Similarity in the Structure of Cytoplasmic Polyhedrosis Virus, Leaf hopper A Virus and Fiji Disease Virus Particles

Intervirology ◽  
1982 ◽  
Vol 18 (4) ◽  
pp. 203-208 ◽  
Author(s):  
Takayuki Hatta ◽  
Richard I.B. Francki
Keyword(s):  
Disease Virus ◽  
Cytoplasmic Polyhedrosis Virus ◽  
Virus Particles ◽  
Leaf Hopper ◽  
Fiji Disease Virus ◽  
Polyhedrosis Virus

ON THE MORPHOLOGY AND DEVELOPMENT OF INSECT CYTOPLASMIC-POLYHEDROSIS VIRUS PARTICLES

1965 ◽  
Vol 11 (3) ◽  
pp. 497-501 ◽  
Author(s):  
F. T. Bird
Keyword(s):  
Virus Particle ◽  
Inner Core ◽  
Cytoplasmic Polyhedrosis Virus ◽  
Virus Particles ◽  
Early Stages ◽  
Polyhedrosis Virus

The cytoplasmic-polyhedrosis virus particle is an icosahedron about 68 mμ in diameter. It consists of a capsid, made up of two concentric rings, and an inner core. The capsid has 12 projections.Large masses consisting mostly of the capsids of virus particles develop in the cytoplasm of gut cells infected with cytoplasmic-polyhedrosis virus. Cores of the virus particles are found on the outer surfaces of these masses or in material adjacent to them. The complete virus particle is assembled just before it is enveloped by protein and incorporated into a developing polyhedron.Granules, tentatively identified as lysosomes, increase in number and size during the early stages of infection. Other granules and bodies observed in the gut cells are described.

A CYTOPLASMIC POLYHEDROSIS OF HYALOPHORA CECROPIA (LINNAEUS)

1965 ◽  
Vol 11 (4) ◽  
pp. 703-707 ◽  
Author(s):  
W. A. Smirnoff
Keyword(s):  
Electron Microscope ◽  
Viral Infection ◽  
Cytoplasmic Polyhedrosis Virus ◽  
Virus Particles ◽  
Protein Mass ◽  
Viral Particles ◽  
Polyhedrosis Virus ◽  
Hyalophora Cecropia

Hyalophora cecropia (Linnaeus) is susceptible to infection by a cytoplasmic polyhedrosis virus. Electron microscope studies showed spherical viral particles known as "cores" which remain in groups of 12 to 17 subunits. The virus particles were embedded in a protein mass located in craters of the polyhedra. Larvae of the first, second, and third instars were more susceptible to viral infection than later instars. However, up to 50% of the larvae of later instars sometimes survived. The larvae of subsequent instars and the pupa were very resistant and periodic injections of strong dosages of virus material produced no ill effect. In general, larvae infected by this cytoplasmic virus shrank to less than half normal size before death.

Intracellular arrays of Fiji disease virus particles with five-fold symmetry

Micron (1969) ◽  
1981 ◽  
Vol 12 (4) ◽  
pp. 349-352
Author(s):  
T. Hatta ◽  
R.I.B. Francki ◽  
R.W. Horne
Keyword(s):  
Disease Virus ◽  
Virus Particles ◽  
Fiji Disease Virus

THE DEVELOPMENT OF A CYTOPLASMIC POLYHEDROSIS VIRUS IN THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEMENS)

1966 ◽  
Vol 12 (2) ◽  
pp. 337-339 ◽  
Author(s):  
F. T. Bird
Keyword(s):  
Choristoneura Fumiferana ◽  
Spruce Budworm ◽  
Similar Type ◽  
Dense Material ◽  
Envelop Virus ◽  
Cytoplasmic Polyhedrosis Virus ◽  
Virus Particles ◽  
Polyhedral Shape ◽  
Polyhedrosis Virus

Virus particles and polyhedra develop in patches of viroplasm in the cytoplasm of mid-gut cells of larvae of the spruce bud worm, Choristoneura fumiferana (Clemens). Normal components of the cell disintegrate as the disease spreads, and either they completely disappear or mitochondria, ribosomes, and other components form rings in the outer regions of the cell.Polyhedra develop from dense material which appears to attract and envelop virus particles. Only complete particles with large prominent cores are incorporated into growing polyhedra. As the polyhedra mature, they assume a smooth outline and polyhedral shape and either cease to attract virus particles, or their size is limited by the amount of polyhedron protein and numbers of complete virus particles produced in the cell. Although most of the virus particles not incorporated into polyhedra appear incomplete, the large masses of incomplete particles formed in a similar type of disease of another insect were not found in bud worm larvae.

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