Pseudomonas spp

From Cow
Pseudomonas aeruginosa colonies on agar

Pseudomonas spp are an opportunistic flagellated Gram-negative bacteria that cause diseases in cattle worldwide.

This bacteria manages to evade the host by avoiding recognition by flagellin-specific pattern-recognition receptors[1].

Species which have been recorded as pathogenic to cattle include:

  • Pseudomonas aeruginosa
  • Pseudomonas mendocina

Diseases which are caused by this bacteria in cattle include mastitis[2] and pneumonia, resulting in significant morbidity and culling[3].

These bacteria are naturally resistant to penicillins but sensitive to enrofloxacin, gentamicin[4] and ceftiofur.


  1. Bardoel BW et al (2011) Pseudomonas evades immune recognition of flagellin in both mammals and plants. PLoS Pathog 7(8):e1002206
  2. Bhatt VD et al (2012) Milk microbiome signatures of subclinical mastitis-affected cattle analysed by shotgun sequencing. J Appl Microbiol 112(4):639-650
  3. Hertl JA et al (2011) The effect of recurrent episodes of clinical mastitis caused by gram-positive and gram-negative bacteria and other organisms on mortality and culling in Holstein dairy cows. J Dairy Sci 94(10):4863-4877
  4. Merck Vet Manual