THE INCIDENCE OF PNEUMOCOCCUS TYPES AND THE RELIABILITY OF THE NEUFELD TYPING METHOD

Abstract
Of 305 specimens of sputum, 161 cases showed the same type by both Neufeld and the mouse methods; in 80 cases no type was obtained by Neufeld while from the mouse 1, 2 or even 3 types were isolated; in 61 cases the Neufeld was positive and the mouse not done. Therefore Neufeld test authors found to be 99.4% accurate when positive.