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| 5) Ascoli reaction (precipitation reaction) Left: positive, and Right:negative control |
6) Phage test: 1. Isolated bacilli to be tested (positive) 2. B. cereus (negative control) 3. B. antharcis (positive control) |
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| 7) Bacillus anthracis subjected to the Pearl-string test, forming pearl-like bulgy chains (penicillin added agar). |
8) Bacillus anthracis seen on direct smear speci- men of the spleen of experimentally inoculated mice (Giemsa staining). |
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