Ochrobactrum anthropi

Ochrobactrum anthropi is a motile, catalase-positive, oxidase-positive, indole-negative, urease-positive, gram-negative rod. It is a non-fermenter, and grows on Choc, sheep blood, MacConkey and SS agar.

Phylogeny

Both Ochrobactrum species, anthropi and intermedius cannot be distinguished biochemically. Ochrobactrum intermedius is phylogenetically positioned between O. anthropi and Brucella. Classifying Ochrobactrum and Brucella spp can be difficult due to similarities of the species (here, here, here and here). Ochrobacter anthropi consists of Achromobacter groups Vd (biotypes 1 and 2) and Achromobacter groups A, C and D.

Pathogenicity

Ochrobacter have been found in peritoneal dialysis patients, bacteremia in pediatric patient with CF, septicemia, endocarditis with or without sepsis,

Susceptibility

Ochrobacter spp are usually resistant to betalactam antibiotics: penicillins and broad-spectrum cephalosporins, aztreonam and amoxicillin-clavulanate but susceptible to aminoglycosides, fluoroquinolones, imipenem, tetracycline and trimethprim-sulfamethoxazole (from Murray 9th).

This isolate (pdf) was found susceptible to gentamicin, amikacin, trimethoprim-sulfamethoxazole, imipenem and ciprofloxacin but resistant to betalactams other than carbapenems, erytromycin and cholamphenicol.

In general, isolates of Ochrobactrum anthropi are widely resistant to chloramphenicol and β-lactams, particularly cephalosporins, and penicillins. Co-trimoxazole (trimethoprim-sulfamethoxazole), quinolones, and aminoglycosides, particularly amikacin and gentamicin, appear to be the most active antibiotics.

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Related posts:

  1. Laribacter hongkongensis
  2. Aminoglycosides and Enterococci
  3. Capnocytophaga
  4. Non-fermenters
  5. Pseudomonas aeruginosa
  6. Stenotrophomonas maltophilia
  7. Proteus vulgaris
  8. Klebsiella oxytoca
  9. Chromobacterium
  10. Brucella – brucellosis

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