Alcaligenes spp

From Dog
Alcaligenes faecalis on agar culture

Alcaligenes spp are a Gram negative aerobic proteobacteria.

Closely related to Burkholderia spp, these bacteria are opportunistic organisms normally found in humid environments.

Species which are pathogenic to dogs include:

  • Alcaligenes faecalis
  • Alcaligenes xylosoxidans
  • Alcaligenes odorans[1]

In dogs, Acaligenes spp are part of the normal microflora of the skin[2], reproductive[3] and gastrointestinal tract[4], and have been reported in association with otitis externa and following prosthetic hip replacement[5].

Alcaligenes species are resistant to almost all antibiotics except gentamicin and colistin[6].


  1. Mathewson JJ & Simpson RB (1982) Glucose-nonfermenting Gram-negative bacilli associated with clinical veterinary specimens. J Clin Microbiol 15(6):1016-1018
  2. Krogh HV & Kristensen S (1976) A study of skin diseases in dogs and cats. II. Microflora of the normal skin of dogs and cats. Nord Vet Med 28(9):459-463
  3. Watts JR et al(1996) Uterine, cervical and vaginal microflora of the normal bitch throughout the reproductive cycle. J Small Anim Pract 37(2):54-60
  4. Suchodolski JS et al (2010) Molecular analysis of the bacterial microbiota in duodenal biopsies from dogs with idiopathic inflammatory bowel disease. Vet Microbiol 142(3-4):394-400
  5. Girling SL & Innes JF (2006) Infection of a total hip prosthesis in a dog caused by Achromobacter(Alcaligenes) xylosoxidans. J Small Anim Pract 47(12):747-750
  6. Baba E & Fukata T (1981) Incidence of otitis externa in dogs and cats in Japan. Vet Rec 108(18):393-395