Images in order of appearance:
(...beginning with the first image, footnote 2.)
5. CDC/ Dr. George P. Kubica. #5789
Caption: "Under a magnification of 1000X, this photomicrograph of an acid-fast, Ziehl-Neelsen stained specimen, reveals the presence of a number of Mycobacterium tuberculosis bacteria." PHIL public domain image, 1979. Accessed May 11, 2022. https://phil.cdc.gov/Details.aspx?pid=5789.7. CDC/ Ronald Smithwick. #2189,
Caption: "Under a magnification of 1000X, this photomicrograph of a sputum smear, processed using a fluorescence acid-fast staining method that implements acridine orange fluorescent dye as a counterstain, revealed the presence of a Mycobacterium tuberculosis bacterium." PHIL public domain image. 1971. Accessed May 11, 2022. https://phil.cdc.gov/Details.aspx?pid=2189.8. CDC/ Dr. George P. Kubica. #5789
Caption: "Under a magnification of 1000X, this photomicrograph of an acid-fast, Ziehl-Neelsen stained specimen, reveals the presence of a number of Mycobacterium tuberculosis bacteria." PHIL public domain image. 1979. Accessed May 11, 2022. https://phil.cdc.gov/Details.aspx?pid=5789.10. CDC/ Dr. George Kubica. #16484
Caption: "This image depicts a close view of the surface of an unidentified Petri dish culture dish growth medium, which had been inoculated with the organism Mycobacterium tuberculosis, highlighting the bacterium’s colonial morphology. Note the colorless, rough surface, which are typical morphologic characteristics seen in M. tuberculosis colonies. Macroscopic examination of colonial growth patterns is still one of the ways microorganisms are often identified." PHIL public domain. 1976. Accessed May 11, 2022. https://phil.cdc.gov/Details.aspx?pid=1648411. CDC/ Dr. UP Kokko. #12128
Caption: "This historic 1963 photograph depicted a laboratorian performing an examination of an agar Petri dish culture plate, known as a Felsen quadrant culture plate, as part of a Mycobacterium tuberculosis drug susceptibility test." PHIL image, public domain. 1963. Accessed May 11, 2022. https://phil.cdc.gov/Details.aspx?pid=12128.12. CDC/ Ronald Smithwick. #14766
Caption: "Under a magnification of 1000X, this Ziehl-Neelsen stained mycobacterial culture specimen, reveals numerous acid-fast bacilli, which by growing end-to-end, now displayed a morphologic phenomenon known as cording." PHIL public domain image. 1975. Accessed May 11, 2022. https://phil.cdc.gov/Details.aspx?pid=14766.