Viruses of Entamoeba histolytica II. Morphogenesis of the Polyhedral Particle (ABRM 2 →HK-9)→HB-301 and the Filamentous Agent (ABRM) 2 →HK-9

Author:

Mattern Carl F. T.1,Diamond Louis S.1,Daniel Wendell A.1

Affiliation:

1. Laboratories of Viral Diseases and Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20014

Abstract

The intracellular development of two morphologically different amoebal viruses has been studied by electron microscopy. One is a polyhedral agent which was observed as early as 24 hr after infection in the perinuclear cytoplasm. Subsequently, cell lysis occurred and particles were found in large number bound to membranes of disrupted amoebae. Other particles were found in phagocytic vacuoles suggesting a possible portal of entry into amoebae. The other virus is a filamentous particle which is first seen in small clusters in the nucleus after 24 hr of infection. The number of particles increases such that by 72 hr massive whorls of particles occupy a substantial part of the nucleus. After rupture of the nuclear membrane, clusters of filaments are widely dispersed throughout the cytoplasm. Still later, the cytoplasmic membrane disintegrates and clusters of filaments are found extracellularly, but free of cell membranes. The morphology of these agents is discussed in comparison with a variety of plant, animal, and bacterial viruses.

Publisher

American Society for Microbiology

Subject

Virology,Insect Science,Immunology,Microbiology

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