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Abstract
Human adenovirus type 5 (hAd5) vectors have been demonstrated to be useful vehicles for gene expressions in animals. However, it has not been reported whether hAd5 transduction might be hampered in the sera of livestock animals in Republic of Korea. We collected 205 samples of livestock animals, such as pig (n=84), cattle (n=84), and goat (n=37) in Korea. The neutralizing antibody (NAb) titers to hAd5 virus were less than 15 in most of samples. Only 8% of goat samples had a NAb titer of 15 or 30. Thus, we showed that hAd5 virus was not neutralized in sera from cattle, pig, and goat, and suggest that the hAd5 vector could be used for the effective delivery of vaccines or proteins in livestock animals in the field.
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Figure 1.
Distribution of serum samples from cattle, pig and goat according to neutralizing antibody to human adenovirus type 5 virus (hAd5). The virus neutralizing antibody titer was estimated from the reciprocal of the highest serum dilution that completely prevented the development of a cytopathic effect (CPE). The percent of serum samples that display hAd5-specific neutralization titers of <15, 15∼50, 50∼100, and >100 are shown. The rabbit polyclonal antibody to adenovirus type 5 virus (Abcam ab6982, USA) was used as a positive serum control.
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