Serial passage of Heliothis zea singly embedded nuclear polyhedrosis virus in a homologous cell line |
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Authors: | Ken-ichiro Yamada Kenneth E Sherman Karl Maramorosch |
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Institution: | Waksman Institute of Microbiology, Rutgers-The State University, P.O. Box 759, Piscataway, New Jersey 08854 USA |
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Abstract: | This paper describes the replication and serial passage of Heliothis zea nuclear polyhedrosis virus (NPV) in a H. zea cell line. It was demonstrated that long-term serial passages of the H. zea NPV in homologous host cell culture decreased both the total number of polyhedral inclusion bodies (PIBs) produced and the infectivity of the supernatant as measured by TCID50. The growth curve indicated that infectious material was released from cells 24 hr postinfection (p.i.) and approached a maximal titer 3 days p.i. The kinetics of H. zea NPV decay at 4°, 27°, and 37°C were determined. Infectivity was not detected after 3 weeks at 37°C, but approximately 103.5 TCID50/ml activity was still present after 3 and 8 weeks storage at 27° and 4°C, respectively. Electron microscopy confirmed the presence of single embedded virions in the inoculated cells. |
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Keywords: | Heliothis zea nuclear polyhedrosis virus polyhedral inclusion bodies |
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