Filterable Viruses

Filterable Viruses

The Effect of Testicular Extract on Filterable Viruses

The Reynals factor promotes the pathogenic action of the viruses of herpes, vesicular stomatitis of horses, Borna disease, and vaccinia. The heightening of virulence is revealed in various ways. The effects of the viruses may be accentuated; or a weak strain converted into a strong one, as in the case of the F. strain of herpes virus; or the power acquired to infect resistant species or tissues...

A High Speed Vacuum Centrifuge Suitable for the Study of Filterable Viruses

1. A high speed centrifuge is described in which the speed is limited only by the strength of the material of which the rotor is made. It carries sixteen tubes, each of which conveniently accommodates 7 cc. of fluid. 2. The centrifuge operates in a very high vacuum and therefore requires only a small amount of driving energy. The arrangement has been found to eliminate the possibility of produc...

Growth and Persistence of Filterable Viruses in a Transplantable Rabbit Neoplasm

Virus III and vaccine virus multiply in a transplantable rabbit tumor of epithelial origin; are carried along with the tumor through an indefinite number of transplants; and despite an immunity developed by the rabbit host survive longer in the tumor than when injected into the testicles of normal rabbits.

Filterable Virus Diseases in Man

Laenniec had written his great work on Auscultation: a work the result of his own elaborate researches, and is the basis of our knowledge of disease of the lungs and heart in the living; even supplying the nomenclature for the pheniomena observed which is current to this day. As has been said of him: "He unlocked the secrets of the heart and lungs, and by his great researches made a thorough in...