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Journal of bacteriology1966; 92(1); 250-257; doi: 10.1128/jb.92.1.250-257.1966

Biological and morphological aspects of the growth of equine abortion virus.

Abstract: Darlington, R. W. (St. Jude Children's Research Hospital, Memphis, Tenn.), and C. James. Biological and morphological aspects of the growth of equine abortion virus. J. Bacteriol. 92:250-257. 1966.-The growth of equine abortion virus (EAV) was studied by bioassay and electron microscopy in L-cell monolayer and suspension cultures, and in HeLa and BHK 21/13 cell monolayers. Results of virus assay (plaque-forming units) indicated that production of cell-associated virus (CAV) began at 6 to 9 hr after infection in all of the cell strains used. Virus release occurred 1 to 2 hr later. By 15 to 20 hr after infection, the amount of released virus (RV) equaled or surpassed that of CAV in all cells other than the HeLa cells, where the amount of RV did not equal CAV until 48 hr after infection. Electron microscopy of infected cells revealed no differences in the morphology of virus development in any of the cells used. Developing virus particles were first detected in cell nuclei at 9 hr after infection. At 12 hr, virus particles could be seen budding from the inner nuclear envelope. Budding into cytoplasmic vacuoles was not seen. Budding virus, virus in cytoplasmic vacuoles, and extracellular virus were all approximately 145 mmu in diameter, and were indistinguishable morphologically. These results indicated that EAV is quite similar to herpes simplex virus with respect to growth and morphology, and that the inner nuclear membrane is the principal site of virus envelopment.
Publication Date: 1966-07-01 PubMed ID: 5941279PubMed Central: PMC276222DOI: 10.1128/jb.92.1.250-257.1966Google Scholar: Lookup
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  • Journal Article

Summary

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This research article explores the growth patterns and characteristics of the equine abortion virus (EAV) using bioassay and electron microscopy in various cell cultures. The results indicate EAV shows significant resemblance to the herpes simplex virus in terms of growth and morphology.

Methodology

  • The study used L-cell monolayer and suspension cultures, as well as HeLa and BHK 21/13 cell monolayers as its subjects.
  • It leveraged both bioassay and electron microscopy techniques to investigate the growth of the equine abortion virus (EAV).

Results and Findings

  • The production of cell-associated virus (CAV) began between 6 to 9 hours after infection in every cell strain used in the study.
  • The release of the virus was said to occur 1 to 2 hours after the initiation of the formation of the CAV.
  • The study found that by 15 to 20 hours after infection, the amount of released virus (RV) was either equal to or greater than CAV in all cell strains except HeLa cells. For HeLa cells, RV did not equal CAV until 48 hours post-infection.
  • The electron microscopy technique helped the researchers observe the development of virus particles within the cell nuclei. The first signs of developing virus particles were noticed at about 9 hours post-infection.
  • Around the 12th hour, the virus particles were seen budding from the inner nuclear envelope. Bud-offs into cytoplasmic vacuoles were not observed.
  • All the virus forms – budding, within cytoplasmic vacuoles, and extracellular were approximately 145 nm in diameter and shared the same morphological characteristics.

Conclusions

  • The outcomes of this research point towards the strong resemblance of EAV to the herpes simplex virus in relation to its growth attributes and morphological characteristics.
  • This study has deduced that the primary site for virus envelopment is the inner nuclear membrane.

Cite This Article

APA
Darlington RW, James C. (1966). Biological and morphological aspects of the growth of equine abortion virus. J Bacteriol, 92(1), 250-257. https://doi.org/10.1128/jb.92.1.250-257.1966

Publication

ISSN: 0021-9193
NlmUniqueID: 2985120R
Country: United States
Language: English
Volume: 92
Issue: 1
Pages: 250-257

Researcher Affiliations

Darlington, R W
    James, C

      MeSH Terms

      • Animals
      • HeLa Cells
      • Herpesviridae / growth & development
      • Humans
      • In Vitro Techniques
      • L Cells
      • Mice
      • Microscopy, Electron

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