An electron microscopic study of changes at the surface of influenza-infected cells as revealed by ferritin-conjugated antibodies

Virology ◽  
1966 ◽  
Vol 28 (3) ◽  
pp. 404-412 ◽  
Author(s):  
H. Duc-Nguyen ◽  
Harry M. Rose ◽  
Councilman Morgan
Keyword(s):  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Electron Microscopic ◽  
Infected Cells

Electron Microscopic Study of the Morphogenesis of Echovirus 23

1973 ◽  
Vol 31 ◽  
pp. 590-591
Author(s):  
C. M. Trant ◽  
R. M. Jamison
Keyword(s):  
Electron Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Post Infection ◽  
Glass Surface ◽  
Kidney Cells ◽  
Electron Microscopic ◽  
Monolayer Cultures ◽  
Infected Cells ◽  
Infectious Cycle

The cytopathology which accompanies the replication of Echovirus 23 in monkey kidney cells has been studied. Cells grown in monolayer cultures in glass bottles were infected with Echovirus 23 and incubated at 37°C. At varying intervals, cells were harvested for electron microscopy. Multiple embeddings of specimens at each interval post-infection were performed to confirm and extend the observations. It was noted that as the interval postinfection lengthened, individual infected cells rounded and detached from the surface of the monolayer. As the infectious cycle continued, virtually all cells in the bottle became detached. Accordingly, each infected bottle provided two specimens for electron microscopy; a) those free in the supernatent. fluid and b) those remaining on.the glass surface.

Electron-microscopic study of Herpesvirus macaca in human fibroblasts

1976 ◽  
Vol 22 (1) ◽  
pp. 101-104 ◽  
Author(s):  
Peter R. Graze ◽  
Phillip McGrath ◽  
Glenelle C. Washington ◽  
Ivor Royston
Keyword(s):  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Human Fibroblasts ◽  
Infectious Agent ◽  
Electron Microscopic ◽  
Virus Particles ◽  
Enveloped Virus ◽  
Negative Stain ◽  
Infected Cells ◽  
Myelin Figures

An electron microscopic study of the morphology of Herpesvirus macaca, a serologically distinct infectious agent isolated from the leukocytes of rhesus monkeys, was performed. WI-38 fibroblast monolayers were infected with the virus and examined 18 days later. The morphology of Herpesvirus macaca was, in general, typical of the herpesvirus group. Enveloped virus particles observed via negative-stain technique had a diameter of 145–155 nm. An inner capsid composed of hexagonal capsomeres had a diameter of 100–110 nm and surrounded a central core. While enveloped forms appeared to be present within the nuclei of infected cells, they were not found in the cytoplasm except within vacuolar structures. Associated changes were found in the morphology of infected cells, including intracytoplasmic myelin figures.

Electron microscopic study of Bluegill virus

1982 ◽  
Vol 28 (4) ◽  
pp. 398-402 ◽  
Author(s):  
Laurent Berthiaume ◽  
Jean Robin ◽  
Robert Alain
Keyword(s):  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Rna Viruses ◽  
Physical Appearance ◽  
Negative Staining ◽  
Electron Microscopic ◽  
Bunyaviridae Family ◽  
Infected Cells ◽  
Ultrathin Sections

Bluegill virus (BGV) grown in BF-2 cells was studied by negative staining and ultrathin sections of infected cells. Although BGV resembles bunyaviruses in gross physical appearance, it differs from this group in several important aspects. Thus, BGV cannot be classified as a member of the Bunyaviridae family and could be a representative of a novel family of enveloped RNA viruses.

Electron Microscopic Study of Hemadsorption on Vaccinia Virus Infected Cells

1977 ◽  
Vol 21 (10) ◽  
pp. 593-600
Author(s):  
Yasuo Saburi ◽  
Kenji Okuda ◽  
Toyozoh Takahashi ◽  
Ichiro Tadokoro
Keyword(s):  
Vaccinia Virus ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Electron Microscopic ◽  
Infected Cells

The Growth of Herpesvirus mulatto in Human Fibroblast

1974 ◽  
Vol 32 ◽  
pp. 244-245
Author(s):  
Glennelle Washington ◽  
Philip P. McGrath ◽  
Peter R. Graze ◽  
Ivor Royston
Keyword(s):  
Rhesus Monkey ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Peripheral Blood ◽  
Human Fibroblast ◽  
Rhesus Monkeys ◽  
Human Fibroblasts ◽  
Electron Microscopic ◽  
Specific Antisera ◽  
Peripheral Blood Leucocytes

