Electron Microscopy of Bacterium tularense

The Morphology of Bacterium tularense.

Divergent views exist concerning the morphology of Bacterium tularense. McCoy and Chapin's (1912) original description depicted an apparently immotile, small, questionably encapsulated, pleomorphic organism occasionally presenting enlarged, irregular, and apparent involution fonns; sometimes with predominant large globular forms. Ohara, Kobayashi, and Kudo (1935) claimed to have demonstrated fl...

Electron Microscopy of Fowl Pox Virus

Some Observations on the Filtrability of Bacterium tularense.

Throughout our morphologic study of Bacterium tularense in liquid medium cultures we noted constantly the presence of very minute forms (Hesselbrock and Foshay, 1945). These appeared to grade downward in size from the most prevalent coccoid or ring forms of about 0.5 ,u in diameter to bodies so small that neither size nor shape was discernible. Such particles were never seen in uninoculated med...

Cultivation of Bacterium tularense in Simplified Liquid Media.

Since the isolation and cultivation of Bacterium tularense by McCoy and Chapin in 1912, and the demonstration of its obligate cystine requirement by Francis in 1922, little has been written concerning its nutritional requirements. Lufkin and Evenson (1936-7) reported "abundant growth" of Bacterium tularense in a "routine" blood culture in glucose beef infusion broth. It is clear that the organi...

Examination of Lung Parenchyma by Electron Microscopy

In this paper many of the principal struc­ture of the Moral Lung were studied with the help of Electron Microscopy. Detailed descrip­tion was given of Granular Pneumocytes, Membranous Pneumocytes, Macrophages, and Alveolar Capillaries. A discussion followed on the form and function of Granular Pneumo­cytes.  Acknowledgements  I am grateful to the Reza Shah Pahlavi Foundation for its generou...