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Biomedical subjects

L E Hanson

Publications and source records attributed to L E Hanson.

At least 73 records · Page 4Linked to original sources
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Natural pox and herpes as a dual virus infection in chickens.

A natural dual viral infection was confirmed in chickens of University of Illinois Poultry Farm by histopathologic, immunologic, and electron-microscopic examination of formalin-fixed tracheal tissue. Histopathologic examination of the tracheal mucosa revealed eosinophilic cytoplasmic inclusions characteristic of fowlpox and intranuclear inclusions suggestive of Marek's disease. Treatment of the formalin-fixed tracheal tissue with peroxidase and fluorescent-labeled antibody against Marek's disease virus revealed specificity of the reaction. Electron microscopy showed viral particles of two morphologic forms, i.e., pox and herpes. A single cell having dual infection with herpes virus in the nucleus and pox virus in the cytoplasm was also encountered on electron-microscopic examination.

Animals↗
PubMedDate not supplied

Pathogenesis of fowlpox in laying hens.

Egg production dropped after hens were inoculated with fowlpox virus originally isolated from a natural mild infection. The drop started from the 2nd week and continued to the 5th week after inoculation. All birds developed focal lesions at the site of inoculation, and some developed secondary lesions. The drop in individual birds was related to the severity of lesions. Birds challenged with fowlpox virus fifteen months after vaccination with pigeon pox vaccine were susceptible.

Animals↗