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PubMed1976

Growth of Physarum gyrosum on agar plates and in liquid culture.

The physical and nutritional requirements of the antibiotic-producing slime mold Physarum gyrosum were examined to develop a liquid medium for this myxomycete. Liquid culture is desired to expedite a useful scale of production of antibiotic materials for ease of isolation and structure study. Culture conditions were selected to favor antibiotic production rather than maximum growth. The medium devised consisted of 0.010 M potassium phosphate buffer (pH 6.0), 2% bakers' yeast, and 0.2% glucose and was supplemented with either 10(-7) M hemoglobin (preferred) or 2.0 ml of live Escherichia coli per 100 ml of culture medium grown to a steady-state population in nutrient broth. The slime mold, which contained some E. coli carried along with the inoculum, was allowed to grow as a surface plasmodium at 20 degrees C in the dark with weekly subculturing for stocks or for 10 days for antibiotic production. P. gyrosum produced the same antibiotic materials when grown in liquid medium as it did when grown on agar plates. A seeded plate disk assay against Bacillus cereus was employed to follow antibiotic activity.

Anti-Bacterial Agents↗
PubMed1964

EXPERIMENTAL PRIMARY CUTANEOUS COCCIDIOIDOMYCOSIS IN THE MONKEY.

Converse, John L. (U.S. Army Biological Laboratories, Fort Detrick, Frederick, Md.), Steven P. Pakes, Ernest M. Snyder, and Merida W. Castleberry. Experimental primary cutaneous coccidioidomycosis in the monkey. J. Bacteriol. 87:81-85. 1964.-Primary cutaneous coccidioidomycosis was studied in the monkey (Macaca mulatta) to find a suitable strain of Coccidioides immitis for use as a viable vaccine. Intradermal inoculation (medial surface of the right forearm) produced more severe vaccination reactions (draining vaccination site and axillary lymph node hypertrophy) than did subcutaneous injection. A subcutaneous vaccine dose of 10 arthrospores resulted in less reaction than a 100-spore dose. Moreover, dissemination beyond the regional lymph nodes did not occur after injection of ten spores of even the most virulent strains of C. immitis. Two of the five strains tested (Silveira, M-11, D-76, Cash, and a colonial isolate from Cash designated CW1) exhibited very mild vaccination reactions and appeared to have been cleared from the tissues upon necropsy at 10 months postvaccination. These two strains (Cash and CW1) appear promising for further immunological studies with a viable vaccine.

Animals↗
PubMed1964

SUBCUTANEOUS INFECTION DUE TO ASPERGILLUS TERREUS.

A case of subcutaneous infection by Aspergillus terreus is reported. Pus from the lesion contained spherules which did not appear to be related to the aspergillus. The nature of the spherules is discussed.

Aspergillosis↗