Abstract
Labrec et al.7 established in 1964 that invasion into epithelial cells was the essential early step in the pathogenesis of bacillary dysentery. The virulent translucent strain of Shigella flexneri invaded the intestinal epithelium, while the avirulent opaque variant did not, in spite of the finding, that both had the same LD50 upon intraperitoneal injection. Ogawa et al.15 performed similar experiments and obtained essentially the same results. However, they made one important additional observation; within 24 hours of infection, the bacteria existed exclusively in the epithelial cells without direct penetration into the lamina propria and bacterial multiplication therein. Thus, virulent shigellae invade the colonic epithelium and spread successively to adjacent epithelial cells resulting in a severe inflammatory reaction, further spread of the bacteria to deeper tissue and, ultimately, to ulceration and bloody diarrhea.
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© 1990 Plenum Press, New York
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Yoshikawa, M., Sasakawa, C., Sakai, T., Yamada, M., Okada, N., Makino, Si. (1990). Molecular Genetic Analysis of Virulence Factors of Shigella Flexneri . In: Pohland, A.E., et al. Microbial Toxins in Foods and Feeds. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0663-4_23
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DOI: https://doi.org/10.1007/978-1-4613-0663-4_23
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