| paracoccus denitrificans | A species of bacteria isolated from soil. (12 Dec 1998) |
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| paracoccus | Gram-negative non-motile bacteria found in soil or brines. (12 Dec 1998) |
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| Listeria denitrificans | A species found in cooked blood of beef; pathogenic to rats and mice when injected intraperitoneally. (05 Mar 2000) |