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Infect Immun. 1975 November; 12(5): 1070-1077

Viral replication and interferon production in fetal and adult ovine leukocytes and spleen cells.

C R Rinaldo Jr, J C Overall Jr and L A Glasgow

ABSTRACT

Peripheral blood leukocyte and spleen cell cultures derived from adult sheep and from third-trimester (107 to 145 days of gestation) and second-trimester (70 to 98 days of gestation) fetal lambs were examined for their ability to support viral replication and to produce interferon. Bluetongue virus, Herpesvirus hominis type 2, and Chikungunya virus failed to replicate in either leukocyte or spleen cell cultures derived from adult ewes or in cultures from second- or third-trimester fetal lambs. Similarly, peripheral blood leukocytes from adult sheep or third-trimester fetal lambs did not support the replication of Semliki Forest virus, vesicular stomatitis virus, Newcastle disease virus, or vaccinia virus. No major differences were observed in the ability of fetal and adult leukocytes to produce interferon in response to viral infection. In contrast, mean interferon titers induced by bluetongue virus, H. hominis type 2, and Chikungunya virus in spleen cells from second-trimester fetuses were 4- to 10-fold greater than those induced in spleen cells from adult ewes. Variations in interferon levels induced on separate occasions with cells from the same donor age group were observed. The antiviral substance induced in both the fetal and adult cell cultures fulfilled the usual criteria for characterization as interferon.

Infect Immun. 1975 November; 12(5): 1070-1077






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