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AMA Arch Intern Med. 1952;89(2):258-269. doi:10.1001/archinte.1952.00240020090006.
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SEVERE sporadic "viral" pneumonias have been cited as often giving rise to diagnostic and therapeutic problems.1 During recent years previously unidentified diseases have been found to present themselves as pneumonia of an "atypical" nature. The advent of newer antibiotics to which some of these diseases readily respond has accentuated the importance of accurate diagnosis.

Recently at an Army hospital in Kobe, Japan, there occurred an explosive outbreak of "atypical" pneumonia—sharply localized to patients (almost all evacuees from Korea) and members of the staff of the installation. This outbreak afforded an opportunity to characterize the natural history of a form of "patchy" pneumonia, to note certain abnormal laboratory findings, and to evaluate therapy with an antibiotic usually effective against several such pneumonias.

I. MATERIAL  This study is based on 45 patients whose conditions were related clinically, roentgenographically, epidemiologically, and by laboratory findings. Of these, 7 were physicians, 5 were nurses,


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