Bifidobacterium choerinum Scardovi et al.
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2. Under anaerobic conditions, withdraw 0.5 ml of #1053 from a single test tube (5 to 6 ml) and rehydrate the vial contents.
3. Aseptically transfer this aliquot back into the broth tube. Additional tubes may be inoculated with 0.5 ml each from the suspension. A slant of #1053 may also be inoculated with 0.2 ml. Streak several blood plates to check for colonial morphology and purity.
4. Incubate tubes under an anaerobic atmosphere at 37oC. Incubate one agar plate anaerobically for colony formation, and one aerobically for aerobic contamination check.
5. Within 24 to 48 hours, growth should be evident by good turbidity in the broth and colonies on the anaerobic agar slant surface. After two days, the anaerobic plate will have colonies that are tiny and clear with an irregular margin. The aerobic plate should show no signs of aerobic growth.
Anaerobic conditions for transfer may be obtained by either of the following:
· Use of an anaerobic gas chamber, or
· Placement of test tubes under a gassing cannula system hooked to anaerobic gas.
Anaerobic conditions for incubation may be obtained by any of the following:
· Loose screw caps on test tubes in anaerobic chamber,
· Loose screw caps on test tubes in an activated anaerobic gas pack jar, or
· Use of sterile butyl rubber stoppers on test tubes so that an anaerobic gas headspace is retained.
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Scardovi V, et al. Bifidobacterium cuniculi, Bifidobacterium choerinum, Bifidobacterium boum, and Bifidobacterium pseudocatenulatum: Four new species and their deoxyribonucleic acid homology relationships. Int. J. Syst. Bacteriol. 29: 291-311, 1979.
Skerman VB, et al. Approved lists of bacterial names. Int J Syst Bacteriol 30: 225-420, 1980.