G. ANN HÉBERT, B.S.
To the editor: Several major points in Dr. Weinstein's editorial (1) should be clarified. The TATLOCK bacterium was never gram-positive (2), and, to my knowledge, gram-negative organisms do not become positive with age. The reverse often occurs, however, within some genera.
TATLOCK, HEBA, and the Pittsburgh bacterium (PPA) were not acid-fast in agar-culture smears stained with the Ziehl-Neelsen procedure for mycobacteria used by most microbiology laboratories (2, 3). Pasculle and colleagues (4) reported that PPA in tissue impression smears was not acid-fast when this procedure was used; however, he found that 25% to 50% of the cells retained carbol-fuchsin dye
HÉBERT GA. Legionella and the "New" Pneumonias. Ann Intern Med. ;93:374–375. doi: 10.7326/0003-4819-93-2-374
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Published: Ann Intern Med. 1980;93(2):374-375.
Infectious Disease, Pneumonia, Pulmonary/Critical Care.
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