thus legionella pneumonias can be overlooked if special laboratory tests are not applied routinely , and surgical patients with head-and-neck cancer may be at high risk of nosocomial legionellosis because of the potential for pulmonary aspiration of contaminated water or orophyaryngeal microflora and/or frequent manipulation of the respiratory tract .
C0023241
legionella pneumonias
C0023240
legionellosis