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Abstract
Clostridium citroniae is a novel species reclassified from C. clostridioforme. Clostridium species are obligate anaerobes and spore-forming gram-positive rods. However, C. citroniae stains gram negative and does not consistently produce spores, making it difficult to identify. We isolated C. citroniae from the blood and peritoneal fluid of one patient, and from the blood of another patient, both of whom were undergoing cancer chemotherapy.
REFERENCES
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Table 1.
Biochemical characteristics of C. citroniae clinical isolates
| Phenotypic characteristics | C. citroniae∗ | Case 1 | Case 2 |
|---|---|---|---|
| Gram stain | Positive | Negative | Negative |
| Indole production | ＋ | ＋ | ＋ |
| Urease | − | − | − |
| Reduction of nitrate | − | − | − |
| Acid production from | |||
| Lactose | − | − | − |
| Mannose | ＋ | ＋ | ＋ |
| Melezitose | − | − | − |
| Raffinose | − | − | − |
| Rhamnose | ＋ | ＋ | ＋ |
| α-arabinosidase | − | − | − |
| α-galactosidase | − | − | − |
| α-glucosidase | − | − | − |
| β-galactosidase | − | − | − |
| β-galactosidase-6-phosphate | − | − | − |
| β-glucosidase | − | − | − |
| β-glucuronidase | − | − | − |
| Alanine arylamidase | − | − | − |
| Alkaline phosphatase | ＋ | − | − |
| Arginine arylamidase | − | − | − |
| Arginine dihydrolase | − | − | − |
| Glycine arylamidase | − | − | − |
| Leucyl glycine arylamidase | − | − | − |
| N-acetyl-β-glucosaminidase | − | − | − |
| Phenylalanine arylamidase | − | − | − |
| Proline arylamidase | − | − | − |
| Pyroglutamic acid arylamidas | se − | − | − |
| Tyrosine arylamidase | − | − | − |
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