J Vet Sci.  2007 Mar;8(1):45-49. 10.4142/jvs.2007.8.1.45.

Sero-survey on Aino, Akabane, Chuzan, bovine ephemeral fever and Japanese encephalitis virus of cattle and swine in Korea

• Lim SI
• Kweon CH
• Tark DS
• Kim SH
• Yang DK

• KMID: 1104235
• DOI: http://doi.org/10.4142/jvs.2007.8.1.45

Abstract

Vector-borne arboviruses produce mild to severe symptoms in domestic animals. Bovine ephemeral fever (BEF), Akabane, Aino, and Chuzan virus have been primarily attributed to reproductive disorders or febrile diseases in cattle, and Japanese encephalitis virus (JEV) is mainly associated with reproductive failures in swine. We investigated antibody titers from domestic swine against four bovine arboviruses (BEF, Akabane, Aino, and Chuzan virus) and from cattle against JEV in Korea. While the positive rates for Akabane and BEF were 37.4% and 15.7%, the positive incidence of Chuzan and Aino were relatively low, with positive rates of 3.04% and 0.4%, respectively, based on a virus neutralization assay. Antibody titers against more than one virus were also frequently detected in domestic swine. The incidence of JEV was 51.3% among domestic cattle. In addition, one positive case was detected in the thoracic fluids from 35 aborted calves, based on the hemagglutination inhibition test. Our results indicate that swine are susceptible hosts of bovine arboviruses without showing clinical symptoms in a natural environment. Moreover, we confirmed that JEV could be associated with reproductive failure in pregnant cattle, as were other vector-borne bovine arboviruses assessed in this study.

Keyword

arboviral infection; cattle; sero-incidence; swine

MeSH Terms

Animals
Antibodies, Viral/blood
Cattle
Cattle Diseases/*epidemiology/*virology
Encephalitis Virus, Japanese/*immunology
Encephalitis, Japanese/blood/epidemiology/*veterinary/virology
Ephemeral Fever/blood/*epidemiology/virology
Ephemeral Fever Virus, Bovine/*immunology
Hemagglutination Tests
Incidence
Korea/epidemiology
Neutralization Tests
Swine
Swine Diseases/*epidemiology/*virology

Figure

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  Fig. 1 Sero-positive rates against Aino, Akabane, Chuzan, and BEF virus on fifteen swine farms.

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  Fig. 2 Incidence of virus neutralization (VN) titers of 130 positive sera in swine sera against Aino, Akabane, Chuzan, and BEF virus.

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  Fig. 3 Distribution of HI titers against JEV in positive bovine sera.

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