| Campylobacter pinnipediorum |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Epsilonproteobacteria, Order Campylobacterales, Family Campylobacteraceae,
Genus Campylobacter, Campylobacter pinnipediorum Gilbert et al. 2017. Subspecies:
- Campylobacter pinnipediorum subsp. caledonicus Gilbert et al. 2017,
- Campylobacter pinnipediorum subsp. pinnipediorum Gilbert et al. 2017.
Genus Campylobacter, Campylobacter pinnipediorum Gilbert et al. 2017. Subspecies:
- Campylobacter pinnipediorum subsp. caledonicus Gilbert et al. 2017,
- Campylobacter pinnipediorum subsp. pinnipediorum Gilbert et al. 2017.
Gram-negative, slightly curved to spiral-shaped rods.
After incubation on Columbia agar + 5% sheep blood in a microaerobic atmosphere
at 37 ºC for 72 h, colonies appear transparent to beige, glossy, slightly raised and
circular with smooth margins. Most colonies are small (<0.5 mm), flat and appear
transparent to beige; however, a minority are larger (0.5-1 mm), slightly raised,
whitish and translucent, which showing alpha-haemolysis. After 1 week of growth
at 37 ºC in a microaerobic atmosphere, colonies are 2-3 mm and appear circular with
smooth margins, whitish, translucent and with a greenish periphery due to
alpha-haemolysis; however, in an anaerobic atmosphere, colonies appear circular
with smooth margins, transparent with a whitish centre and radiating from the centre,
while alpha-haemolysis is absent. No growth under aerobic conditions. H2 is not
required for growth. In a microaerobic atmosphere, growth is observed after 48 h at
25 and 37 ºC, but not at room temperature (18-22 ºC) or at 42 ºC.
Grows on Skirrow agar, but not on charcoal cefoperazone deoxycholate agar and no
or limited growth is observed on IST agar, Mueller-Hinton agar or in the presence of
1% glycine.
at 37 ºC for 72 h, colonies appear transparent to beige, glossy, slightly raised and
circular with smooth margins. Most colonies are small (<0.5 mm), flat and appear
transparent to beige; however, a minority are larger (0.5-1 mm), slightly raised,
whitish and translucent, which showing alpha-haemolysis. After 1 week of growth
at 37 ºC in a microaerobic atmosphere, colonies are 2-3 mm and appear circular with
smooth margins, whitish, translucent and with a greenish periphery due to
alpha-haemolysis; however, in an anaerobic atmosphere, colonies appear circular
with smooth margins, transparent with a whitish centre and radiating from the centre,
while alpha-haemolysis is absent. No growth under aerobic conditions. H2 is not
required for growth. In a microaerobic atmosphere, growth is observed after 48 h at
25 and 37 ºC, but not at room temperature (18-22 ºC) or at 42 ºC.
Grows on Skirrow agar, but not on charcoal cefoperazone deoxycholate agar and no
or limited growth is observed on IST agar, Mueller-Hinton agar or in the presence of
1% glycine.
Isolated from oral, rectal and abscesses (lung, shoulder, submaxillary) samples of a California sea lion (Zalophus californianus),
grey seal (Halichoerus grypus) and common seal (Phoca vitulina).
Susceptible to cefalotin and nalidixic acid.
grey seal (Halichoerus grypus) and common seal (Phoca vitulina).
Susceptible to cefalotin and nalidixic acid.
Pathogenicity is unknown, although strains were isolated from abscesses and internal organs of different seal species.
- Gilbert MJ, Miller WG, Leger JS, Chapman MH, Timmerman AJ, Duim B, Foster G, Wagenaar JA. Campylobacter pinnipediorum
sp. nov., isolated from pinnipeds, comprising Campylobacter pinnipediorum subsp. pinnipediorum subsp. nov. and
Campylobacter pinnipediorum subsp. caledonicus subsp. nov. Int J Syst Evol Microbiol 2017; 67:1961-1968.
Positive results for gamma-glutamyl transferase, H2S production on TSI, nitrate reduction, oxidase and urea hydrolysis.
Negative results for hippurate hydolysis and indoxyl acetate hydrolysis.
Subspecies caledonicus can be distinguished from subsp. pinnipediorum by divergent AtpA sequence and the lack of catalase activity.
Negative results for hippurate hydolysis and indoxyl acetate hydrolysis.
Subspecies caledonicus can be distinguished from subsp. pinnipediorum by divergent AtpA sequence and the lack of catalase activity.
(c) Costin Stoica
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