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. 1986 Nov;24(5):840–843. doi: 10.1128/jcm.24.5.840-843.1986

Modified selective medium for isolation of Campylobacter spp. from feces: comparison with Preston medium, a blood-free medium, and a filtration system.

H Goossens, M De Boeck, H Coignau, L Vlaes, C Van den Borre, J P Butzler
PMCID: PMC269038  PMID: 3771769

Abstract

Our previously described (H. Goossens, M. De Boeck, and J. P. Butzler, Eur. J. Clin. Microbiol. 2:389-393, 1983) selective medium, consisting of cefoperazone (15 mg/liter), rifampin (10 mg/liter), colistin (10,000 IU/liter), and amphotericin B (2 mg/liter) (medium M1), for the isolation of Campylobacter jejuni and Campylobacter coli from stool specimens was modified as follows: cefoperazone (30 mg/liter), rifampin (10 mg/liter), and amphotericin B (2 mg/liter) (medium M2). A comparative study of the isolation of Campylobacter spp. from stool specimens was carried out with medium M1; medium M2; a selective blood-free medium consisting (per liter) of charcoal (4 g), ferrous sulfate (0.25 g), sodium pyruvate (0.25 g), casein hydrolysate (3 g), sodium deoxycholate (1 g), nutrient broth no. 2 (25 g), agar (12 g), and cefoperazone (32 mg) (medium M3); and Preston medium containing (per liter) trimethoprim (10 mg), rifampin (10 mg), polymyxin B (5,000 IU), and cycloheximide (100 mg) (medium M4). We also included a filtration system in which membrane filters were applied directly to the surface of the nonselective blood-free medium distributed in small petri dishes. A total of 5,276 stool specimens were tested: 2,788 stool specimens were tested on M1 and M3 in study 1; 2,488 stool specimens were inoculated on the four selective media in study 2, and the last 986 specimens of the 2,488 were tested in parallel with the filtration system. In study 2, 128 Campylobacter strains were isolated from 126 different patients; 85.0, 88.3, 82.5, and 66.6% of these strains were isolated on M1, M2, M3, and M4, respectively. No contaminating fecal flora was found on 65.4, 70.7, 62.4, and 40.3% of the M1, M2, M3, and M4 plates, respectively. Furthermore, C. coli was found to be more susceptible to antibiotics present in the selective media, particularly colistin and polymyxin B, than was C. jejuni. We therefore recommend M2 for the isolation of Campylobacter spp. Finally, the filtration method was found to be easy and cheap; although the sensitivity was low, this method allowed the isolation of new Campylobacter spp. which seem to be associated with diarrhea.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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