiverate of VNAb against the HNF70 strain for sera from the 7 districts of Hokkaido, Tohoku, Kanto, Koshinetsu, Kinki, Kyusyu and Okinawa were above 80%. The positive rate of VNAb over 80% of type 3 was shown in the districts of Hokkaido, Tohoku, Chubu, Chugoku, Shikoku and Kyusyu, type 2 in the districts of Chubu and Kinki, and type 1 in the Chubu district. A positive rate of over 80% of VNAb against type 4 was not found in any district.
From these findings it was proven that various types of PAV have widely infected pigs in Japan.
