we observed that ( a ) the prognosis was identical whether a bacteriologic diagnosis was made or not , ( b ) the gram stain , an inexpensive procedure , was as contributive for bacteriologic diagnosis as quantitative sputum culture , diagnosis as ( c ) blood cultures were poorly contributive in patients without severe infections , and ( d ) alveolar densities were associated with a bacterial infection in 90 percent of the cases of known etiology .
C3714514
infections
C0004623
bacterial infection