| Campylobacter blaseri |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae,
Genus Campylobacter, Campylobacter blaseri Gilbert et al. 2018.
Genus Campylobacter, Campylobacter blaseri Gilbert et al. 2018.
Gram-negative, straight to slightly curved rods. Non-motile.
After incubation on Columbia agar + 5% sheep blood in a microaerobic atmosphere
at 37 ºC for 72 h, colonies of most isolates appear transparent to greyish white and
are 1-2 mm, raised and circular with entire margins and a smooth surface.
Morphology is similar under anaerobic conditions, but colonies appear transparent
and are less than 1 mm. One isolate displays raised and circular colonies with
undulate margins and an irregular surface. Under anaerobic conditions, this isolate
displays flat transparent colonies with a slightly elevated centre. Alpha-haemolysis is
not produced. In a microaerobic atmosphere, growth is observed at 25, 37 and 42 ºC,
but not at 18-22 ºC. Growth is slightly inhibited under anaerobic conditions, but no
growth is detected under aerobic conditions at 37 ºC. Growth is slightly inhibited in the
absence of H2 at microaerobic conditions. In a microaerobic atmosphere at 37 ºC,
growth is normal on Skirrow agar, slightly inhibited on Preston and MacConkey agar,
and none detected on CCD and Blaser-Wang agar. Weak growth in the presence of
1% glycine.
at 37 ºC for 72 h, colonies of most isolates appear transparent to greyish white and
are 1-2 mm, raised and circular with entire margins and a smooth surface.
Morphology is similar under anaerobic conditions, but colonies appear transparent
and are less than 1 mm. One isolate displays raised and circular colonies with
undulate margins and an irregular surface. Under anaerobic conditions, this isolate
displays flat transparent colonies with a slightly elevated centre. Alpha-haemolysis is
not produced. In a microaerobic atmosphere, growth is observed at 25, 37 and 42 ºC,
but not at 18-22 ºC. Growth is slightly inhibited under anaerobic conditions, but no
growth is detected under aerobic conditions at 37 ºC. Growth is slightly inhibited in the
absence of H2 at microaerobic conditions. In a microaerobic atmosphere at 37 ºC,
growth is normal on Skirrow agar, slightly inhibited on Preston and MacConkey agar,
and none detected on CCD and Blaser-Wang agar. Weak growth in the presence of
1% glycine.
Isolated from common seal (Phoca vitulina).
Susceptible to cephalothin, and most are susceptible to nalidixic acid.
Susceptible to cephalothin, and most are susceptible to nalidixic acid.
Pathogenicity is unknown. It is possible to be a commensal in pinnipeds.
- Gilbert MJ, Zomer AL, Timmerman AJ, Spaninks MP, Rubio-Garcia A, Rossen JW, Duim B, Wagenaar JA. Campylobacter blaseri
sp. nov., isolated from common seals (Phoca vitulina). Int J Syst Evol Microbiol 2018; 68:1787-1794.
Positive results for alkaline phosphatase, catalase, H2S production on TSI, indoxyl acetate hydrolysis, nitrate reduction, oxidase and
urea hydrolysis.
Negative results for hippurate hydolysis and gamma-glutamyl transferase.
urea hydrolysis.
Negative results for hippurate hydolysis and gamma-glutamyl transferase.
(c) Costin Stoica
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