Herpes-like viruses were isolated from rhesus monkey peripheral blood leucocytes when co-cultivated with WI-38 cells. The virus was originally designated rhesus leucocyte-associated herpesvirus (LAHV) and subsequently called Herpesvirus mulatta (HVM). The original isolations were from juvenile rhesus monkeys shown to be free of antibody to rhesus cytomegalic virus. The virus could only be propagated in human or simian fibroblasts. Use of specific antisera developed from HVM showed no relationship between this virus and other herpesviruses. An electron microscopic study was undertaken to determine the morphology of Herpesvirus mulatta (HVM) in infected human fibroblasts.

Further Observations on the Virus of Epizootic Diarrhea of Infant Mice. An Electron Microscopic Study

1967 ◽  
Vol 25 ◽  
pp. 110-111
Author(s):  
W. G. Banfield ◽  
G. Kasnic ◽  
J. H. Blackwell
Keyword(s):  
Electron Microscope ◽  
Infected Cell ◽  
Microscopic Study ◽  
Intestinal Epithelium ◽  
Ultrastructural Study ◽  
Osmium Tetroxide ◽  
Lead Citrate ◽  
Electron Microscopic ◽  
Virus Particles ◽  
Infected Cells

An ultrastructural study of the intestinal epithelium of mice infected with the agent of epizootic diarrhea of infant mice (EDIM virus) was first performed by Adams and Kraft. We have extended their observations and have found developmental forms of the virus and associated structures not reported by them.Three-day-old NLM strain mice were infected with EDIM virus and killed 48 to 168 hours later. Specimens of bowel were fixed in glutaraldehyde, post fixed in osmium tetroxide and embedded in epon. Sections were stained with uranyl magnesium acetate followed by lead citrate and examined in an updated RCA EMU-3F electron microscope.The cells containing virus particles (infected) are at the tips of the villi and occur throughout the intestine from duodenum through colon. All developmental forms of the virus are present from 48 to 168 hours after infection. Figure 1 is of cells without virus particles and figure 2 is of an infected cell. The nucleus and cytoplasm of the infected cells appear clearer than the cells without virus particles.

Cell Wall Ultrastructure in Three Strains of a Cariogenic Streptococcus

1971 ◽  
Vol 29 ◽  
pp. 338-339
Author(s):  
M. J. Kramer ◽  
Alan L. Coykendall
Keyword(s):  
Cell Wall ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Genetic Heterogeneity ◽  
Morphological Characteristics ◽  
Electron Microscopic ◽  
Dna Reassociation ◽  
Wall Ultrastructure

During the almost 50 years since Streptococcus mutans was first suggested as a factor in the etiology of dental caries, a multitude of studies have confirmed the cariogenic potential of this organism. Streptococci have been isolated from human and animal caries on numerous occasions and, with few exceptions, they are not typable by the Lancefield technique but are relatively homogeneous in their biochemical reactions. An analysis of the guanine-cytosine (G-C) composition of the DNA from strains K-1-R, NCTC 10449, and FA-1 by one of us (ALC) revealed significant differences and DNA-DNA reassociation experiments indicated that genetic heterogeneity existed among the three strains. The present electron microscopic study had as its objective the elucidation of any distinguishing morphological characteristics which might further characterize the respective strains.

A New Technique for the Light and Electron Microscopic Study of Individual Cerebro-Spinal Fluid Cells in a Mona Plane Layer

1976 ◽  
Vol 34 ◽  
pp. 362-363
Author(s):  
L.A. Dell
Keyword(s):  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Plane Layer ◽  
Ultrastructural Level ◽  
Spinal Fluid ◽  
Electron Microscopic Level ◽  
Electron Microscopic ◽  
Easy Method ◽  
Cell Pellet ◽  
A New Technique

A new method has been developed which readily offers the microscopist a possibility for both light and electron microscopic study of selected cells from the cerebrospinal fluid. Previous attempts to examine these cells in the spinal fluid at the ultrastructural level were based on modifications of cell pellet techniques developed for peripheral blood. These earlier methods were limited in application by the number of cells in spinal fluid required to obtain a sufficient size pellet and by the lack of an easy method of cellular identification between the light and electron microscopic level. The newly developed method routinely employs microscope slides coated with Siliclad and tungsten oxide for duplicate cytocentrifuge preparations of diagnostic spinal fluid specimens. Work done by Kushida and Suzuki provided a basis for our use of the metal oxide.

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