| Arcobacter canalis |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Epsilonproteobacteria, Order Campylobacterales, Family Arcobacteraceae, Genus
Arcobacter, Arcobacter canalis Perez-Cataluna et al. 2018.
Synonyms: Malaciobacter canalis corrig. (Perez-Cataluna et al. 2018) Perez-Cataluna et al. 2019.
Arcobacter, Arcobacter canalis Perez-Cataluna et al. 2018.
Synonyms: Malaciobacter canalis corrig. (Perez-Cataluna et al. 2018) Perez-Cataluna et al. 2019.
Gram-negative, slightly curved rods, 0.2-0.4 x 1.2-2.8 μm. Motile by a single polar flagellum. Non-spore-forming. Non-encapsulated.
Colonies on marine agar incubated under aerobic conditions at 30 ºC for 48 h are 2–
4 mm in diameter, pale yellow to pale orange, circular with entire margins, convex and
non-swarming. Pigments are not produced in marine agar. Strains grow on marine
agar at 22–25, 30 and 37 ºC under aerobic, microaerobic and anaerobic conditions,
and at 42 ºC under aerobic and microaerobic conditions. After 48 h, colonies are
smaller at 37 and 42 ºC than at room temperature or 30 ºC. No growth is observed in
blood agar at the different temperatures tested nor under the different atmospheric
conditions. Under aerobic conditions at 30 ºC, grows on minimal medium with 2%
NaCl and on nutrient medium supplemented with 5% sheep blood and 2% NaCl
containing 0.05% safranin or 0.005% crystal violet. Strain-depended growth on 0.05 %
basic fuchsine, 0.01% brilliant green and MacConkey agar supplemented with 2%
NaCl. No growth on campylobacter charcoal deoxycholate agar (CCDA), on nutrient
medium + 5% sheep blood containing 0.5% NaCl, 1% oxgall, 0.1% sodium
deoxycholate, 1% glycine or 0.01-0.1% 2,3,5-triphenyltetrazolium chloride.
4 mm in diameter, pale yellow to pale orange, circular with entire margins, convex and
non-swarming. Pigments are not produced in marine agar. Strains grow on marine
agar at 22–25, 30 and 37 ºC under aerobic, microaerobic and anaerobic conditions,
and at 42 ºC under aerobic and microaerobic conditions. After 48 h, colonies are
smaller at 37 and 42 ºC than at room temperature or 30 ºC. No growth is observed in
blood agar at the different temperatures tested nor under the different atmospheric
conditions. Under aerobic conditions at 30 ºC, grows on minimal medium with 2%
NaCl and on nutrient medium supplemented with 5% sheep blood and 2% NaCl
containing 0.05% safranin or 0.005% crystal violet. Strain-depended growth on 0.05 %
basic fuchsine, 0.01% brilliant green and MacConkey agar supplemented with 2%
NaCl. No growth on campylobacter charcoal deoxycholate agar (CCDA), on nutrient
medium + 5% sheep blood containing 0.5% NaCl, 1% oxgall, 0.1% sodium
deoxycholate, 1% glycine or 0.01-0.1% 2,3,5-triphenyltetrazolium chloride.
Isolated from shellfish and from the water of a canal contaminated with urban sewage.
Susceptible to cefoperazone and nalidixic acid. Variable resistance to cefalotin.
Susceptible to cefoperazone and nalidixic acid. Variable resistance to cefalotin.
Undetermined.
- Perez-Cataluna A, Salas-Masso N, Figueras MJ. Arcobacter canalis sp. nov., isolated from a water canal contaminated with urban
sewage. Int J Syst Evol Microbiol 2018; 68:1258-1264.
Positive results for catalase, H2S production on TSI and oxidase.
Negative results for caseinase, indoxyl acetate hydrolysis, lecithinase, nitrate reduction, urease, starch hydrolysis, acid production
from glucose.
Negative results for caseinase, indoxyl acetate hydrolysis, lecithinase, nitrate reduction, urease, starch hydrolysis, acid production
from glucose.
(c) Costin Stoica
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