Lactic dehydrogenase and beta-glucuronidase were assayed in tissue culture fluids and cellular lysates, respectively, from BHK-21/13S and Iota cell cultures infected with rabies virus. Activation of lysosomal enzymes was shown from the day 4 of infection on, without any indication of cytopathic effect.

We tested 606 specimens for cytomegalovirus infection. Fifty-two specimens were positive by conventional culture versus forty-three by pre-cytopathic effect detection. Twenty-nine specimens were positive by both methods. Because of toxicity, specimens should be set up on both conventional and shell vial culture systems to achieve maximum sensitivity.

The mechanism of human immunodeficiency virus type 1 (HIV-1) cytopathicity is poorly understood and might involve formation of multinucleated giant cells (syncytia), single-cell lysis, or both. In order to determine the contributions of the fusion domain to syncytium formation, single-cell lysis, and viral infectivity and to clarify the molecular details of these events, insertion mutations wer...

A 48-hour culture filtrate of Campylobacter jejuni was found to produce cytopathic effects on three human cell lines--that is, HeLa, MRC-5 and Hep-2. The cytopathic effects observed include cell rounding, loss of adherence and cell death after 24-48 h of incubation. Such morphological changes were observed with eight of the eleven strains of Campylobacter jejuni isolated from the blood/stools o...

Cytopathic changes induced in tissue cultures by a variety of enteroviruses have been observed in the light microscope (1-5). Furthermore, detailed analysis by means of electron microscopy has revealed the presence of intracytoplasmic crystalline viral aggregates (6-11) as well as alterations in the fine structure of cells infected by some of these agents (12). A preliminary study of type 9 E C...

Propagation of the agent of Marek's disease and production of a cytopathic effect in duck embryo fibroblast monolayer cultures was reported recently (21). A good correlation was obtained (14) between the occurrence of this cytopathic ef fect, the presence of herpes virus-like particles in infected cells, and the ability of these cells to reproduce Marek's disease in susceptible birds. Similar r...

The effective establishment of antiviral protection requires a coordinated interplay between the innate and adaptive immune system. Using osteopetrotic (op(-/-)) mice, this study investigated the influence of marginal zone macrophages in controlling and initiating a protective immune response against a cytopathic vs a non- or low-cytopathic virus. Despite the generation of potent adaptive immun...

Mathematical modeling was performed to test the extent to which cytopathic and noncytopathic T cell effector functions contribute to resolution of hepatitis B virus (HBV) infection in three acutely infected chimpanzees. Simulations based exclusively on cytopathic functions show a poor fit to the data and would require the destruction and regeneration of approximately 11 livers for clearance to ...