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Biomedical subjects

L W Johnson

Publications and source records attributed to L W Johnson.

At least 145 records · Page 8Linked to original sources
PubMed1969

Atmospheric aerosols.

Measurements of particle counts and size distributions of atmospheric aerosols have been made at various locations by use of an instrumented aircraft. The number of atmospheric particulates is related to the visibility.

Aerosols↗
PubMedDate not supplied

Lymphosarcoma in 10 New World Camelids.

We evaluated the medical information from 10 New World Camelids with lymphosarcoma. Additionally, tumor tissue from 5 animals was examined by electron microscopy for evidence of retroviral particles. Lymphosarcoma was the most common neoplasm of New World Camelids in our hospital. Both llamas and alpacas, from 4 months to 15 years of age, were affected. Emaciation (7 of 8) and palpable masses (9 of 10) were the most common physical examination abnormalities, and a left-shifted leukogram (7 of 7) and hypoalbuminemia (6 of 7) were the most characteristic clinicopathologic findings. Lymphosarcoma was diagnosed by lymph node aspirate (n = 2), biopsy (n = 2), peritoneal fluid analysis (n = 2), or necropsy (n = 4). The clinical course after recognition of the disease was usually short, with a median survival of 1 month (1 week to 3 months). Organs with neoplastic infiltrates commonly included lymph nodes (n = 8), liver (n = 8), kidneys (n = 6), and lungs (n = 5). No retroviral particles were detected ultrastructurally.

Animals↗