. Medical diagnosis for the student and practitioner. in monkeys by theuse of immune serum, but on the individual infected the disease confersabsolute immunity. *Flexner and Noguchi: Jour. Exper. Med., Vol. X, 108, 1913. f Various observers have reported what they have believed to be the causativemicroorganisms, notably Geirsvold who reported a diplococcus and, very recently, E. who reports a streptococcus. At the present time, the virus of Flexner andXoguchi only is generally accepted as capable of producing the typical cord changes. % Severe winter epidemics have been reported but
. Medical diagnosis for the student and practitioner. in monkeys by theuse of immune serum, but on the individual infected the disease confersabsolute immunity. *Flexner and Noguchi: Jour. Exper. Med., Vol. X, 108, 1913. f Various observers have reported what they have believed to be the causativemicroorganisms, notably Geirsvold who reported a diplococcus and, very recently, E. who reports a streptococcus. At the present time, the virus of Flexner andXoguchi only is generally accepted as capable of producing the typical cord changes. % Severe winter epidemics have been reported but are most 1090 MEDICAL DIAGNOSIS The virus may remain in the nasopharynx for at least five months afterrecovery, but it is seldom infective after six weeks. Morbid Anatomy.—Contrary to our older conceptions it is actually apolio-myelo-meningo-encephalitis, with predominant destructive lesions inthe ganglion cells of the anterior horns of the spinal cord which results invarying degrees of degeneration of the components of the lower motor.
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