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Biomedical subjects

M L Johnson

Publications and source records attributed to M L Johnson.

At least 397 records · Page 22Linked to original sources
PubMed1970

Scleroedema of Buschke. An uncommon cause of cardiomyopathy.

A case of scleroedema of Buschke involving skin and myocardium in a 69-year old woman is described. Widespread electrocardiographic abnormalities were present at the height of the disease, which improved over 18 months as the mucopolysaccharide infiltration of the skin cleared.

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PubMed1969

Listeria monocytogenes encephalitis associated with corticosteroid therapy.

A fatal case of Listeria monocytogenes septicaemia and encephalitis is described. The infection was associated with steroid therapy given for necrotizing cutaneous vasculitis. Agglutinating antibodies were not detectable in the patient's serum. Reasons for the failure of apparently appropriate antibiotic therapy are discussed.

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PubMed1966

Studies on the in vivo and in vitro multiplication of the LDH virus of mice.

In vivo analysis of the virus titer in various loci, 24 hr after infection, showed that a titer similar to that in the blood plasma was found in the ascitic fluid of Erlich ascites cancer-bearing mice, and in lymph nodes, spleen, and thymus, i.e. loci which contain macrophages as a common cell type. However, only in the lymph nodes and in the ascitic fluid did the increase in virus titer precede or parallel the increase in the plasma. The LDH virus titer in the plasma of X-irradiated mice was similar to that of control mice, eliminating radiation-sensitive cells but not macrophages as target cells of the virus. Electron microscopic observation of infected lymph node cells revealed the presence of two types of particles: one consisting of small densely stained annuli, about 25 mmicro in diameter and one of similar dense annuli with a halo extending the diameter to about 50 mmicro. Such particles were repeatedly observed within single or double membraned vesicles. In vitro, the LDH virus multiplied only in cultures of mouse peritoneal macrophages, maintained in medium 199 with 10% FBS. The virus titer could be maintained for at least 33 days, during eleven serial passages, involving an overall dilution factor of 10(11). These results corroborate the findings of Evans and Salaman, who used peritoneal macrophages maintained in Eagle's medium and 5 to 10% lamb serum. However, in the serial passage experiments reported here, the virus titer could only be maintained following trypsinization of each successive inoculum. The role of macrophages as the target cell for LDH virus multiplication in vivo is discussed.

Culture Techniques↗