Film: 6975

Medicine | 1950 | Sound | B/W


A chart summarises the effects of penicillin on bacteria. Normal speed photography of the movement of toxic cells. A slide showing bacteria development after exposure to penicillin. A bacillus megafarium is exposed to egg white (which contains lysozyme, the cell contents escape forming a protoplast, which appear as dark circles). Penicillin can also cause the creation of protoplasts (morphological changes). Elongated bacterial cells forming under anaerobic conditions. A strain of Salmonella under the effect of the antibiotic chloramphenicol. Two slides showing salmonella growing on a normal medium and on a medium containing chloramphenicol, the rate of division is altered. A graph shows the relationship between chloramphenicol concentration and the rate of growth. Two slides shown side by side compare and contrast the effects of chloramphenicol and penicillin have on bacteria.

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