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Biomedical subjects

F A Murphy

Publications and source records attributed to F A Murphy.

At least 109 records · Page 6Linked to original sources
PubMed1971

Effect of antilymphocyte serium on tacaribe virus infection in infant mice.

Tacaribe virus, a member of the arenovirus group, was demonstrated to have similarities in pathogenesis to the prototype virus of this group, lymphocytic choriomeningitis (LCM) virus. Treatment with antilymphocyte serum (ALS) doubled the survival time of mice neonatally infected with a lethal dose of Tacaribe virus. Twenty-one per cent of ALS-treated infected animals survived more than 30 days. All animals had recoverable virus in brains and serum for the duration of life, and there was no difference between virus growth curves of ALS-treated and control animals. No neutralizing or complement-fixing antibodies were present in infected animals at time of death, with the exception of one long-surviving ALS-treated animal. Certain differences between infections of mice with LCM and Tacaribe viruses were apparent. Tacaribe virus pathogenicity decreased with increasing mouse age, and earlier infection and a more prolonged course of ALS treatment than was needed for LCM virus were necessary to achieve increased survival. Histopathological changes observed in Tacaribe virus-infected control mice were focal choroiditis and focal cerebellar necrosis; these changes were not seen in asymptomic infected mice during the period of transient protection by ALS.

Journal Article↗
PubMed1970

Marburg virus.

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Africa↗
PubMed1970

Experience with electron microscopy in the differential diagnosis of smallpox.

The usefulness of negative-contrast electron microscopy in the rapid differential diagnosis of poxvirus and herpesvirus exanthems is described in this study of 301 specimens from patients with vesicular exanthematous diseases. Specimens from patients with smallpox, various forms of vaccination complications, varicella, zoster (shingles), and herpes simplex are included in this evaluation. Electron microscopy, when applied to the study of lesion material, was found to be more sensitive than the classical techniques of virus isolation in the diagnosis of both poxvirus and herpes/varicella virus infections. However, since specific identification of a virus within a group cannot be made morphologically by electron microscopy, it is recommended that both electron microscopy and virus isolation methods be employed for the routine differential diagnosis of vesicular exanthematous diseases in the reference diagnostic laboratory.

Animals↗
PubMed1970

Arenoviruses in Vero cells: ultrastructural studies.

Thin-section electron microscopy was carried out on Vero green monkey kidney cell cultures infected with some viruses of the newly constituted arenovirus group. Junin, Machupo, Amapari, Pichinde, Parana, Tamiami, and Latino viruses were morphologically identical and indistinguishable from lymphocytic choriomeningitis virus, the prototype virus of the group. Virus particles were round, oval, or pleomorphic, 60 to 280 nm in diameter, and matured via budding from plasma membranes. Most characteristically, particles contained various amounts of homogeneous, 20- to 25-nm, dense granules; these granules in large masses also formed distinctive intracytoplasmic inclusions. In negative-contrast preparations from infected Vero cell culture supernatant fluids, several of the viruses appeared as pleomorphic membrane-bound forms with rather pronounced surface projections. Most particles were between 90 and 220 nm in diameter, although some reached 350 nm in their longest dimension. Internal structure was not resolved by negative-contrast electron microscopy. All observations supported the current delineation of a distinct arenovirus group.

Animals↗
PubMed1970

Two African viruses serologically and morphologically related to rabies virus.

Lagos bat virus and an isolate from shrews (IbAn 27377), both from Nigeria, were found to be bullet-shaped and to mature intracytoplasmically in association with a distinct matrix. They were related to, but readily distinguishable from, rabies virus and each other by complement fixation and neutralization tests. The three viruses, including rabies, form a subgrouping within the rhabdoviruses.

Animals↗