EN
Pseudomonas spp., are Gram-negative rods belonging to the Pseudomonadaceae family. These bacteria often change their phenotypic characteristics, are very adaptable and also resistant to most of the utilized antibiotics and disinfectants. The major representative of these bacteria is Pseudomonas aeruginosa (blue pus rod), which is primarily considered as a dangerous pathogen not only to humans but also for animals. P. aeruginosa is isolated from the gastrointestinal tract but these bacteria also constitute physiological microflora of the semen. Strains with increased virulence present in semen may involve the reproductive processes of the utilized breeds. These microorganisms are also used in ecology for the decomposition of oil-derivative components.